summaryrefslogtreecommitdiff
path: root/extlib/DB/DataObject.php
blob: 60ff1441b5a6a8042b781d5a8b5c3af728061362 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
<?php
/**
 * Object Based Database Query Builder and data store
 *
 * For PHP versions 4,5 and 6
 *
 * LICENSE: This source file is subject to version 3.01 of the PHP license
 * that is available through the world-wide-web at the following URI:
 * http://www.php.net/license/3_01.txt.  If you did not receive a copy of
 * the PHP License and are unable to obtain it through the web, please
 * send a note to license@php.net so we can mail you a copy immediately.
 *
 * @category   Database
 * @package    DB_DataObject
 * @author     Alan Knowles <alan@akbkhome.com>
 * @copyright  1997-2006 The PHP Group
 * @license    http://www.php.net/license/3_01.txt  PHP License 3.01
 * @version    CVS: $Id: DataObject.php 284150 2009-07-15 23:27:59Z alan_k $
 * @link       http://pear.php.net/package/DB_DataObject
 */
  

/* =========================================================================== 
 *
 *    !!!!!!!!!!!!!               W A R N I N G                !!!!!!!!!!!
 *
 *  THIS MAY SEGFAULT PHP IF YOU ARE USING THE ZEND OPTIMIZER (to fix it, 
 *  just add "define('DB_DATAOBJECT_NO_OVERLOAD',true);" before you include 
 *  this file. reducing the optimization level may also solve the segfault.
 *  ===========================================================================
 */

/**
 * The main "DB_DataObject" class is really a base class for your own tables classes
 *
 * // Set up the class by creating an ini file (refer to the manual for more details
 * [DB_DataObject]
 * database         = mysql:/username:password@host/database
 * schema_location = /home/myapplication/database
 * class_location  = /home/myapplication/DBTables/
 * clase_prefix    = DBTables_
 *
 *
 * //Start and initialize...................... - dont forget the &
 * $config = parse_ini_file('example.ini',true);
 * $options = &PEAR::getStaticProperty('DB_DataObject','options');
 * $options = $config['DB_DataObject'];
 *
 * // example of a class (that does not use the 'auto generated tables data')
 * class mytable extends DB_DataObject {
 *     // mandatory - set the table
 *     var $_database_dsn = "mysql://username:password@localhost/database";
 *     var $__table = "mytable";
 *     function table() {
 *         return array(
 *             'id' => 1, // integer or number
 *             'name' => 2, // string
 *        );
 *     }
 *     function keys() {
 *         return array('id');
 *     }
 * }
 *
 * // use in the application
 *
 *
 * Simple get one row
 *
 * $instance = new mytable;
 * $instance->get("id",12);
 * echo $instance->somedata;
 *
 *
 * Get multiple rows
 *
 * $instance = new mytable;
 * $instance->whereAdd("ID > 12");
 * $instance->whereAdd("ID < 14");
 * $instance->find();
 * while ($instance->fetch()) {
 *     echo $instance->somedata;
 * }


/**
 * Needed classes
 * - we use getStaticProperty from PEAR pretty extensively (cant remove it ATM)
 */

require_once 'PEAR.php';

/**
 * We are duping fetchmode constants to be compatible with
 * both DB and MDB2
 */
define('DB_DATAOBJECT_FETCHMODE_ORDERED',1); 
define('DB_DATAOBJECT_FETCHMODE_ASSOC',2);





/**
 * these are constants for the get_table array
 * user to determine what type of escaping is required around the object vars.
 */
define('DB_DATAOBJECT_INT',  1);  // does not require ''
define('DB_DATAOBJECT_STR',  2);  // requires ''

define('DB_DATAOBJECT_DATE', 4);  // is date #TODO
define('DB_DATAOBJECT_TIME', 8);  // is time #TODO
define('DB_DATAOBJECT_BOOL', 16); // is boolean #TODO
define('DB_DATAOBJECT_TXT',  32); // is long text #TODO
define('DB_DATAOBJECT_BLOB', 64); // is blob type


define('DB_DATAOBJECT_NOTNULL', 128);           // not null col.
define('DB_DATAOBJECT_MYSQLTIMESTAMP'   , 256);           // mysql timestamps (ignored by update/insert)
/*
 * Define this before you include DataObjects.php to  disable overload - if it segfaults due to Zend optimizer..
 */
//define('DB_DATAOBJECT_NO_OVERLOAD',true)  


/**
 * Theses are the standard error codes, most methods will fail silently - and return false
 * to access the error message either use $table->_lastError
 * or $last_error = PEAR::getStaticProperty('DB_DataObject','lastError');
 * the code is $last_error->code, and the message is $last_error->message (a standard PEAR error)
 */

define('DB_DATAOBJECT_ERROR_INVALIDARGS',   -1);  // wrong args to function
define('DB_DATAOBJECT_ERROR_NODATA',        -2);  // no data available
define('DB_DATAOBJECT_ERROR_INVALIDCONFIG', -3);  // something wrong with the config
define('DB_DATAOBJECT_ERROR_NOCLASS',       -4);  // no class exists
define('DB_DATAOBJECT_ERROR_INVALID_CALL'  ,-7);  // overlad getter/setter failure

/**
 * Used in methods like delete() and count() to specify that the method should
 * build the condition only out of the whereAdd's and not the object parameters.
 */
define('DB_DATAOBJECT_WHEREADD_ONLY', true);

/**
 *
 * storage for connection and result objects,
 * it is done this way so that print_r()'ing the is smaller, and
 * it reduces the memory size of the object.
 * -- future versions may use $this->_connection = & PEAR object..
 *   although will need speed tests to see how this affects it.
 * - includes sub arrays
 *   - connections = md5 sum mapp to pear db object
 *   - results     = [id] => map to pear db object
 *   - resultseq   = sequence id for results & results field
 *   - resultfields = [id] => list of fields return from query (for use with toArray())
 *   - ini         = mapping of database to ini file results
 *   - links       = mapping of database to links file
 *   - lasterror   = pear error objects for last error event.
 *   - config      = aliased view of PEAR::getStaticPropery('DB_DataObject','options') * done for performance.
 *   - array of loaded classes by autoload method - to stop it doing file access request over and over again!
 */
$GLOBALS['_DB_DATAOBJECT']['RESULTS']   = array();
$GLOBALS['_DB_DATAOBJECT']['RESULTSEQ'] = 1;
$GLOBALS['_DB_DATAOBJECT']['RESULTFIELDS'] = array();
$GLOBALS['_DB_DATAOBJECT']['CONNECTIONS'] = array();
$GLOBALS['_DB_DATAOBJECT']['INI'] = array();
$GLOBALS['_DB_DATAOBJECT']['LINKS'] = array();
$GLOBALS['_DB_DATAOBJECT']['SEQUENCE'] = array();
$GLOBALS['_DB_DATAOBJECT']['LASTERROR'] = null;
$GLOBALS['_DB_DATAOBJECT']['CONFIG'] = array();
$GLOBALS['_DB_DATAOBJECT']['CACHE'] = array();
$GLOBALS['_DB_DATAOBJECT']['OVERLOADED'] = false;
$GLOBALS['_DB_DATAOBJECT']['QUERYENDTIME'] = 0;


 
// this will be horrifically slow!!!!
// NOTE: Overload SEGFAULTS ON PHP4 + Zend Optimizer (see define before..)
// these two are BC/FC handlers for call in PHP4/5

if ( substr(phpversion(),0,1) == 5) {
    class DB_DataObject_Overload 
    {
        function __call($method,$args) 
        {
            $return = null;
            $this->_call($method,$args,$return);
            return $return;
        }
        function __sleep() 
        {
            return array_keys(get_object_vars($this)) ; 
        }
    }
} else {
    if (version_compare(phpversion(),'4.3.10','eq') && !defined('DB_DATAOBJECT_NO_OVERLOAD')) {
        trigger_error(
            "overload does not work with PHP4.3.10, either upgrade 
            (snaps.php.net) or more recent version 
            or define DB_DATAOBJECT_NO_OVERLOAD as per the manual.
            ",E_USER_ERROR);
    }

    if (!function_exists('clone')) {
        // emulate clone  - as per php_compact, slow but really the correct behaviour..
        eval('function clone($t) { $r = $t; if (method_exists($r,"__clone")) { $r->__clone(); } return $r; }');
    }
    eval('
        class DB_DataObject_Overload {
            function __call($method,$args,&$return) {
                return $this->_call($method,$args,$return); 
            }
        }
    ');
}

    


 

 /*
 *
 * @package  DB_DataObject
 * @author   Alan Knowles <alan@akbkhome.com>
 * @since    PHP 4.0
 */
 
class DB_DataObject extends DB_DataObject_Overload
{
   /**
    * The Version - use this to check feature changes
    *
    * @access   private
    * @var      string
    */
    var $_DB_DataObject_version = "1.8.12";

    /**
     * The Database table (used by table extends)
     *
     * @access  private
     * @var     string
     */
    var $__table = '';  // database table

    /**
     * The Number of rows returned from a query
     *
     * @access  public
     * @var     int
     */
    var $N = 0;  // Number of rows returned from a query

    /* ============================================================= */
    /*                      Major Public Methods                     */
    /* (designed to be optionally then called with parent::method()) */
    /* ============================================================= */


    /**
     * Get a result using key, value.
     *
     * for example
     * $object->get("ID",1234);
     * Returns Number of rows located (usually 1) for success,
     * and puts all the table columns into this classes variables
     *
     * see the fetch example on how to extend this.
     *
     * if no value is entered, it is assumed that $key is a value
     * and get will then use the first key in keys()
     * to obtain the key.
     *
     * @param   string  $k column
     * @param   string  $v value
     * @access  public
     * @return  int     No. of rows
     */
    function get($k = null, $v = null)
    {
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        $keys = array();
        
        if ($v === null) {
            $v = $k;
            $keys = $this->keys();
            if (!$keys) {
                $this->raiseError("No Keys available for {$this->__table}", DB_DATAOBJECT_ERROR_INVALIDCONFIG);
                return false;
            }
            $k = $keys[0];
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("$k $v " .print_r($keys,true), "GET");
        }
        
        if ($v === null) {
            $this->raiseError("No Value specified for get", DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        $this->$k = $v;
        return $this->find(1);
    }

    /**
     * An autoloading, caching static get method  using key, value (based on get)
     *
     * Usage:
     * $object = DB_DataObject::staticGet("DbTable_mytable",12);
     * or
     * $object =  DB_DataObject::staticGet("DbTable_mytable","name","fred");
     *
     * or write it into your extended class:
     * function &staticGet($k,$v=NULL) { return DB_DataObject::staticGet("This_Class",$k,$v);  }
     *
     * @param   string  $class class name
     * @param   string  $k     column (or value if using keys)
     * @param   string  $v     value (optional)
     * @access  public
     * @return  object
     */
    function &staticGet($class, $k, $v = null)
    {
        $lclass = strtolower($class);
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }

        

        $key = "$k:$v";
        if ($v === null) {
            $key = $k;
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            DB_DataObject::debug("$class $key","STATIC GET - TRY CACHE");
        }
        if (!empty($_DB_DATAOBJECT['CACHE'][$lclass][$key])) {
            return $_DB_DATAOBJECT['CACHE'][$lclass][$key];
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            DB_DataObject::debug("$class $key","STATIC GET - NOT IN CACHE");
        }

        $obj = DB_DataObject::factory(substr($class,strlen($_DB_DATAOBJECT['CONFIG']['class_prefix'])));
        if (PEAR::isError($obj)) {
            DB_DataObject::raiseError("could not autoload $class", DB_DATAOBJECT_ERROR_NOCLASS);
            $r = false;
            return $r;
        }
        
        if (!isset($_DB_DATAOBJECT['CACHE'][$lclass])) {
            $_DB_DATAOBJECT['CACHE'][$lclass] = array();
        }
        if (!$obj->get($k,$v)) {
            DB_DataObject::raiseError("No Data return from get $k $v", DB_DATAOBJECT_ERROR_NODATA);
            
            $r = false;
            return $r;
        }
        $_DB_DATAOBJECT['CACHE'][$lclass][$key] = $obj;
        return $_DB_DATAOBJECT['CACHE'][$lclass][$key];
    }

    /**
     * find results, either normal or crosstable
     *
     * for example
     *
     * $object = new mytable();
     * $object->ID = 1;
     * $object->find();
     *
     *
     * will set $object->N to number of rows, and expects next command to fetch rows
     * will return $object->N
     *
     * @param   boolean $n Fetch first result
     * @access  public
     * @return  mixed (number of rows returned, or true if numRows fetching is not supported)
     */
    function find($n = false)
    {
        global $_DB_DATAOBJECT;
        if ($this->_query === false) {
            $this->raiseError(
                "You cannot do two queries on the same object (copy it before finding)", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }

        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug($n, "find",1);
        }
        if (!$this->__table) {
            // xdebug can backtrace this!
            trigger_error("NO \$__table SPECIFIED in class definition",E_USER_ERROR);
        }
        $this->N = 0;
        $query_before = $this->_query;
        $this->_build_condition($this->table()) ;
        
        $quoteIdentifiers = !empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers']);
        $this->_connect();
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
       
        /* We are checking for method modifyLimitQuery as it is PEAR DB specific */
        $sql = 'SELECT ' .
            $this->_query['data_select'] . " \n" .
            ' FROM ' . ($quoteIdentifiers ? $DB->quoteIdentifier($this->__table) : $this->__table) . " \n" .
            $this->_join . " \n" .
            $this->_query['condition'] . " \n" .
            $this->_query['group_by']  . " \n" .
            $this->_query['having']    . " \n" .
            $this->_query['order_by']  . " \n";
        
        if ((!isset($_DB_DATAOBJECT['CONFIG']['db_driver'])) || 
            ($_DB_DATAOBJECT['CONFIG']['db_driver'] == 'DB')) {
            /* PEAR DB specific */
        
            if (isset($this->_query['limit_start']) && strlen($this->_query['limit_start'] . $this->_query['limit_count'])) {
                $sql = $DB->modifyLimitQuery($sql,$this->_query['limit_start'], $this->_query['limit_count']);
            }
        } else {
            /* theoretically MDB2! */
            if (isset($this->_query['limit_start']) && strlen($this->_query['limit_start'] . $this->_query['limit_count'])) {
	            $DB->setLimit($this->_query['limit_count'],$this->_query['limit_start']);
	        }
        }
        
        
        $this->_query($sql);
        
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("CHECK autofetchd $n", "find", 1);
        }
        
        // find(true)
        
        $ret = $this->N;
        if (!$ret && !empty($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid])) {     
            // clear up memory if nothing found!?
            unset($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid]);
        }
        
        if ($n && $this->N > 0 ) {
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                $this->debug("ABOUT TO AUTOFETCH", "find", 1);
            }
            $fs = $this->fetch();
            // if fetch returns false (eg. failed), then the backend doesnt support numRows (eg. ret=true)
            // - hence find() also returns false..
            $ret = ($ret === true) ? $fs : $ret;
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("DONE", "find", 1);
        }
        $this->_query = $query_before;
        return $ret;
    }

    /**
     * fetches next row into this objects var's
     *
     * returns 1 on success 0 on failure
     *
     *
     *
     * Example
     * $object = new mytable();
     * $object->name = "fred";
     * $object->find();
     * $store = array();
     * while ($object->fetch()) {
     *   echo $this->ID;
     *   $store[] = $object; // builds an array of object lines.
     * }
     *
     * to add features to a fetch
     * function fetch () {
     *    $ret = parent::fetch();
     *    $this->date_formated = date('dmY',$this->date);
     *    return $ret;
     * }
     *
     * @access  public
     * @return  boolean on success
     */
    function fetch()
    {

        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        if (empty($this->N)) {
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                $this->debug("No data returned from FIND (eg. N is 0)","FETCH", 3);
            }
            return false;
        }
        
        if (empty($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid]) || 
            !is_object($result = &$_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid])) 
        {
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                $this->debug('fetched on object after fetch completed (no results found)');
            }
            return false;
        }
        
        
        $array = $result->fetchRow(DB_DATAOBJECT_FETCHMODE_ASSOC);
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug(serialize($array),"FETCH");
        }
        
        // fetched after last row..
        if ($array === null) {
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                $t= explode(' ',microtime());
            
                $this->debug("Last Data Fetch'ed after " . 
                        ($t[0]+$t[1]- $_DB_DATAOBJECT['QUERYENDTIME']  ) . 
                        " seconds",
                    "FETCH", 1);
            }
            // reduce the memory usage a bit... (but leave the id in, so count() works ok on it)
            unset($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid]);
            
            // we need to keep a copy of resultfields locally so toArray() still works
            // however we dont want to keep it in the global cache..
            
            if (!empty($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid])) {
                $this->_resultFields = $_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid];
                unset($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid]);
            }
            // this is probably end of data!!
            //DB_DataObject::raiseError("fetch: no data returned", DB_DATAOBJECT_ERROR_NODATA);
            return false;
        }
        // make sure resultFields is always empty..
        $this->_resultFields = false;
        
        if (!isset($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid])) {
            // note: we dont declare this to keep the print_r size down.
            $_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid]= array_flip(array_keys($array));
        }
        
        foreach($array as $k=>$v) {
            $kk = str_replace(".", "_", $k);
            $kk = str_replace(" ", "_", $kk);
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                $this->debug("$kk = ". $array[$k], "fetchrow LINE", 3);
            }
            $this->$kk = $array[$k];
        }
        
        // set link flag
        $this->_link_loaded=false;
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("{$this->__table} DONE", "fetchrow",2);
        }
        if (($this->_query !== false) &&  empty($_DB_DATAOBJECT['CONFIG']['keep_query_after_fetch'])) {
            $this->_query = false;
        }
        return true;
    }

    /**
     * Adds a condition to the WHERE statement, defaults to AND
     *
     * $object->whereAdd(); //reset or cleaer ewhwer
     * $object->whereAdd("ID > 20");
     * $object->whereAdd("age > 20","OR");
     *
     * @param    string  $cond  condition
     * @param    string  $logic optional logic "OR" (defaults to "AND")
     * @access   public
     * @return   string|PEAR::Error - previous condition or Error when invalid args found
     */
    function whereAdd($cond = false, $logic = 'AND')
    {
        // for PHP5.2.3 - there is a bug with setting array properties of an object.
        $_query = $this->_query;
         
        if (!isset($this->_query) || ($_query === false)) {
            return $this->raiseError(
                "You cannot do two queries on the same object (clone it before finding)", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
        }
        
        if ($cond === false) {
            $r = $this->_query['condition'];
            $_query['condition'] = '';
            $this->_query = $_query;
            return preg_replace('/^\s+WHERE\s+/','',$r);
        }
        // check input...= 0 or '   ' == error!
        if (!trim($cond)) {
            return $this->raiseError("WhereAdd: No Valid Arguments", DB_DATAOBJECT_ERROR_INVALIDARGS);
        }
        $r = $_query['condition'];
        if ($_query['condition']) {
            $_query['condition'] .= " {$logic} ( {$cond} )";
            $this->_query = $_query;
            return $r;
        }
        $_query['condition'] = " WHERE ( {$cond} ) ";
        $this->_query = $_query;
        return $r;
    }

    /**
     * Adds a order by condition
     *
     * $object->orderBy(); //clears order by
     * $object->orderBy("ID");
     * $object->orderBy("ID,age");
     *
     * @param  string $order  Order
     * @access public
     * @return none|PEAR::Error - invalid args only
     */
    function orderBy($order = false)
    {
        if ($this->_query === false) {
            $this->raiseError(
                "You cannot do two queries on the same object (copy it before finding)", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        if ($order === false) {
            $this->_query['order_by'] = '';
            return;
        }
        // check input...= 0 or '    ' == error!
        if (!trim($order)) {
            return $this->raiseError("orderBy: No Valid Arguments", DB_DATAOBJECT_ERROR_INVALIDARGS);
        }
        
        if (!$this->_query['order_by']) {
            $this->_query['order_by'] = " ORDER BY {$order} ";
            return;
        }
        $this->_query['order_by'] .= " , {$order}";
    }

    /**
     * Adds a group by condition
     *
     * $object->groupBy(); //reset the grouping
     * $object->groupBy("ID DESC");
     * $object->groupBy("ID,age");
     *
     * @param  string  $group  Grouping
     * @access public
     * @return none|PEAR::Error - invalid args only
     */
    function groupBy($group = false)
    {
        if ($this->_query === false) {
            $this->raiseError(
                "You cannot do two queries on the same object (copy it before finding)", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        if ($group === false) {
            $this->_query['group_by'] = '';
            return;
        }
        // check input...= 0 or '    ' == error!
        if (!trim($group)) {
            return $this->raiseError("groupBy: No Valid Arguments", DB_DATAOBJECT_ERROR_INVALIDARGS);
        }
        
        
        if (!$this->_query['group_by']) {
            $this->_query['group_by'] = " GROUP BY {$group} ";
            return;
        }
        $this->_query['group_by'] .= " , {$group}";
    }

    /**
     * Adds a having clause
     *
     * $object->having(); //reset the grouping
     * $object->having("sum(value) > 0 ");
     *
     * @param  string  $having  condition
     * @access public
     * @return none|PEAR::Error - invalid args only
     */
    function having($having = false)
    {
        if ($this->_query === false) {
            $this->raiseError(
                "You cannot do two queries on the same object (copy it before finding)", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        if ($having === false) {
            $this->_query['having'] = '';
            return;
        }
        // check input...= 0 or '    ' == error!
        if (!trim($having)) {
            return $this->raiseError("Having: No Valid Arguments", DB_DATAOBJECT_ERROR_INVALIDARGS);
        }
        
        
        if (!$this->_query['having']) {
            $this->_query['having'] = " HAVING {$having} ";
            return;
        }
        $this->_query['having'] .= " AND {$having}";
    }

    /**
     * Sets the Limit
     *
     * $boject->limit(); // clear limit
     * $object->limit(12);
     * $object->limit(12,10);
     *
     * Note this will emit an error on databases other than mysql/postgress
     * as there is no 'clean way' to implement it. - you should consider refering to
     * your database manual to decide how you want to implement it.
     *
     * @param  string $a  limit start (or number), or blank to reset
     * @param  string $b  number
     * @access public
     * @return none|PEAR::Error - invalid args only
     */
    function limit($a = null, $b = null)
    {
        if ($this->_query === false) {
            $this->raiseError(
                "You cannot do two queries on the same object (copy it before finding)", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        
        if ($a === null) {
           $this->_query['limit_start'] = '';
           $this->_query['limit_count'] = '';
           return;
        }
        // check input...= 0 or '    ' == error!
        if ((!is_int($a) && ((string)((int)$a) !== (string)$a)) 
            || (($b !== null) && (!is_int($b) && ((string)((int)$b) !== (string)$b)))) {
            return $this->raiseError("limit: No Valid Arguments", DB_DATAOBJECT_ERROR_INVALIDARGS);
        }
        global $_DB_DATAOBJECT;
        $this->_connect();
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
        
        $this->_query['limit_start'] = ($b == null) ? 0 : (int)$a;
        $this->_query['limit_count'] = ($b == null) ? (int)$a : (int)$b;
        
    }

    /**
     * Adds a select columns
     *
     * $object->selectAdd(); // resets select to nothing!
     * $object->selectAdd("*"); // default select
     * $object->selectAdd("unixtime(DATE) as udate");
     * $object->selectAdd("DATE");
     *
     * to prepend distict:
     * $object->selectAdd('distinct ' . $object->selectAdd());
     *
     * @param  string  $k
     * @access public
     * @return mixed null or old string if you reset it.
     */
    function selectAdd($k = null)
    {
        if ($this->_query === false) {
            $this->raiseError(
                "You cannot do two queries on the same object (copy it before finding)", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        if ($k === null) {
            $old = $this->_query['data_select'];
            $this->_query['data_select'] = '';
            return $old;
        }
        
        // check input...= 0 or '    ' == error!
        if (!trim($k)) {
            return $this->raiseError("selectAdd: No Valid Arguments", DB_DATAOBJECT_ERROR_INVALIDARGS);
        }
        
        if ($this->_query['data_select']) {
            $this->_query['data_select'] .= ', ';
        }
        $this->_query['data_select'] .= " $k ";
    }
    /**
     * Adds multiple Columns or objects to select with formating.
     *
     * $object->selectAs(null); // adds "table.colnameA as colnameA,table.colnameB as colnameB,......"
     *                      // note with null it will also clear the '*' default select
     * $object->selectAs(array('a','b'),'%s_x'); // adds "a as a_x, b as b_x"
     * $object->selectAs(array('a','b'),'ddd_%s','ccc'); // adds "ccc.a as ddd_a, ccc.b as ddd_b"
     * $object->selectAdd($object,'prefix_%s'); // calls $object->get_table and adds it all as
     *                  objectTableName.colnameA as prefix_colnameA
     *
     * @param  array|object|null the array or object to take column names from.
     * @param  string           format in sprintf format (use %s for the colname)
     * @param  string           table name eg. if you have joinAdd'd or send $from as an array.
     * @access public
     * @return void
     */
    function selectAs($from = null,$format = '%s',$tableName=false)
    {
        global $_DB_DATAOBJECT;
        
        if ($this->_query === false) {
            $this->raiseError(
                "You cannot do two queries on the same object (copy it before finding)", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        
        if ($from === null) {
            // blank the '*' 
            $this->selectAdd();
            $from = $this;
        }
        
        
        $table = $this->__table;
        if (is_object($from)) {
            $table = $from->__table;
            $from = array_keys($from->table());
        }
        
        if ($tableName !== false) {
            $table = $tableName;
        }
        $s = '%s';
        if (!empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers'])) {
            $this->_connect();
            $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
            $s      = $DB->quoteIdentifier($s);
            $format = $DB->quoteIdentifier($format); 
        }
        foreach ($from as $k) {
            $this->selectAdd(sprintf("{$s}.{$s} as {$format}",$table,$k,$k));
        }
        $this->_query['data_select'] .= "\n";
    }
    /**
     * Insert the current objects variables into the database
     *
     * Returns the ID of the inserted element (if auto increment or sequences are used.)
     *
     * for example
     *
     * Designed to be extended
     *
     * $object = new mytable();
     * $object->name = "fred";
     * echo $object->insert();
     *
     * @access public
     * @return mixed false on failure, int when auto increment or sequence used, otherwise true on success
     */
    function insert()
    {
        global $_DB_DATAOBJECT;
        
        // we need to write to the connection (For nextid) - so us the real
        // one not, a copyied on (as ret-by-ref fails with overload!)
        
        if (!isset($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            $this->_connect();
        }
        
        $quoteIdentifiers  = !empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers']);
        
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
         
        $items =  isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table]) ?   
            $_DB_DATAOBJECT['INI'][$this->_database][$this->__table] : $this->table();
            
        if (!$items) {
            $this->raiseError("insert:No table definition for {$this->__table}",
                DB_DATAOBJECT_ERROR_INVALIDCONFIG);
            return false;
        }
        $options = &$_DB_DATAOBJECT['CONFIG'];


        $datasaved = 1;
        $leftq     = '';
        $rightq    = '';
     
        $seqKeys   = isset($_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table]) ?
                        $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] : 
                        $this->sequenceKey();
        
        $key       = isset($seqKeys[0]) ? $seqKeys[0] : false;
        $useNative = isset($seqKeys[1]) ? $seqKeys[1] : false;
        $seq       = isset($seqKeys[2]) ? $seqKeys[2] : false;
        
        $dbtype    = $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn["phptype"];
        
         
        // nativeSequences or Sequences..     

        // big check for using sequences
        
        if (($key !== false) && !$useNative) { 
        
            if (!$seq) {
                $keyvalue =  $DB->nextId($this->__table);
            } else {
                $f = $DB->getOption('seqname_format');
                $DB->setOption('seqname_format','%s');
                $keyvalue =  $DB->nextId($seq);
                $DB->setOption('seqname_format',$f);
            }
            if (PEAR::isError($keyvalue)) {
                $this->raiseError($keyvalue->toString(), DB_DATAOBJECT_ERROR_INVALIDCONFIG);
                return false;
            }
            $this->$key = $keyvalue;
        }



        foreach($items as $k => $v) {
            
            // if we are using autoincrement - skip the column...
            if ($key && ($k == $key) && $useNative) {
                continue;
            }
        
            
            if (!isset($this->$k)) {
                continue;
            }
            // dont insert data into mysql timestamps 
            // use query() if you really want to do this!!!!
            if ($v & DB_DATAOBJECT_MYSQLTIMESTAMP) {
                continue;
            }
            
            if ($leftq) {
                $leftq  .= ', ';
                $rightq .= ', ';
            }
            
            $leftq .= ($quoteIdentifiers ? ($DB->quoteIdentifier($k) . ' ')  : "$k ");
            
            if (is_a($this->$k,'DB_DataObject_Cast')) {
                $value = $this->$k->toString($v,$DB);
                if (PEAR::isError($value)) {
                    $this->raiseError($value->toString() ,DB_DATAOBJECT_ERROR_INVALIDARGS);
                    return false;
                }
                $rightq .=  $value;
                continue;
            }
            
            

            if (!isset($options['disable_null_strings']) && is_string($this->$k) && (strtolower($this->$k) === 'null') && !($v & DB_DATAOBJECT_NOTNULL)) {
                $rightq .= " NULL ";
                continue;
            }
            // DATE is empty... on a col. that can be null.. 
            // note: this may be usefull for time as well..
            if (!$this->$k && 
                    (($v & DB_DATAOBJECT_DATE) || ($v & DB_DATAOBJECT_TIME)) && 
                    !($v & DB_DATAOBJECT_NOTNULL)) {
                    
                $rightq .= " NULL ";
                continue;
            }
              
            
            if ($v & DB_DATAOBJECT_STR) {
                $rightq .= $this->_quote((string) (
                        ($v & DB_DATAOBJECT_BOOL) ? 
                            // this is thanks to the braindead idea of postgres to 
                            // use t/f for boolean.
                            (($this->$k === 'f') ? 0 : (int)(bool) $this->$k) :  
                            $this->$k
                    )) . " ";
                continue;
            }
            if (is_numeric($this->$k)) {
                $rightq .=" {$this->$k} ";
                continue;
            }
            /* flag up string values - only at debug level... !!!??? */
            if (is_object($this->$k) || is_array($this->$k)) {
                $this->debug('ODD DATA: ' .$k . ' ' .  print_r($this->$k,true),'ERROR');
            }
            
            // at present we only cast to integers
            // - V2 may store additional data about float/int
            $rightq .= ' ' . intval($this->$k) . ' ';

        }
        
        // not sure why we let empty insert here.. - I guess to generate a blank row..
        
        
        if ($leftq || $useNative) {
            $table = ($quoteIdentifiers ? $DB->quoteIdentifier($this->__table)    : $this->__table);
            
            
            if (($dbtype == 'pgsql') && empty($leftq)) {
                $r = $this->_query("INSERT INTO {$table} DEFAULT VALUES");
            } else {
               $r = $this->_query("INSERT INTO {$table} ($leftq) VALUES ($rightq) ");
            }
            
 
            
            
            if (PEAR::isError($r)) {
                $this->raiseError($r);
                return false;
            }
            
            if ($r < 1) {
                return 0;
            }
            
            
            // now do we have an integer key!
            
            if ($key && $useNative) {
                switch ($dbtype) {
                    case 'mysql':
                    case 'mysqli':
                        $method = "{$dbtype}_insert_id";
                        $this->$key = $method(
                            $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->connection
                        );
                        break;
                    
                    case 'mssql':
                        // note this is not really thread safe - you should wrapp it with 
                        // transactions = eg.
                        // $db->query('BEGIN');
                        // $db->insert();
                        // $db->query('COMMIT');
                        $db_driver = empty($options['db_driver']) ? 'DB' : $options['db_driver'];
                        $method = ($db_driver  == 'DB') ? 'getOne' : 'queryOne';
                        $mssql_key = $DB->$method("SELECT @@IDENTITY");
                        if (PEAR::isError($mssql_key)) {
                            $this->raiseError($mssql_key);
                            return false;
                        }
                        $this->$key = $mssql_key;
                        break; 
                        
                    case 'pgsql':
                        if (!$seq) {
                            $seq = $DB->getSequenceName(strtolower($this->__table));
                        }
                        $db_driver = empty($options['db_driver']) ? 'DB' : $options['db_driver'];
                        $method = ($db_driver  == 'DB') ? 'getOne' : 'queryOne';
                        $pgsql_key = $DB->$method("SELECT currval('".$seq . "')"); 


                        if (PEAR::isError($pgsql_key)) {
                            $this->raiseError($pgsql_key);
                            return false;
                        }
                        $this->$key = $pgsql_key;
                        break;
                    
                    case 'ifx':
                        $this->$key = array_shift (
                            ifx_fetch_row (
                                ifx_query(
                                    "select DBINFO('sqlca.sqlerrd1') FROM systables where tabid=1",
                                    $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->connection,
                                    IFX_SCROLL
                                ), 
                                "FIRST"
                            )
                        ); 
                        break;
                    
                }
                        
            }

            if (isset($_DB_DATAOBJECT['CACHE'][strtolower(get_class($this))])) {
                $this->_clear_cache();
            }
            if ($key) {
                return $this->$key;
            }
            return true;
        }
        $this->raiseError("insert: No Data specifed for query", DB_DATAOBJECT_ERROR_NODATA);
        return false;
    }

    /**
     * Updates  current objects variables into the database
     * uses the keys() to decide how to update
     * Returns the  true on success
     *
     * for example
     *
     * $object = DB_DataObject::factory('mytable');
     * $object->get("ID",234);
     * $object->email="testing@test.com";
     * if(!$object->update())
     *   echo "UPDATE FAILED";
     *
     * to only update changed items :
     * $dataobject->get(132);
     * $original = $dataobject; // clone/copy it..
     * $dataobject->setFrom($_POST);
     * if ($dataobject->validate()) {
     *    $dataobject->update($original);
     * } // otherwise an error...
     *
     * performing global updates:
     * $object = DB_DataObject::factory('mytable');
     * $object->status = "dead";
     * $object->whereAdd('age > 150');
     * $object->update(DB_DATAOBJECT_WHEREADD_ONLY);
     *
     * @param object dataobject (optional) | DB_DATAOBJECT_WHEREADD_ONLY - used to only update changed items.
     * @access public
     * @return  int rows affected or false on failure
     */
    function update($dataObject = false)
    {
        global $_DB_DATAOBJECT;
        // connect will load the config!
        $this->_connect();
        
        
        $original_query =  $this->_query;
        
        $items =  isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table]) ?   
            $_DB_DATAOBJECT['INI'][$this->_database][$this->__table] : $this->table();
        
        // only apply update against sequence key if it is set?????
        
        $seq    = $this->sequenceKey();
        if ($seq[0] !== false) {
            $keys = array($seq[0]);
            if (empty($this->{$keys[0]}) && $dataObject !== true) {
                $this->raiseError("update: trying to perform an update without 
                        the key set, and argument to update is not 
                        DB_DATAOBJECT_WHEREADD_ONLY
                    ", DB_DATAOBJECT_ERROR_INVALIDARGS);
                return false;  
            }
        } else {
            $keys = $this->keys();
        }
        
         
        if (!$items) {
            $this->raiseError("update:No table definition for {$this->__table}", DB_DATAOBJECT_ERROR_INVALIDCONFIG);
            return false;
        }
        $datasaved = 1;
        $settings  = '';
        $this->_connect();
        
        $DB            = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
        $dbtype        = $DB->dsn["phptype"];
        $quoteIdentifiers = !empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers']);
        $options = $_DB_DATAOBJECT['CONFIG'];
        
        
        foreach($items as $k => $v) {
            if (!isset($this->$k)) {
                continue;
            }
            // ignore stuff thats 
          
            // dont write things that havent changed..
            if (($dataObject !== false) && isset($dataObject->$k) && ($dataObject->$k === $this->$k)) {
                continue;
            }
            
            // - dont write keys to left.!!!
            if (in_array($k,$keys)) {
                continue;
            }
            
             // dont insert data into mysql timestamps 
            // use query() if you really want to do this!!!!
            if ($v & DB_DATAOBJECT_MYSQLTIMESTAMP) {
                continue;
            }
            
            
            if ($settings)  {
                $settings .= ', ';
            }
            
            $kSql = ($quoteIdentifiers ? $DB->quoteIdentifier($k) : $k);
            
            if (is_a($this->$k,'DB_DataObject_Cast')) {
                $value = $this->$k->toString($v,$DB);
                if (PEAR::isError($value)) {
                    $this->raiseError($value->getMessage() ,DB_DATAOBJECT_ERROR_INVALIDARG);
                    return false;
                }
                $settings .= "$kSql = $value ";
                continue;
            }
            
            // special values ... at least null is handled...
            if (!isset($options['disable_null_strings']) && (strtolower($this->$k) === 'null') && !($v & DB_DATAOBJECT_NOTNULL)) {
                $settings .= "$kSql = NULL ";
                continue;
            }
            // DATE is empty... on a col. that can be null.. 
            // note: this may be usefull for time as well..
            if (!$this->$k && 
                    (($v & DB_DATAOBJECT_DATE) || ($v & DB_DATAOBJECT_TIME)) && 
                    !($v & DB_DATAOBJECT_NOTNULL)) {
                    
                $settings .= "$kSql = NULL ";
                continue;
            }
            

            if ($v & DB_DATAOBJECT_STR) {
                $settings .= "$kSql = ". $this->_quote((string) (
                        ($v & DB_DATAOBJECT_BOOL) ? 
                            // this is thanks to the braindead idea of postgres to 
                            // use t/f for boolean.
                            (($this->$k === 'f') ? 0 : (int)(bool) $this->$k) :  
                            $this->$k
                    )) . ' ';
                continue;
            }
            if (is_numeric($this->$k)) {
                $settings .= "$kSql = {$this->$k} ";
                continue;
            }
            // at present we only cast to integers
            // - V2 may store additional data about float/int
            $settings .= "$kSql = " . intval($this->$k) . ' ';
        }

        
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("got keys as ".serialize($keys),3);
        }
        if ($dataObject !== true) {
            $this->_build_condition($items,$keys);
        } else {
            // prevent wiping out of data!
            if (empty($this->_query['condition'])) {
                 $this->raiseError("update: global table update not available
                        do \$do->whereAdd('1=1'); if you really want to do that.
                    ", DB_DATAOBJECT_ERROR_INVALIDARGS);
                return false;
            }
        }
        
        
        
        //  echo " $settings, $this->condition ";
        if ($settings && isset($this->_query) && $this->_query['condition']) {
            
            $table = ($quoteIdentifiers ? $DB->quoteIdentifier($this->__table) : $this->__table);
        
            $r = $this->_query("UPDATE  {$table}  SET {$settings} {$this->_query['condition']} ");
            
            // restore original query conditions.
            $this->_query = $original_query;
            
            if (PEAR::isError($r)) {
                $this->raiseError($r);
                return false;
            }
            if ($r < 1) {
                return 0;
            }

            $this->_clear_cache();
            return $r;
        }
        // restore original query conditions.
        $this->_query = $original_query;
        
        // if you manually specified a dataobject, and there where no changes - then it's ok..
        if ($dataObject !== false) {
            return true;
        }
        
        $this->raiseError(
            "update: No Data specifed for query $settings , {$this->_query['condition']}", 
            DB_DATAOBJECT_ERROR_NODATA);
        return false;
    }

    /**
     * Deletes items from table which match current objects variables
     *
     * Returns the true on success
     *
     * for example
     *
     * Designed to be extended
     *
     * $object = new mytable();
     * $object->ID=123;
     * echo $object->delete(); // builds a conditon
     *
     * $object = new mytable();
     * $object->whereAdd('age > 12');
     * $object->limit(1);
     * $object->orderBy('age DESC');
     * $object->delete(true); // dont use object vars, use the conditions, limit and order.
     *
     * @param bool $useWhere (optional) If DB_DATAOBJECT_WHEREADD_ONLY is passed in then
     *             we will build the condition only using the whereAdd's.  Default is to
     *             build the condition only using the object parameters.
     *
     * @access public
     * @return mixed Int (No. of rows affected) on success, false on failure, 0 on no data affected
     */
    function delete($useWhere = false)
    {
        global $_DB_DATAOBJECT;
        // connect will load the config!
        $this->_connect();
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
        $quoteIdentifiers  = !empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers']);
        
        $extra_cond = ' ' . (isset($this->_query['order_by']) ? $this->_query['order_by'] : ''); 
        
        if (!$useWhere) {

            $keys = $this->keys();
            $this->_query = array(); // as it's probably unset!
            $this->_query['condition'] = ''; // default behaviour not to use where condition
            $this->_build_condition($this->table(),$keys);
            // if primary keys are not set then use data from rest of object.
            if (!$this->_query['condition']) {
                $this->_build_condition($this->table(),array(),$keys);
            }
            $extra_cond = '';
        } 
            

        // don't delete without a condition
        if (($this->_query !== false) && $this->_query['condition']) {
        
            $table = ($quoteIdentifiers ? $DB->quoteIdentifier($this->__table) : $this->__table);
            $sql = "DELETE ";
            // using a joined delete. - with useWhere..
            $sql .= (!empty($this->_join) && $useWhere) ? 
                "{$table} FROM {$table} {$this->_join} " : 
                "FROM {$table} ";
                
            $sql .= $this->_query['condition']. $extra_cond;
            
            // add limit..
            
            if (isset($this->_query['limit_start']) && strlen($this->_query['limit_start'] . $this->_query['limit_count'])) {
                
                if (!isset($_DB_DATAOBJECT['CONFIG']['db_driver']) ||  
                    ($_DB_DATAOBJECT['CONFIG']['db_driver'] == 'DB')) {
                    // pear DB 
                    $sql = $DB->modifyLimitQuery($sql,$this->_query['limit_start'], $this->_query['limit_count']);
                    
                } else {
                    // MDB2
                    $DB->setLimit( $this->_query['limit_count'],$this->_query['limit_start']);
                }
                    
            }
            
            
            $r = $this->_query($sql);
            
            
            if (PEAR::isError($r)) {
                $this->raiseError($r);
                return false;
            }
            if ($r < 1) {
                return 0;
            }
            $this->_clear_cache();
            return $r;
        } else {
            $this->raiseError("delete: No condition specifed for query", DB_DATAOBJECT_ERROR_NODATA);
            return false;
        }
    }

    /**
     * fetches a specific row into this object variables
     *
     * Not recommended - better to use fetch()
     *
     * Returens true on success
     *
     * @param  int   $row  row
     * @access public
     * @return boolean true on success
     */
    function fetchRow($row = null)
    {
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            $this->_loadConfig();
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("{$this->__table} $row of {$this->N}", "fetchrow",3);
        }
        if (!$this->__table) {
            $this->raiseError("fetchrow: No table", DB_DATAOBJECT_ERROR_INVALIDCONFIG);
            return false;
        }
        if ($row === null) {
            $this->raiseError("fetchrow: No row specified", DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        if (!$this->N) {
            $this->raiseError("fetchrow: No results avaiable", DB_DATAOBJECT_ERROR_NODATA);
            return false;
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("{$this->__table} $row of {$this->N}", "fetchrow",3);
        }


        $result = &$_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid];
        $array  = $result->fetchrow(DB_DATAOBJECT_FETCHMODE_ASSOC,$row);
        if (!is_array($array)) {
            $this->raiseError("fetchrow: No results available", DB_DATAOBJECT_ERROR_NODATA);
            return false;
        }

        foreach($array as $k => $v) {
            $kk = str_replace(".", "_", $k);
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                $this->debug("$kk = ". $array[$k], "fetchrow LINE", 3);
            }
            $this->$kk = $array[$k];
        }

        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("{$this->__table} DONE", "fetchrow", 3);
        }
        return true;
    }

    /**
     * Find the number of results from a simple query
     *
     * for example
     *
     * $object = new mytable();
     * $object->name = "fred";
     * echo $object->count();
     * echo $object->count(true);  // dont use object vars.
     * echo $object->count('distinct mycol');   count distinct mycol.
     * echo $object->count('distinct mycol',true); // dont use object vars.
     * echo $object->count('distinct');      // count distinct id (eg. the primary key)
     *
     *
     * @param bool|string  (optional)
     *                  (true|false => see below not on whereAddonly)
     *                  (string)
     *                      "DISTINCT" => does a distinct count on the tables 'key' column
     *                      otherwise  => normally it counts primary keys - you can use 
     *                                    this to do things like $do->count('distinct mycol');
     *                  
     * @param bool      $whereAddOnly (optional) If DB_DATAOBJECT_WHEREADD_ONLY is passed in then
     *                  we will build the condition only using the whereAdd's.  Default is to
     *                  build the condition using the object parameters as well.
     *                  
     * @access public
     * @return int
     */
    function count($countWhat = false,$whereAddOnly = false)
    {
        global $_DB_DATAOBJECT;
        
        if (is_bool($countWhat)) {
            $whereAddOnly = $countWhat;
        }
        
        $t = clone($this);
        $items   = $t->table();
        
        $quoteIdentifiers = !empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers']);
        
        
        if (!isset($t->_query)) {
            $this->raiseError(
                "You cannot do run count after you have run fetch()", 
                DB_DATAOBJECT_ERROR_INVALIDARGS);
            return false;
        }
        $this->_connect();
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
       

        if (!$whereAddOnly && $items)  {
            $t->_build_condition($items);
        }
        $keys = $this->keys();

        if (empty($keys[0]) && (!is_string($countWhat) || (strtoupper($countWhat) == 'DISTINCT'))) {
            $this->raiseError(
                "You cannot do run count without keys - use \$do->count('id'), or use \$do->count('distinct id')';", 
                DB_DATAOBJECT_ERROR_INVALIDARGS,PEAR_ERROR_DIE);
            return false;
            
        }
        $table   = ($quoteIdentifiers ? $DB->quoteIdentifier($this->__table) : $this->__table);
        $key_col = empty($keys[0]) ? '' : (($quoteIdentifiers ? $DB->quoteIdentifier($keys[0]) : $keys[0]));
        $as      = ($quoteIdentifiers ? $DB->quoteIdentifier('DATAOBJECT_NUM') : 'DATAOBJECT_NUM');
        
        // support distinct on default keys.
        $countWhat = (strtoupper($countWhat) == 'DISTINCT') ? 
            "DISTINCT {$table}.{$key_col}" : $countWhat;
        
        $countWhat = is_string($countWhat) ? $countWhat : "{$table}.{$key_col}";
        
        $r = $t->_query(
            "SELECT count({$countWhat}) as $as
                FROM $table {$t->_join} {$t->_query['condition']}");
        if (PEAR::isError($r)) {
            return false;
        }
         
        $result  = &$_DB_DATAOBJECT['RESULTS'][$t->_DB_resultid];
        $l = $result->fetchRow(DB_DATAOBJECT_FETCHMODE_ORDERED);
        // free the results - essential on oracle.
        $t->free();
        
        return (int) $l[0];
    }

    /**
     * sends raw query to database
     *
     * Since _query has to be a private 'non overwriteable method', this is a relay
     *
     * @param  string  $string  SQL Query
     * @access public
     * @return void or DB_Error
     */
    function query($string)
    {
        return $this->_query($string);
    }


    /**
     * an escape wrapper around DB->escapeSimple()
     * can be used when adding manual queries or clauses
     * eg.
     * $object->query("select * from xyz where abc like '". $object->escape($_GET['name']) . "'");
     *
     * @param  string  $string  value to be escaped 
     * @param  bool $likeEscape  escapes % and _ as well. - so like queries can be protected.
     * @access public
     * @return string
     */
    function escape($string, $likeEscape=false)
    {
        global $_DB_DATAOBJECT;
        $this->_connect();
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
        // mdb2 uses escape...
        $dd = empty($_DB_DATAOBJECT['CONFIG']['db_driver']) ? 'DB' : $_DB_DATAOBJECT['CONFIG']['db_driver'];
        $ret = ($dd == 'DB') ? $DB->escapeSimple($string) : $DB->escape($string);
        if ($likeEscape) {
            $ret = str_replace(array('_','%'), array('\_','\%'), $ret);
        }
        return $ret;
        
    }

    /* ==================================================== */
    /*        Major Private Vars                            */
    /* ==================================================== */

    /**
     * The Database connection dsn (as described in the PEAR DB)
     * only used really if you are writing a very simple application/test..
     * try not to use this - it is better stored in configuration files..
     *
     * @access  private
     * @var     string
     */
    var $_database_dsn = '';

    /**
     * The Database connection id (md5 sum of databasedsn)
     *
     * @access  private
     * @var     string
     */
    var $_database_dsn_md5 = '';

    /**
     * The Database name
     * created in __connection
     *
     * @access  private
     * @var  string
     */
    var $_database = '';

    
    
    /**
     * The QUERY rules
     * This replaces alot of the private variables 
     * used to build a query, it is unset after find() is run.
     * 
     *
     *
     * @access  private
     * @var     array
     */
    var $_query = array(
        'condition'   => '', // the WHERE condition
        'group_by'    => '', // the GROUP BY condition
        'order_by'    => '', // the ORDER BY condition
        'having'      => '', // the HAVING condition
        'limit_start' => '', // the LIMIT condition
        'limit_count' => '', // the LIMIT condition
        'data_select' => '*', // the columns to be SELECTed
    );
        
    
  

    /**
     * Database result id (references global $_DB_DataObject[results]
     *
     * @access  private
     * @var     integer
     */
    var $_DB_resultid;
     
     /**
     * ResultFields - on the last call to fetch(), resultfields is sent here,
     * so we can clean up the memory.
     *
     * @access  public
     * @var     array
     */
    var $_resultFields = false; 


    /* ============================================================== */
    /*  Table definition layer (started of very private but 'came out'*/
    /* ============================================================== */

    /**
     * Autoload or manually load the table definitions
     *
     *
     * usage :
     * DB_DataObject::databaseStructure(  'databasename',
     *                                    parse_ini_file('mydb.ini',true), 
     *                                    parse_ini_file('mydb.link.ini',true)); 
     *
     * obviously you dont have to use ini files.. (just return array similar to ini files..)
     *  
     * It should append to the table structure array 
     *
     *     
     * @param optional string  name of database to assign / read
     * @param optional array   structure of database, and keys
     * @param optional array  table links
     *
     * @access public
     * @return true or PEAR:error on wrong paramenters.. or false if no file exists..
     *              or the array(tablename => array(column_name=>type)) if called with 1 argument.. (databasename)
     */
    function databaseStructure()
    {

        global $_DB_DATAOBJECT;
        
        // Assignment code 
        
        if ($args = func_get_args()) {
        
            if (count($args) == 1) {
                
                // this returns all the tables and their structure..
                if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                    $this->debug("Loading Generator as databaseStructure called with args",1);
                }
                
                $x = new DB_DataObject;
                $x->_database = $args[0];
                $this->_connect();
                $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
       
                $tables = $DB->getListOf('tables');
                class_exists('DB_DataObject_Generator') ? '' : 
                    require_once 'DB/DataObject/Generator.php';
                    
                foreach($tables as $table) {
                    $y = new DB_DataObject_Generator;
                    $y->fillTableSchema($x->_database,$table);
                }
                return $_DB_DATAOBJECT['INI'][$x->_database];            
            } else {
        
                $_DB_DATAOBJECT['INI'][$args[0]] = isset($_DB_DATAOBJECT['INI'][$args[0]]) ?
                    $_DB_DATAOBJECT['INI'][$args[0]] + $args[1] : $args[1];
                
                if (isset($args[1])) {
                    $_DB_DATAOBJECT['LINKS'][$args[0]] = isset($_DB_DATAOBJECT['LINKS'][$args[0]]) ?
                        $_DB_DATAOBJECT['LINKS'][$args[0]] + $args[2] : $args[2];
                }
                return true;
            }
          
        }
        
        
        
        if (!$this->_database) {
            $this->_connect();
        }
        
        // loaded already?
        if (!empty($_DB_DATAOBJECT['INI'][$this->_database])) {
            
            // database loaded - but this is table is not available..
            if (
                    empty($_DB_DATAOBJECT['INI'][$this->_database][$this->__table]) 
                    && !empty($_DB_DATAOBJECT['CONFIG']['proxy'])
                ) {
                if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                    $this->debug("Loading Generator to fetch Schema",1);
                }
                class_exists('DB_DataObject_Generator') ? '' : 
                    require_once 'DB/DataObject/Generator.php';
                    
                
                $x = new DB_DataObject_Generator;
                $x->fillTableSchema($this->_database,$this->__table);
            }
            return true;
        }
        
        
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        
        // if you supply this with arguments, then it will take those
        // as the database and links array...
         
        $schemas = isset($_DB_DATAOBJECT['CONFIG']['schema_location']) ?
            array("{$_DB_DATAOBJECT['CONFIG']['schema_location']}/{$this->_database}.ini") :
            array() ;
                 
        if (isset($_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"])) {
            $schemas = is_array($_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"]) ?
                $_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"] :
                explode(PATH_SEPARATOR,$_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"]);
        }
                    
         
        
        foreach ($schemas as $ini) {
             if (file_exists($ini) && is_file($ini)) {
                $_DB_DATAOBJECT['INI'][$this->_database] = parse_ini_file($ini, true);
                if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) { 
                    if (!is_readable ($ini)) {
                        $this->debug("ini file is not readable: $ini","databaseStructure",1);
                    } else {
                        $this->debug("Loaded ini file: $ini","databaseStructure",1);
                    }
                }
            } else {
                if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                    $this->debug("Missing ini file: $ini","databaseStructure",1);
                }
            }
             
        }
        // now have we loaded the structure.. 
        
        if (!empty($_DB_DATAOBJECT['INI'][$this->_database][$this->__table])) {
            return true;
        }
        // - if not try building it..
        if (!empty($_DB_DATAOBJECT['CONFIG']['proxy'])) {
            class_exists('DB_DataObject_Generator') ? '' : 
                require_once 'DB/DataObject/Generator.php';
                
            $x = new DB_DataObject_Generator;
            $x->fillTableSchema($this->_database,$this->__table);
            // should this fail!!!???
            return true;
        }
        $this->debug("Cant find database schema: {$this->_database}/{$this->__table} \n".
                    "in links file data: " . print_r($_DB_DATAOBJECT['INI'],true),"databaseStructure",5);
        // we have to die here!! - it causes chaos if we dont (including looping forever!)
        $this->raiseError( "Unable to load schema for database and table (turn debugging up to 5 for full error message)", DB_DATAOBJECT_ERROR_INVALIDARGS, PEAR_ERROR_DIE);
        return false;
        
         
    }




    /**
     * Return or assign the name of the current table
     *
     *
     * @param   string optinal table name to set
     * @access public
     * @return string The name of the current table
     */
    function tableName()
    {
        $args = func_get_args();
        if (count($args)) {
            $this->__table = $args[0];
        }
        return $this->__table;
    }
    
    /**
     * Return or assign the name of the current database
     *
     * @param   string optional database name to set
     * @access public
     * @return string The name of the current database
     */
    function database()
    {
        $args = func_get_args();
        if (count($args)) {
            $this->_database = $args[0];
        }
        return $this->_database;
    }
  
    /**
     * get/set an associative array of table columns
     *
     * @access public
     * @param  array key=>type array
     * @return array (associative)
     */
    function table()
    {
        
        // for temporary storage of database fields..
        // note this is not declared as we dont want to bloat the print_r output
        $args = func_get_args();
        if (count($args)) {
            $this->_database_fields = $args[0];
        }
        if (isset($this->_database_fields)) {
            return $this->_database_fields;
        }
        
        
        global $_DB_DATAOBJECT;
        if (!isset($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            $this->_connect();
        }
        
        if (isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table])) {
            return $_DB_DATAOBJECT['INI'][$this->_database][$this->__table];
        }
        
        $this->databaseStructure();
 
        
        $ret = array();
        if (isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table])) {
            $ret =  $_DB_DATAOBJECT['INI'][$this->_database][$this->__table];
        }
        
        return $ret;
    }

    /**
     * get/set an  array of table primary keys
     *
     * set usage: $do->keys('id','code');
     *
     * This is defined in the table definition if it gets it wrong,
     * or you do not want to use ini tables, you can override this.
     * @param  string optional set the key
     * @param  *   optional  set more keys
     * @access private
     * @return array
     */
    function keys()
    {
        // for temporary storage of database fields..
        // note this is not declared as we dont want to bloat the print_r output
        $args = func_get_args();
        if (count($args)) {
            $this->_database_keys = $args;
        }
        if (isset($this->_database_keys)) {
            return $this->_database_keys;
        }
        
        global $_DB_DATAOBJECT;
        if (!isset($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            $this->_connect();
        }
        if (isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"])) {
            return array_keys($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"]);
        }
        $this->databaseStructure();
        
        if (isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"])) {
            return array_keys($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"]);
        }
        return array();
    }
    /**
     * get/set an  sequence key
     *
     * by default it returns the first key from keys()
     * set usage: $do->sequenceKey('id',true);
     *
     * override this to return array(false,false) if table has no real sequence key.
     *
     * @param  string  optional the key sequence/autoinc. key
     * @param  boolean optional use native increment. default false 
     * @param  false|string optional native sequence name
     * @access private
     * @return array (column,use_native,sequence_name)
     */
    function sequenceKey()
    {
        global $_DB_DATAOBJECT;
          
        // call setting
        if (!$this->_database) {
            $this->_connect();
        }
        
        if (!isset($_DB_DATAOBJECT['SEQUENCE'][$this->_database])) {
            $_DB_DATAOBJECT['SEQUENCE'][$this->_database] = array();
        }

        
        $args = func_get_args();
        if (count($args)) {
            $args[1] = isset($args[1]) ? $args[1] : false;
            $args[2] = isset($args[2]) ? $args[2] : false;
            $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] = $args;
        }
        if (isset($_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table])) {
            return $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table];
        }
        // end call setting (eg. $do->sequenceKeys(a,b,c); )
        
       
        
        
        $keys = $this->keys();
        if (!$keys) {
            return $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] 
                = array(false,false,false);
        }
 

        $table =  isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table]) ?   
            $_DB_DATAOBJECT['INI'][$this->_database][$this->__table] : $this->table();
       
        $dbtype    = $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['phptype'];
        
        $usekey = $keys[0];
        
        
        
        $seqname = false;
        
        if (!empty($_DB_DATAOBJECT['CONFIG']['sequence_'.$this->__table])) {
            $usekey = $_DB_DATAOBJECT['CONFIG']['sequence_'.$this->__table];
            if (strpos($usekey,':') !== false) {
                list($usekey,$seqname) = explode(':',$usekey);
            }
        }  
        
        
        // if the key is not an integer - then it's not a sequence or native
        if (empty($table[$usekey]) || !($table[$usekey] & DB_DATAOBJECT_INT)) {
                return $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] = array(false,false,false);
        }
        
        
        if (!empty($_DB_DATAOBJECT['CONFIG']['ignore_sequence_keys'])) {
            $ignore =  $_DB_DATAOBJECT['CONFIG']['ignore_sequence_keys'];
            if (is_string($ignore) && (strtoupper($ignore) == 'ALL')) {
                return $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] = array(false,false,$seqname);
            }
            if (is_string($ignore)) {
                $ignore = $_DB_DATAOBJECT['CONFIG']['ignore_sequence_keys'] = explode(',',$ignore);
            }
            if (in_array($this->__table,$ignore)) {
                return $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] = array(false,false,$seqname);
            }
        }
        
        
        $realkeys = $_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"];
        
        // if you are using an old ini file - go back to old behaviour...
        if (is_numeric($realkeys[$usekey])) {
            $realkeys[$usekey] = 'N';
        }
        
        // multiple unique primary keys without a native sequence...
        if (($realkeys[$usekey] == 'K') && (count($keys) > 1)) {
            return $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] = array(false,false,$seqname);
        }
        // use native sequence keys...
        // technically postgres native here...
        // we need to get the new improved tabledata sorted out first.
        
        if (    in_array($dbtype , array('pgsql', 'mysql', 'mysqli', 'mssql', 'ifx')) && 
                ($table[$usekey] & DB_DATAOBJECT_INT) && 
                isset($realkeys[$usekey]) && ($realkeys[$usekey] == 'N')
                ) {
            return $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] = array($usekey,true,$seqname);
        }
        // if not a native autoinc, and we have not assumed all primary keys are sequence
        if (($realkeys[$usekey] != 'N') && 
            !empty($_DB_DATAOBJECT['CONFIG']['dont_use_pear_sequences'])) {
            return array(false,false,false);
        }
        // I assume it's going to try and be a nextval DB sequence.. (not native)
        return $_DB_DATAOBJECT['SEQUENCE'][$this->_database][$this->__table] = array($usekey,false,$seqname);
    }
    
    
    
    /* =========================================================== */
    /*  Major Private Methods - the core part!              */
    /* =========================================================== */

 
    
    /**
     * clear the cache values for this class  - normally done on insert/update etc.
     *
     * @access private
     * @return void
     */
    function _clear_cache()
    {
        global $_DB_DATAOBJECT;
        
        $class = strtolower(get_class($this));
        
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("Clearing Cache for ".$class,1);
        }
        
        if (!empty($_DB_DATAOBJECT['CACHE'][$class])) {
            unset($_DB_DATAOBJECT['CACHE'][$class]);
        }
    }

    
    /**
     * backend wrapper for quoting, as MDB2 and DB do it differently...
     *
     * @access private
     * @return string quoted
     */
    
    function _quote($str) 
    {
        global $_DB_DATAOBJECT;
        return (empty($_DB_DATAOBJECT['CONFIG']['db_driver']) || 
                ($_DB_DATAOBJECT['CONFIG']['db_driver'] == 'DB'))
            ? $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->quoteSmart($str)
            : $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->quote($str);
    }
    
    
    /**
     * connects to the database
     *
     *
     * TODO: tidy this up - This has grown to support a number of connection options like
     *  a) dynamic changing of ini file to change which database to connect to
     *  b) multi data via the table_{$table} = dsn ini option
     *  c) session based storage.
     *
     * @access private
     * @return true | PEAR::error
     */
    function _connect()
    {
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            $this->_loadConfig();
        }
        // Set database driver for reference 
        $db_driver = empty($_DB_DATAOBJECT['CONFIG']['db_driver']) ? 
                'DB' : $_DB_DATAOBJECT['CONFIG']['db_driver'];
        
        // is it already connected ?    
        if ($this->_database_dsn_md5 && !empty($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            
            // connection is an error...
            if (PEAR::isError($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
                return $this->raiseError(
                        $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->message,
                        $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->code, PEAR_ERROR_DIE
                );
                 
            }

            if (empty($this->_database)) {
                $this->_database = $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['database'];
                $hasGetDatabase = method_exists($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5], 'getDatabase');
                
                $this->_database = ($db_driver != 'DB' && $hasGetDatabase)  
                        ? $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->getDatabase() 
                        : $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['database'];

                
                
                if (($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['phptype'] == 'sqlite') 
                    && is_file($this->_database))  {
                    $this->_database = basename($this->_database);
                }
                if ($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['phptype'] == 'ibase')  {
                    $this->_database = substr(basename($this->_database), 0, -4);
                }
                
            }
            // theoretically we have a md5, it's listed in connections and it's not an error.
            // so everything is ok!
            return true;
            
        }

        // it's not currently connected!
        // try and work out what to use for the dsn !

        $options= &$_DB_DATAOBJECT['CONFIG'];
        // if the databse dsn dis defined in the object..
        $dsn = isset($this->_database_dsn) ? $this->_database_dsn : null;
        
        if (!$dsn) {
            if (!$this->_database) {
                $this->_database = isset($options["table_{$this->__table}"]) ? $options["table_{$this->__table}"] : null;
            }
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                $this->debug("Checking for database specific ini ('{$this->_database}') : database_{$this->_database} in options","CONNECT");
            }
            
            if ($this->_database && !empty($options["database_{$this->_database}"]))  {
                $dsn = $options["database_{$this->_database}"];
            } else if (!empty($options['database'])) {
                $dsn = $options['database'];
                  
            }
        }
        
        // if still no database...
        if (!$dsn) {
            return $this->raiseError(
                "No database name / dsn found anywhere",
                DB_DATAOBJECT_ERROR_INVALIDCONFIG, PEAR_ERROR_DIE
            );
                 
        }
        
        
        if (is_string($dsn)) {
            $this->_database_dsn_md5 = md5($dsn);
        } else {
            /// support array based dsn's
            $this->_database_dsn_md5 = md5(serialize($dsn));
        }

        if (!empty($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                $this->debug("USING CACHED CONNECTION", "CONNECT",3);
            }
            
            
            
            if (!$this->_database) {

                $hasGetDatabase = method_exists($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5], 'getDatabase');
                $this->_database = ($db_driver != 'DB' && $hasGetDatabase)  
                        ? $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->getDatabase() 
                        : $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['database'];
                
                if (($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['phptype'] == 'sqlite') 
                    && is_file($this->_database)) 
                {
                    $this->_database = basename($this->_database);
                }
            }
            return true;
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug("NEW CONNECTION TP DATABASE :" .$this->_database , "CONNECT",3);
            /* actualy make a connection */
            $this->debug(print_r($dsn,true) ." {$this->_database_dsn_md5}", "CONNECT",3);
        }
        
        // Note this is verbose deliberatly! 
        
        if ($db_driver == 'DB') {
            
            /* PEAR DB connect */
            
            // this allows the setings of compatibility on DB 
            $db_options = PEAR::getStaticProperty('DB','options');
            require_once 'DB.php';
            if ($db_options) {
                $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5] = &DB::connect($dsn,$db_options);
            } else {
                $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5] = &DB::connect($dsn);
            }
            
        } else {
            /* assumption is MDB2 */
            require_once 'MDB2.php';
            // this allows the setings of compatibility on MDB2 
            $db_options = PEAR::getStaticProperty('MDB2','options');
            $db_options = is_array($db_options) ? $db_options : array();
            $db_options['portability'] = isset($db_options['portability'] )
                ? $db_options['portability']  : MDB2_PORTABILITY_ALL ^ MDB2_PORTABILITY_FIX_CASE;
            $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5] = &MDB2::connect($dsn,$db_options);
            
        }
        
        
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug(serialize($_DB_DATAOBJECT['CONNECTIONS']), "CONNECT",5);
        }
        if (PEAR::isError($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            $this->debug($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->toString(), "CONNECT FAILED",5);
            return $this->raiseError(
                    "Connect failed, turn on debugging to 5 see why",
                        $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->code, PEAR_ERROR_DIE
            );

        }
         
        if (empty($this->_database)) {
            $hasGetDatabase = method_exists($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5], 'getDatabase');
            
            $this->_database = ($db_driver != 'DB' && $hasGetDatabase)  
                    ? $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->getDatabase() 
                    : $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['database'];


            if (($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->dsn['phptype'] == 'sqlite') 
                && is_file($this->_database)) 
            {
                $this->_database = basename($this->_database);
            }
        }
        
        // Oracle need to optimize for portibility - not sure exactly what this does though :)
        $c = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
         
        return true;
    }

    /**
     * sends query to database - this is the private one that must work 
     *   - internal functions use this rather than $this->query()
     *
     * @param  string  $string
     * @access private
     * @return mixed none or PEAR_Error
     */
    function _query($string)
    {
        global $_DB_DATAOBJECT;
        $this->_connect();
        

        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];

        $options = &$_DB_DATAOBJECT['CONFIG'];
        
        $_DB_driver = empty($_DB_DATAOBJECT['CONFIG']['db_driver']) ? 
                    'DB':  $_DB_DATAOBJECT['CONFIG']['db_driver'];
        
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug($string,$log="QUERY");
            
        }
        
        if (strtoupper($string) == 'BEGIN') {
            if ($_DB_driver == 'DB') {
                $DB->autoCommit(false);
            } else {
                $DB->beginTransaction();
            }
            // db backend adds begin anyway from now on..
            return true;
        }
        if (strtoupper($string) == 'COMMIT') {
            $res = $DB->commit();
            if ($_DB_driver == 'DB') {
                $DB->autoCommit(true);
            }
            return $res;
        }
        
        if (strtoupper($string) == 'ROLLBACK') {
            $DB->rollback();
            if ($_DB_driver == 'DB') {
                $DB->autoCommit(true);
            }
            return true;
        }
        

        if (!empty($options['debug_ignore_updates']) &&
            (strtolower(substr(trim($string), 0, 6)) != 'select') &&
            (strtolower(substr(trim($string), 0, 4)) != 'show') &&
            (strtolower(substr(trim($string), 0, 8)) != 'describe')) {

            $this->debug('Disabling Update as you are in debug mode');
            return $this->raiseError("Disabling Update as you are in debug mode", null) ;

        }
        //if (@$_DB_DATAOBJECT['CONFIG']['debug'] > 1) {
            // this will only work when PEAR:DB supports it.
            //$this->debug($DB->getAll('explain ' .$string,DB_DATAOBJECT_FETCHMODE_ASSOC), $log="sql",2);
        //}
        
        // some sim
        $t= explode(' ',microtime());
        $_DB_DATAOBJECT['QUERYENDTIME'] = $time = $t[0]+$t[1];
         
        
        for ($tries = 0;$tries < 3;$tries++) {
            
            if ($_DB_driver == 'DB') {
                
                $result = $DB->query($string);
            } else {
                switch (strtolower(substr(trim($string),0,6))) {
                
                    case 'insert':
                    case 'update':
                    case 'delete':
                        $result = $DB->exec($string);
                        break;
                        
                    default:
                        $result = $DB->query($string);
                        break;
                }
            }
            
            // see if we got a failure.. - try again a few times..
            if (!is_a($result,'PEAR_Error')) {
                break;
            }
            if ($result->getCode() != -14) {  // *DB_ERROR_NODBSELECTED
                break; // not a connection error..
            }
            sleep(1); // wait before retyring..
            $DB->connect($DB->dsn);
        }
       

        if (is_a($result,'PEAR_Error')) {
            if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) { 
                $this->debug($result->toString(), "Query Error",1 );
            }
            return $this->raiseError($result);
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $t= explode(' ',microtime());
            $_DB_DATAOBJECT['QUERYENDTIME'] = $t[0]+$t[1];
            $this->debug('QUERY DONE IN  '.($t[0]+$t[1]-$time)." seconds", 'query',1);
        }
        switch (strtolower(substr(trim($string),0,6))) {
            case 'insert':
            case 'update':
            case 'delete':
                if ($_DB_driver == 'DB') {
                    // pear DB specific
                    return $DB->affectedRows(); 
                }
                return $result;
        }
        if (is_object($result)) {
            // lets hope that copying the result object is OK!
            
            $_DB_resultid  = $GLOBALS['_DB_DATAOBJECT']['RESULTSEQ']++;
            $_DB_DATAOBJECT['RESULTS'][$_DB_resultid] = $result; 
            $this->_DB_resultid = $_DB_resultid;
        }
        $this->N = 0;
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            $this->debug(serialize($result), 'RESULT',5);
        }
        if (method_exists($result, 'numrows')) {
            if ($_DB_driver == 'DB') {
                $DB->expectError(DB_ERROR_UNSUPPORTED);
            } else {
                $DB->expectError(MDB2_ERROR_UNSUPPORTED);
            }
            $this->N = $result->numrows();
            if (is_a($this->N,'PEAR_Error')) {
                $this->N = true;
            }
            $DB->popExpect();
        }
    }

    /**
     * Builds the WHERE based on the values of of this object
     *
     * @param   mixed   $keys
     * @param   array   $filter (used by update to only uses keys in this filter list).
     * @param   array   $negative_filter (used by delete to prevent deleting using the keys mentioned..)
     * @access  private
     * @return  string
     */
    function _build_condition($keys, $filter = array(),$negative_filter=array())
    {
        global $_DB_DATAOBJECT;
        $this->_connect();
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
       
        $quoteIdentifiers  = !empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers']);
        $options = $_DB_DATAOBJECT['CONFIG'];
        
        // if we dont have query vars.. - reset them.
        if ($this->_query === false) {
            $x = new DB_DataObject;
            $this->_query= $x->_query;
        }

        foreach($keys as $k => $v) {
            // index keys is an indexed array
            /* these filter checks are a bit suspicious..
                - need to check that update really wants to work this way */

            if ($filter) {
                if (!in_array($k, $filter)) {
                    continue;
                }
            }
            if ($negative_filter) {
                if (in_array($k, $negative_filter)) {
                    continue;
                }
            }
            if (!isset($this->$k)) {
                continue;
            }
            
            $kSql = $quoteIdentifiers 
                ? ( $DB->quoteIdentifier($this->__table) . '.' . $DB->quoteIdentifier($k) )  
                : "{$this->__table}.{$k}";
             
             
            
            if (is_a($this->$k,'DB_DataObject_Cast')) {
                $dbtype = $DB->dsn["phptype"];
                $value = $this->$k->toString($v,$DB);
                if (PEAR::isError($value)) {
                    $this->raiseError($value->getMessage() ,DB_DATAOBJECT_ERROR_INVALIDARG);
                    return false;
                }
                if ((strtolower($value) === 'null') && !($v & DB_DATAOBJECT_NOTNULL)) {
                    $this->whereAdd(" $kSql IS NULL");
                    continue;
                }
                $this->whereAdd(" $kSql = $value");
                continue;
            }
            
            if (!isset($options['disable_null_strings']) &&  (strtolower($this->$k) === 'null') && !($v & DB_DATAOBJECT_NOTNULL)) {
                $this->whereAdd(" $kSql  IS NULL");
                continue;
            }
            

            if ($v & DB_DATAOBJECT_STR) {
                $this->whereAdd(" $kSql  = " . $this->_quote((string) (
                        ($v & DB_DATAOBJECT_BOOL) ? 
                            // this is thanks to the braindead idea of postgres to 
                            // use t/f for boolean.
                            (($this->$k === 'f') ? 0 : (int)(bool) $this->$k) :  
                            $this->$k
                    )) );
                continue;
            }
            if (is_numeric($this->$k)) {
                $this->whereAdd(" $kSql = {$this->$k}");
                continue;
            }
            /* this is probably an error condition! */
            $this->whereAdd(" $kSql = ".intval($this->$k));
        }
    }

    /**
     * autoload Class relating to a table
     * (depreciated - use ::factory)
     *
     * @param  string  $table  table
     * @access private
     * @return string classname on Success
     */
    function staticAutoloadTable($table)
    {
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        $p = isset($_DB_DATAOBJECT['CONFIG']['class_prefix']) ?
            $_DB_DATAOBJECT['CONFIG']['class_prefix'] : '';
        $class = $p . preg_replace('/[^A-Z0-9]/i','_',ucfirst($table));
        
        $ce = substr(phpversion(),0,1) > 4 ? class_exists($class,false) : class_exists($class);
        $class = $ce ? $class  : DB_DataObject::_autoloadClass($class);
        return $class;
    }
    
    
     /**
     * classic factory method for loading a table class
     * usage: $do = DB_DataObject::factory('person')
     * WARNING - this may emit a include error if the file does not exist..
     * use @ to silence it (if you are sure it is acceptable)
     * eg. $do = @DB_DataObject::factory('person')
     *
     * table name can bedatabasename/table
     * - and allow modular dataobjects to be written..
     * (this also helps proxy creation)
     *
     * Experimental Support for Multi-Database factory eg. mydatabase.mytable
     * 
     * 
     * @param  string  $table  tablename (use blank to create a new instance of the same class.)
     * @access private
     * @return DataObject|PEAR_Error 
     */
    
    

    function factory($table = '') {
        global $_DB_DATAOBJECT;
        
        
        // multi-database support.. - experimental.
        $database = '';
       
        if (strpos( $table,'/') !== false ) {
            list($database,$table) = explode('.',$table, 2);
          
        }
         
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        // no configuration available for database
        if (!empty($database) && empty($_DB_DATAOBJECT['CONFIG']['database_'.$database])) {
                return DB_DataObject::raiseError(
                    "unable to find database_{$database} in Configuration, It is required for factory with database"
                    , 0, PEAR_ERROR_DIE );   
       }
        
       
        
        if ($table === '') {
            if (is_a($this,'DB_DataObject') && strlen($this->__table)) {
                $table = $this->__table;
            } else {
                return DB_DataObject::raiseError(
                    "factory did not recieve a table name",
                    DB_DATAOBJECT_ERROR_INVALIDARGS);
            }
        }
        
        // does this need multi db support??
        $p = isset($_DB_DATAOBJECT['CONFIG']['class_prefix']) ?
            $_DB_DATAOBJECT['CONFIG']['class_prefix'] : '';
        $class = $p . preg_replace('/[^A-Z0-9]/i','_',ucfirst($table));
        $ce = substr(phpversion(),0,1) > 4 ? class_exists($class,false) : class_exists($class);
        
        $class = $ce ? $class  : DB_DataObject::_autoloadClass($class);
        
        // proxy = full|light
        if (!$class && isset($_DB_DATAOBJECT['CONFIG']['proxy'])) { 
        
            DB_DataObject::debug("FAILED TO Autoload  $database.$table - using proxy.","FACTORY",1);
        
        
            $proxyMethod = 'getProxy'.$_DB_DATAOBJECT['CONFIG']['proxy'];
            // if you have loaded (some other way) - dont try and load it again..
            class_exists('DB_DataObject_Generator') ? '' : 
                    require_once 'DB/DataObject/Generator.php';
            
            $d = new DB_DataObject;
           
            $d->__table = $table;
            if (is_a($ret = $d->_connect(), 'PEAR_Error')) {
                return $ret;
            }
            
            $x = new DB_DataObject_Generator;
            return $x->$proxyMethod( $d->_database, $table);
        }
        
        if (!$class) {
            return DB_DataObject::raiseError(
                "factory could not find class $class from $table",
                DB_DATAOBJECT_ERROR_INVALIDCONFIG);
        }
        $ret = new $class;
        if (!empty($database)) {
            DB_DataObject::debug("Setting database to $database","FACTORY",1);
            $ret->database($database);
        }
        return $ret;
    }
    /**
     * autoload Class
     *
     * @param  string  $class  Class
     * @access private
     * @return string classname on Success
     */
    function _autoloadClass($class)
    {
        global $_DB_DATAOBJECT;
        
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        $class_prefix = empty($_DB_DATAOBJECT['CONFIG']['class_prefix']) ? 
                '' : $_DB_DATAOBJECT['CONFIG']['class_prefix'];
                
        $table   = substr($class,strlen($class_prefix));

        // only include the file if it exists - and barf badly if it has parse errors :)
        if (!empty($_DB_DATAOBJECT['CONFIG']['proxy']) || empty($_DB_DATAOBJECT['CONFIG']['class_location'])) {
            return false;
        }
        
        
        if (strpos($_DB_DATAOBJECT['CONFIG']['class_location'],'%s') !== false) {
            $file = sprintf($_DB_DATAOBJECT['CONFIG']['class_location'], preg_replace('/[^A-Z0-9]/i','_',ucfirst($table)));
        } else {
            $file = $_DB_DATAOBJECT['CONFIG']['class_location'].'/'.preg_replace('/[^A-Z0-9]/i','_',ucfirst($table)).".php";
        }
        
        if (!file_exists($file)) {
            $found = false;
            foreach(explode(PATH_SEPARATOR, ini_get('include_path')) as $p) {
                if (file_exists("$p/$file")) {
                    $file = "$p/$file";
                    $found = true;
                    break;
                }
            }
            if (!$found) {
                DB_DataObject::raiseError(
                    "autoload:Could not find class {$class} using class_location value", 
                    DB_DATAOBJECT_ERROR_INVALIDCONFIG);
                return false;
            }
        }
        
        include_once $file;
        
        
        $ce = substr(phpversion(),0,1) > 4 ? class_exists($class,false) : class_exists($class);
        
        if (!$ce) {
            DB_DataObject::raiseError(
                "autoload:Could not autoload {$class}", 
                DB_DATAOBJECT_ERROR_INVALIDCONFIG);
            return false;
        }
        return $class;
    }
    
    
    
    /**
     * Have the links been loaded?
     * if they have it contains a array of those variables.
     *
     * @access  private
     * @var     boolean | array
     */
    var $_link_loaded = false;
    
    /**
    * Get the links associate array  as defined by the links.ini file.
    * 
    *
    * Experimental... - 
    * Should look a bit like
    *       [local_col_name] => "related_tablename:related_col_name"
    * 
    * 
    * @return   array|null    
    *           array       = if there are links defined for this table.
    *           empty array - if there is a links.ini file, but no links on this table
    *           null        - if no links.ini exists for this database (hence try auto_links).
    * @access   public
    * @see      DB_DataObject::getLinks(), DB_DataObject::getLink()
    */
    
    function links()
    {
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            $this->_loadConfig();
        }
        // have to connect.. -> otherwise things break later.
        $this->_connect();
        
        if (isset($_DB_DATAOBJECT['LINKS'][$this->_database][$this->__table])) {
            return $_DB_DATAOBJECT['LINKS'][$this->_database][$this->__table];
        }
        
        
        
        
        
        // attempt to load links file here..
        
        if (!isset($_DB_DATAOBJECT['LINKS'][$this->_database])) {
            $schemas = isset($_DB_DATAOBJECT['CONFIG']['schema_location']) ?
                array("{$_DB_DATAOBJECT['CONFIG']['schema_location']}/{$this->_database}.ini") :
                array() ;
                     
            if (isset($_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"])) {
                $schemas = is_array($_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"]) ?
                    $_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"] :
                    explode(PATH_SEPARATOR,$_DB_DATAOBJECT['CONFIG']["ini_{$this->_database}"]);
            }
                        
             
            
            foreach ($schemas as $ini) {
                
                $links =
                    isset($_DB_DATAOBJECT['CONFIG']["links_{$this->_database}"]) ?
                        $_DB_DATAOBJECT['CONFIG']["links_{$this->_database}"] :
                        str_replace('.ini','.links.ini',$ini);
        
                if (empty($_DB_DATAOBJECT['LINKS'][$this->_database]) && file_exists($links) && is_file($links)) {
                    /* not sure why $links = ... here  - TODO check if that works */
                    $_DB_DATAOBJECT['LINKS'][$this->_database] = parse_ini_file($links, true);
                    if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                        $this->debug("Loaded links.ini file: $links","links",1);
                    }
                } else {
                    if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
                        $this->debug("Missing links.ini file: $links","links",1);
                    }
                }
            }
        }
        
        
        // if there is no link data at all on the file!
        // we return null.
        if (!isset($_DB_DATAOBJECT['LINKS'][$this->_database])) {
            return null;
        }
        
        if (isset($_DB_DATAOBJECT['LINKS'][$this->_database][$this->__table])) {
            return $_DB_DATAOBJECT['LINKS'][$this->_database][$this->__table];
        }
        
        return array();
    }
    /**
     * load related objects
     *
     * There are two ways to use this, one is to set up a <dbname>.links.ini file
     * into a static property named <dbname>.links and specifies the table joins,
     * the other highly dependent on naming columns 'correctly' :)
     * using colname = xxxxx_yyyyyy
     * xxxxxx = related table; (yyyyy = user defined..)
     * looks up table xxxxx, for value id=$this->xxxxx
     * stores it in $this->_xxxxx_yyyyy
     * you can change what object vars the links are stored in by 
     * changeing the format parameter
     *
     *
     * @param  string format (default _%s) where %s is the table name.
     * @author Tim White <tim@cyface.com>
     * @access public
     * @return boolean , true on success
     */
    function getLinks($format = '_%s')
    {
         
        // get table will load the options.
        if ($this->_link_loaded) {
            return true;
        }
        $this->_link_loaded = false;
        $cols  = $this->table();
        $links = $this->links();
         
        $loaded = array();
        
        if ($links) {   
            foreach($links as $key => $match) {
                list($table,$link) = explode(':', $match);
                $k = sprintf($format, str_replace('.', '_', $key));
                // makes sure that '.' is the end of the key;
                if ($p = strpos($key,'.')) {
                      $key = substr($key, 0, $p);
                }
                
                $this->$k = $this->getLink($key, $table, $link);
                
                if (is_object($this->$k)) {
                    $loaded[] = $k; 
                }
            }
            $this->_link_loaded = $loaded;
            return true;
        }
        // this is the autonaming stuff..
        // it sends the column name down to getLink and lets that sort it out..
        // if there is a links file then it is not used!
        // IT IS DEPRECIATED!!!! - USE 
        if (!is_null($links)) {    
            return false;
        }
        
        
        foreach (array_keys($cols) as $key) {
            if (!($p = strpos($key, '_'))) {
                continue;
            }
            // does the table exist.
            $k =sprintf($format, $key);
            $this->$k = $this->getLink($key);
            if (is_object($this->$k)) {
                $loaded[] = $k; 
            }
        }
        $this->_link_loaded = $loaded;
        return true;
    }

    /**
     * return name from related object
     *
     * There are two ways to use this, one is to set up a <dbname>.links.ini file
     * into a static property named <dbname>.links and specifies the table joins,
     * the other is highly dependant on naming columns 'correctly' :)
     *
     * NOTE: the naming convention is depreciated!!! - use links.ini
     *
     * using colname = xxxxx_yyyyyy
     * xxxxxx = related table; (yyyyy = user defined..)
     * looks up table xxxxx, for value id=$this->xxxxx
     * stores it in $this->_xxxxx_yyyyy
     *
     * you can also use $this->getLink('thisColumnName','otherTable','otherTableColumnName')
     *
     *
     * @param string $row    either row or row.xxxxx
     * @param string $table  name of table to look up value in
     * @param string $link   name of column in other table to match
     * @author Tim White <tim@cyface.com>
     * @access public
     * @return mixed object on success
     */
    function getLink($row, $table = null, $link = false)
    {
        
        
        // GUESS THE LINKED TABLE.. (if found - recursevly call self)
        
        if ($table === null) {
            $links = $this->links();
            
            if (is_array($links)) {
            
                if ($links[$row]) {
                    list($table,$link) = explode(':', $links[$row]);
                    if ($p = strpos($row,".")) {
                        $row = substr($row,0,$p);
                    }
                    return $this->getLink($row,$table,$link);
                    
                } 
                
                $this->raiseError(
                    "getLink: $row is not defined as a link (normally this is ok)", 
                    DB_DATAOBJECT_ERROR_NODATA);
                    
                $r = false;
                return $r;// technically a possible error condition?

            }  
            // use the old _ method - this shouldnt happen if called via getLinks()
            if (!($p = strpos($row, '_'))) {
                $r = null;
                return $r; 
            }
            $table = substr($row, 0, $p);
            return $this->getLink($row, $table);
            

        }
        
        
        
        if (!isset($this->$row)) {
            $this->raiseError("getLink: row not set $row", DB_DATAOBJECT_ERROR_NODATA);
            return false;
        }
        
        // check to see if we know anything about this table..
        
        $obj = $this->factory($table);
        
        if (!is_a($obj,'DB_DataObject')) {
            $this->raiseError(
                "getLink:Could not find class for row $row, table $table", 
                DB_DATAOBJECT_ERROR_INVALIDCONFIG);
            return false;
        }
        if ($link) {
            if ($obj->get($link, $this->$row)) {
                $obj->free();
                return $obj;
            } 
            return  false;
        }
        
        if ($obj->get($this->$row)) {
            $obj->free();
            return $obj;
        }
        return false;
        
    }

    /**
     * IS THIS SUPPORTED/USED ANYMORE???? 
     *return a list of options for a linked table
     *
     * This is highly dependant on naming columns 'correctly' :)
     * using colname = xxxxx_yyyyyy
     * xxxxxx = related table; (yyyyy = user defined..)
     * looks up table xxxxx, for value id=$this->xxxxx
     * stores it in $this->_xxxxx_yyyyy
     *
     * @access public
     * @return array of results (empty array on failure)
     */
    function &getLinkArray($row, $table = null)
    {
        
        $ret = array();
        if (!$table) {
            $links = $this->links();
            
            if (is_array($links)) {
                if (!isset($links[$row])) {
                    // failed..
                    return $ret;
                }
                list($table,$link) = explode(':',$links[$row]);
            } else {
                if (!($p = strpos($row,'_'))) {
                    return $ret;
                }
                $table = substr($row,0,$p);
            }
        }
        
        $c  = $this->factory($table);
        
        if (!is_a($c,'DB_DataObject')) {
            $this->raiseError(
                "getLinkArray:Could not find class for row $row, table $table", 
                DB_DATAOBJECT_ERROR_INVALIDCONFIG
            );
            return $ret;
        }

        // if the user defined method list exists - use it...
        if (method_exists($c, 'listFind')) {
            $c->listFind($this->id);
        } else {
            $c->find();
        }
        while ($c->fetch()) {
            $ret[] = $c;
        }
        return $ret;
    }

    /**
     * The JOIN condition
     *
     * @access  private
     * @var     string
     */
    var $_join = '';

    /**
     * joinAdd - adds another dataobject to this, building a joined query.
     *
     * example (requires links.ini to be set up correctly)
     * // get all the images for product 24
     * $i = new DataObject_Image();
     * $pi = new DataObjects_Product_image();
     * $pi->product_id = 24; // set the product id to 24
     * $i->joinAdd($pi); // add the product_image connectoin
     * $i->find();
     * while ($i->fetch()) {
     *     // do stuff
     * }
     * // an example with 2 joins
     * // get all the images linked with products or productgroups
     * $i = new DataObject_Image();
     * $pi = new DataObject_Product_image();
     * $pgi = new DataObject_Productgroup_image();
     * $i->joinAdd($pi);
     * $i->joinAdd($pgi);
     * $i->find();
     * while ($i->fetch()) {
     *     // do stuff
     * }
     *
     *
     * @param    optional $obj       object |array    the joining object (no value resets the join)
     *                                          If you use an array here it should be in the format:
     *                                          array('local_column','remotetable:remote_column');
     *                                          if remotetable does not have a definition, you should
     *                                          use @ to hide the include error message..
     *                                      
     *
     * @param    optional $joinType  string | array
     *                                          'LEFT'|'INNER'|'RIGHT'|'' Inner is default, '' indicates 
     *                                          just select ... from a,b,c with no join and 
     *                                          links are added as where items.
     *                                          
     *                                          If second Argument is array, it is assumed to be an associative
     *                                          array with arguments matching below = eg.
     *                                          'joinType' => 'INNER',
     *                                          'joinAs' => '...'
     *                                          'joinCol' => ....
     *                                          'useWhereAsOn' => false,
     *
     * @param    optional $joinAs    string     if you want to select the table as anther name
     *                                          useful when you want to select multiple columsn
     *                                          from a secondary table.
     
     * @param    optional $joinCol   string     The column on This objects table to match (needed
     *                                          if this table links to the child object in 
     *                                          multiple places eg.
     *                                          user->friend (is a link to another user)
     *                                          user->mother (is a link to another user..)
     *
     *           optional 'useWhereAsOn' bool   default false;
     *                                          convert the where argments from the object being added
     *                                          into ON arguments.
     * 
     * 
     * @return   none
     * @access   public
     * @author   Stijn de Reede      <sjr@gmx.co.uk>
     */
    function joinAdd($obj = false, $joinType='INNER', $joinAs=false, $joinCol=false)
    {
        global $_DB_DATAOBJECT;
        if ($obj === false) {
            $this->_join = '';
            return;
        }
         
        //echo '<PRE>'; print_r(func_get_args());
        $useWhereAsOn = false;
        // support for 2nd argument as an array of options
        if (is_array($joinType)) {
            // new options can now go in here... (dont forget to document them)
            $useWhereAsOn = !empty($joinType['useWhereAsOn']);
            $joinCol      = isset($joinType['joinCol'])  ? $joinType['joinCol']  : $joinCol;
            $joinAs       = isset($joinType['joinAs'])   ? $joinType['joinAs']   : $joinAs;
            $joinType     = isset($joinType['joinType']) ? $joinType['joinType'] : 'INNER';
        }
        // support for array as first argument 
        // this assumes that you dont have a links.ini for the specified table.
        // and it doesnt exist as am extended dataobject!! - experimental.
        
        $ofield = false; // object field
        $tfield = false; // this field
        $toTable = false;
        if (is_array($obj)) {
            $tfield = $obj[0];
            list($toTable,$ofield) = explode(':',$obj[1]);
            $obj = DB_DataObject::factory($toTable);
            
            if (!$obj || is_a($obj,'PEAR_Error')) {
                $obj = new DB_DataObject;
                $obj->__table = $toTable;
            }
            $obj->_connect();
            // set the table items to nothing.. - eg. do not try and match
            // things in the child table...???
            $items = array();
        }
        
        if (!is_object($obj) || !is_a($obj,'DB_DataObject')) {
            return $this->raiseError("joinAdd: called without an object", DB_DATAOBJECT_ERROR_NODATA,PEAR_ERROR_DIE);
        }
        /*  make sure $this->_database is set.  */
        $this->_connect();
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
       

        /// CHANGED 26 JUN 2009 - we prefer links from our local table over the remote one.
        
        /* otherwise see if there are any links from this table to the obj. */
        //print_r($this->links());
        if (($ofield === false) && ($links = $this->links())) {
            foreach ($links as $k => $v) {
                /* link contains {this column} = {linked table}:{linked column} */
                $ar = explode(':', $v);
                // Feature Request #4266 - Allow joins with multiple keys
                if (strpos($k, ',') !== false) {
                    $k = explode(',', $k);
                }
                if (strpos($ar[1], ',') !== false) {
                    $ar[1] = explode(',', $ar[1]);
                }

                if ($ar[0] == $obj->__table) {
                    if ($joinCol !== false) {
                        if ($k == $joinCol) {
                            $tfield = $k;
                            $ofield = $ar[1];
                            break;
                        } else {
                            continue;
                        }
                    } else {
                        $tfield = $k;
                        $ofield = $ar[1];
                        break;
                    }
                }
            }
        }
         /* look up the links for obj table */
        //print_r($obj->links());
        if (!$ofield && ($olinks = $obj->links())) {
            
            foreach ($olinks as $k => $v) {
                /* link contains {this column} = {linked table}:{linked column} */
                $ar = explode(':', $v);
                
                // Feature Request #4266 - Allow joins with multiple keys
                
                $links_key_array = strpos($k,',');
                if ($links_key_array !== false) {
                    $k = explode(',', $k);
                }
                
                $ar_array = strpos($ar[1],',');
                if ($ar_array !== false) {
                    $ar[1] = explode(',', $ar[1]);
                }
             
                if ($ar[0] == $this->__table) {
                    
                    // you have explictly specified the column
                    // and the col is listed here..
                    // not sure if 1:1 table could cause probs here..
                    
                    if ($joinCol !== false) {
                        $this->raiseError( 
                            "joinAdd: You cannot target a join column in the " .
                            "'link from' table ({$obj->__table}). " . 
                            "Either remove the fourth argument to joinAdd() ".
                            "({$joinCol}), or alter your links.ini file.",
                            DB_DATAOBJECT_ERROR_NODATA);
                        return false;
                    }
                
                    $ofield = $k;
                    $tfield = $ar[1];
                    break;
                }
            }
        }

        // finally if these two table have column names that match do a join by default on them

        if (($ofield === false) && $joinCol) {
            $ofield = $joinCol;
            $tfield = $joinCol;

        }
        /* did I find a conneciton between them? */

        if ($ofield === false) {
            $this->raiseError(
                "joinAdd: {$obj->__table} has no link with {$this->__table}",
                DB_DATAOBJECT_ERROR_NODATA);
            return false;
        }
        $joinType = strtoupper($joinType);
        
        // we default to joining as the same name (this is remvoed later..)
        
        if ($joinAs === false) {
            $joinAs = $obj->__table;
        }
        
        $quoteIdentifiers = !empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers']);
        $options = $_DB_DATAOBJECT['CONFIG'];
        
        // not sure  how portable adding database prefixes is..
        $objTable = $quoteIdentifiers ? 
                $DB->quoteIdentifier($obj->__table) : 
                 $obj->__table ;
                
        $dbPrefix  = '';
        if (strlen($obj->_database) && in_array($DB->dsn['phptype'],array('mysql','mysqli'))) {
            $dbPrefix = ($quoteIdentifiers
                         ? $DB->quoteIdentifier($obj->_database)
                         : $obj->_database) . '.';    
        }
        
        // if they are the same, then dont add a prefix...                
        if ($obj->_database == $this->_database) {
           $dbPrefix = '';
        }
        // as far as we know only mysql supports database prefixes..
        // prefixing the database name is now the default behaviour,
        // as it enables joining mutiple columns from multiple databases...
         
            // prefix database (quoted if neccessary..)
        $objTable = $dbPrefix . $objTable;
       
        $cond = '';

        // if obj only a dataobject - eg. no extended class has been defined..
        // it obvioulsy cant work out what child elements might exist...
        // until we get on the fly querying of tables..
        // note: we have already checked that it is_a(db_dataobject earlier)
        if ( strtolower(get_class($obj)) != 'db_dataobject') {
                 
            // now add where conditions for anything that is set in the object 
        
        
        
            $items = $obj->table();
            // will return an array if no items..
            
            // only fail if we where expecting it to work (eg. not joined on a array)
             
            if (!$items) {
                $this->raiseError(
                    "joinAdd: No table definition for {$obj->__table}", 
                    DB_DATAOBJECT_ERROR_INVALIDCONFIG);
                return false;
            }

            foreach($items as $k => $v) {
                if (!isset($obj->$k)) {
                    continue;
                }
                
                $kSql = ($quoteIdentifiers ? $DB->quoteIdentifier($k) : $k);
                
                
                if ($v & DB_DATAOBJECT_STR) {
                    $obj->whereAdd("{$joinAs}.{$kSql} = " . $this->_quote((string) (
                            ($v & DB_DATAOBJECT_BOOL) ? 
                                // this is thanks to the braindead idea of postgres to 
                                // use t/f for boolean.
                                (($obj->$k === 'f') ? 0 : (int)(bool) $obj->$k) :  
                                $obj->$k
                        )));
                    continue;
                }
                if (is_numeric($obj->$k)) {
                    $obj->whereAdd("{$joinAs}.{$kSql} = {$obj->$k}");
                    continue;
                }
                            
                if (is_a($obj->$k,'DB_DataObject_Cast')) {
                    $value = $obj->$k->toString($v,$DB);
                    if (PEAR::isError($value)) {
                        $this->raiseError($value->getMessage() ,DB_DATAOBJECT_ERROR_INVALIDARG);
                        return false;
                    }
                    if (!isset($options['disable_null_strings']) && strtolower($value) === 'null') {
                        $obj->whereAdd("{$joinAs}.{$kSql} IS NULL");
                        continue;
                    } else {
                        $obj->whereAdd("{$joinAs}.{$kSql} = $value");
                        continue;
                    }
                }
                
                
                /* this is probably an error condition! */
                $obj->whereAdd("{$joinAs}.{$kSql} = 0");
            }
            if ($this->_query === false) {
                $this->raiseError(
                    "joinAdd can not be run from a object that has had a query run on it,
                    clone the object or create a new one and use setFrom()", 
                    DB_DATAOBJECT_ERROR_INVALIDARGS);
                return false;
            }
        }

        // and finally merge the whereAdd from the child..
        if ($obj->_query['condition']) {
            $cond = preg_replace('/^\sWHERE/i','',$obj->_query['condition']);

            if (!$useWhereAsOn) {
                $this->whereAdd($cond);
            }
        }
    
        
        
        
        // nested (join of joined objects..)
        $appendJoin = '';
        if ($obj->_join) {
            // postgres allows nested queries, with ()'s
            // not sure what the results are with other databases..
            // may be unpredictable..
            if (in_array($DB->dsn["phptype"],array('pgsql'))) {
                $objTable = "($objTable {$obj->_join})";
            } else {
                $appendJoin = $obj->_join;
            }
        }
        
  
        // fix for #2216
        // add the joinee object's conditions to the ON clause instead of the WHERE clause
        if ($useWhereAsOn && strlen($cond)) {
            $appendJoin = ' AND ' . $cond . ' ' . $appendJoin;
        }
               
        
        
        $table = $this->__table;
        
        if ($quoteIdentifiers) {
            $joinAs   = $DB->quoteIdentifier($joinAs);
            $table    = $DB->quoteIdentifier($table);     
            $ofield   = (is_array($ofield)) ? array_map(array($DB, 'quoteIdentifier'), $ofield) : $DB->quoteIdentifier($ofield);
            $tfield   = (is_array($tfield)) ? array_map(array($DB, 'quoteIdentifier'), $tfield) : $DB->quoteIdentifier($tfield); 
        }
        // add database prefix if they are different databases
       
        
        $fullJoinAs = '';
        $addJoinAs  = ($quoteIdentifiers ? $DB->quoteIdentifier($obj->__table) : $obj->__table) != $joinAs;
        if ($addJoinAs) {
            // join table a AS b - is only supported by a few databases and is probably not needed
            // , however since it makes the whole Statement alot clearer we are leaving it in
            // for those databases.
            $fullJoinAs = in_array($DB->dsn["phptype"],array('mysql','mysqli','pgsql')) ? "AS {$joinAs}" :  $joinAs;
        } else {
            // if 
            $joinAs = $dbPrefix . $joinAs;
        }
        
        
        switch ($joinType) {
            case 'INNER':
            case 'LEFT': 
            case 'RIGHT': // others??? .. cross, left outer, right outer, natural..?
                
                // Feature Request #4266 - Allow joins with multiple keys
                $jadd = "\n {$joinType} JOIN {$objTable} {$fullJoinAs}";
                //$this->_join .= "\n {$joinType} JOIN {$objTable} {$fullJoinAs}";
                if (is_array($ofield)) {
                	$key_count = count($ofield);
                    for($i = 0; $i < $key_count; $i++) {
                    	if ($i == 0) {
                    		$jadd .= " ON ({$joinAs}.{$ofield[$i]}={$table}.{$tfield[$i]}) ";
                    	}
                    	else {
                    		$jadd .= " AND {$joinAs}.{$ofield[$i]}={$table}.{$tfield[$i]} ";
                    	}
                    }
                    $jadd .= ' ' . $appendJoin . ' ';
                } else {
	                $jadd .= " ON ({$joinAs}.{$ofield}={$table}.{$tfield}) {$appendJoin} ";
                }
                // jadd avaliable for debugging join build.
                //echo $jadd ."\n";
                $this->_join .= $jadd;
                break;
                
            case '': // this is just a standard multitable select..
                $this->_join .= "\n , {$objTable} {$fullJoinAs} {$appendJoin}";
                $this->whereAdd("{$joinAs}.{$ofield}={$table}.{$tfield}");
        }
         
         
        return true;

    }

    /**
     * Copies items that are in the table definitions from an
     * array or object into the current object
     * will not override key values.
     *
     *
     * @param    array | object  $from
     * @param    string  $format eg. map xxxx_name to $object->name using 'xxxx_%s' (defaults to %s - eg. name -> $object->name
     * @param    boolean  $skipEmpty (dont assign empty values if a column is empty (eg. '' / 0 etc...)
     * @access   public
     * @return   true on success or array of key=>setValue error message
     */
    function setFrom($from, $format = '%s', $skipEmpty=false)
    {
        global $_DB_DATAOBJECT;
        $keys  = $this->keys();
        $items = $this->table();
        if (!$items) {
            $this->raiseError(
                "setFrom:Could not find table definition for {$this->__table}", 
                DB_DATAOBJECT_ERROR_INVALIDCONFIG);
            return;
        }
        $overload_return = array();
        foreach (array_keys($items) as $k) {
            if (in_array($k,$keys)) {
                continue; // dont overwrite keys
            }
            if (!$k) {
                continue; // ignore empty keys!!! what
            }
            if (is_object($from) && isset($from->{sprintf($format,$k)})) {
                $kk = (strtolower($k) == 'from') ? '_from' : $k;
                if (method_exists($this,'set'.$kk)) {
                    $ret = $this->{'set'.$kk}($from->{sprintf($format,$k)});
                    if (is_string($ret)) {
                        $overload_return[$k] = $ret;
                    }
                    continue;
                }
                $this->$k = $from->{sprintf($format,$k)};
                continue;
            }
            
            if (is_object($from)) {
                continue;
            }
            
            if (empty($from[sprintf($format,$k)]) && $skipEmpty) {
                continue;
            }
            
            if (!isset($from[sprintf($format,$k)])) {
                continue;
            }
           
            $kk = (strtolower($k) == 'from') ? '_from' : $k;
            if (method_exists($this,'set'. $kk)) {
                $ret =  $this->{'set'.$kk}($from[sprintf($format,$k)]);
                if (is_string($ret)) {
                    $overload_return[$k] = $ret;
                }
                continue;
            }
            if (is_object($from[sprintf($format,$k)])) {
                continue;
            }
            if (is_array($from[sprintf($format,$k)])) {
                continue;
            }
            $ret = $this->fromValue($k,$from[sprintf($format,$k)]);
            if ($ret !== true)  {
                $overload_return[$k] = 'Not A Valid Value';
            }
            //$this->$k = $from[sprintf($format,$k)];
        }
        if ($overload_return) {
            return $overload_return;
        }
        return true;
    }

    /**
     * Returns an associative array from the current data
     * (kind of oblivates the idea behind DataObjects, but
     * is usefull if you use it with things like QuickForms.
     *
     * you can use the format to return things like user[key]
     * by sending it $object->toArray('user[%s]')
     *
     * will also return links converted to arrays.
     *
     * @param   string  sprintf format for array
     * @param   bool    empty only return elemnts that have a value set.
     *
     * @access   public
     * @return   array of key => value for row
     */

    function toArray($format = '%s', $hideEmpty = false) 
    {
        global $_DB_DATAOBJECT;
        $ret = array();
        $rf = ($this->_resultFields !== false) ? $this->_resultFields : 
                (isset($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid]) ? $_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid] : false);
        $ar = ($rf !== false) ?
            array_merge($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid],$this->table()) :
            $this->table();

        foreach($ar as $k=>$v) {
             
            if (!isset($this->$k)) {
                if (!$hideEmpty) {
                    $ret[sprintf($format,$k)] = '';
                }
                continue;
            }
            // call the overloaded getXXXX() method. - except getLink and getLinks
            if (method_exists($this,'get'.$k) && !in_array(strtolower($k),array('links','link'))) {
                $ret[sprintf($format,$k)] = $this->{'get'.$k}();
                continue;
            }
            // should this call toValue() ???
            $ret[sprintf($format,$k)] = $this->$k;
        }
        if (!$this->_link_loaded) {
            return $ret;
        }
        foreach($this->_link_loaded as $k) {
            $ret[sprintf($format,$k)] = $this->$k->toArray();
        
        }
        
        return $ret;
    }

    /**
     * validate the values of the object (usually prior to inserting/updating..)
     *
     * Note: This was always intended as a simple validation routine.
     * It lacks understanding of field length, whether you are inserting or updating (and hence null key values)
     *
     * This should be moved to another class: DB_DataObject_Validate 
     *      FEEL FREE TO SEND ME YOUR VERSION FOR CONSIDERATION!!!
     *
     * Usage:
     * if (is_array($ret = $obj->validate())) { ... there are problems with the data ... }
     *
     * Logic:
     *   - defaults to only testing strings/numbers if numbers or strings are the correct type and null values are correct
     *   - validate Column methods : "validate{ROWNAME}()"  are called if they are defined.
     *            These methods should return 
     *                  true = everything ok
     *                  false|object = something is wrong!
     * 
     *   - This method loads and uses the PEAR Validate Class.
     *
     *
     * @access  public
     * @return  array of validation results (where key=>value, value=false|object if it failed) or true (if they all succeeded)
     */
    function validate()
    {
        global $_DB_DATAOBJECT;
        require_once 'Validate.php';
        $table = $this->table();
        $ret   = array();
        $seq   = $this->sequenceKey();
        $options = $_DB_DATAOBJECT['CONFIG'];
        foreach($table as $key => $val) {
            
            
            // call user defined validation always...
            $method = "Validate" . ucfirst($key);
            if (method_exists($this, $method)) {
                $ret[$key] = $this->$method();
                continue;
            }
            
            // if not null - and it's not set.......
            
            if (!isset($this->$key) && ($val & DB_DATAOBJECT_NOTNULL)) {
                // dont check empty sequence key values..
                if (($key == $seq[0]) && ($seq[1] == true)) {
                    continue;
                }
                $ret[$key] = false;
                continue;
            }
            
            
            if (!isset($options['disable_null_strings']) && is_string($this->$key) && (strtolower($this->$key) == 'null')) {
                if ($val & DB_DATAOBJECT_NOTNULL) {
                    $this->debug("'null' field used for '$key', but it is defined as NOT NULL", 'VALIDATION', 4);
                    $ret[$key] = false;
                    continue;
                }
                continue;
            }

            // ignore things that are not set. ?
           
            if (!isset($this->$key)) {
                continue;
            }
            
            // if the string is empty.. assume it is ok..
            if (!is_object($this->$key) && !is_array($this->$key) && !strlen((string) $this->$key)) {
                continue;
            }
            
            // dont try and validate cast objects - assume they are problably ok..
            if (is_object($this->$key) && is_a($this->$key,'DB_DataObject_Cast')) {
                continue;
            }
            // at this point if you have set something to an object, and it's not expected
            // the Validate will probably break!!... - rightly so! (your design is broken, 
            // so issuing a runtime error like PEAR_Error is probably not appropriate..
            
            switch (true) {
                // todo: date time.....
                case  ($val & DB_DATAOBJECT_STR):
                    $ret[$key] = Validate::string($this->$key, VALIDATE_PUNCTUATION . VALIDATE_NAME);
                    continue;
                case  ($val & DB_DATAOBJECT_INT):
                    $ret[$key] = Validate::number($this->$key, array('decimal'=>'.'));
                    continue;
            }
        }
        // if any of the results are false or an object (eg. PEAR_Error).. then return the array..
        foreach ($ret as $key => $val) {
            if ($val !== true) {
                return $ret;
            }
        }
        return true; // everything is OK.
    }

    /**
     * Gets the DB object related to an object - so you can use funky peardb stuf with it :)
     *
     * @access public
     * @return object The DB connection
     */
    function &getDatabaseConnection()
    {
        global $_DB_DATAOBJECT;

        if (($e = $this->_connect()) !== true) {
            return $e;
        }
        if (!isset($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            $r = false;
            return $r;
        }
        return $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
    }
 
 
    /**
     * Gets the DB result object related to the objects active query
     *  - so you can use funky pear stuff with it - like pager for example.. :)
     *
     * @access public
     * @return object The DB result object
     */
     
    function &getDatabaseResult()
    {
        global $_DB_DATAOBJECT;
        $this->_connect();
        if (!isset($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid])) {
            $r = false;
            return $r;
        }
        return $_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid];
    }

    /**
     * Overload Extension support
     *  - enables setCOLNAME/getCOLNAME
     *  if you define a set/get method for the item it will be called.
     * otherwise it will just return/set the value.
     * NOTE this currently means that a few Names are NO-NO's 
     * eg. links,link,linksarray, from, Databaseconnection,databaseresult
     *
     * note 
     *  - set is automatically called by setFrom.
     *   - get is automatically called by toArray()
     *  
     * setters return true on success. = strings on failure
     * getters return the value!
     *
     * this fires off trigger_error - if any problems.. pear_error, 
     * has problems with 4.3.2RC2 here
     *
     * @access public
     * @return true?
     * @see overload
     */

    
    function _call($method,$params,&$return) {
        
        //$this->debug("ATTEMPTING OVERLOAD? $method");
        // ignore constructors : - mm
        if (strtolower($method) == strtolower(get_class($this))) {
            return true;
        }
        $type = strtolower(substr($method,0,3));
        $class = get_class($this);
        if (($type != 'set') && ($type != 'get')) {
            return false;
        }
         
        
        
        // deal with naming conflick of setFrom = this is messy ATM!
        
        if (strtolower($method) == 'set_from') {
            $return = $this->toValue('from',isset($params[0]) ? $params[0] : null);
            return  true;
        }
        
        $element = substr($method,3);
        
        // dont you just love php's case insensitivity!!!!
        
        $array =  array_keys(get_class_vars($class));
        /* php5 version which segfaults on 5.0.3 */
        if (class_exists('ReflectionClass')) {
            $reflection = new ReflectionClass($class);
            $array = array_keys($reflection->getdefaultProperties());
        }
        
        if (!in_array($element,$array)) {
            // munge case
            foreach($array as $k) {
                $case[strtolower($k)] = $k;
            }
            if ((substr(phpversion(),0,1) == 5) && isset($case[strtolower($element)])) {
                trigger_error("PHP5 set/get calls should match the case of the variable",E_USER_WARNING);
                $element = strtolower($element);
            }
            
            // does it really exist?
            if (!isset($case[$element])) {
                return false;            
            }
            // use the mundged case
            $element = $case[$element]; // real case !
        }
        
        
        if ($type == 'get') {
            $return = $this->toValue($element,isset($params[0]) ? $params[0] : null);
            return true;
        }
        
        
        $return = $this->fromValue($element, $params[0]);
         
        return true;
            
          
    }
        
    
    /**
    * standard set* implementation.
    *
    * takes data and uses it to set dates/strings etc.
    * normally called from __call..  
    *
    * Current supports
    *   date      = using (standard time format, or unixtimestamp).... so you could create a method :
    *               function setLastread($string) { $this->fromValue('lastread',strtotime($string)); }
    *
    *   time      = using strtotime 
    *   datetime  = using  same as date - accepts iso standard or unixtimestamp.
    *   string    = typecast only..
    * 
    * TODO: add formater:: eg. d/m/Y for date! ???
    *
    * @param   string       column of database
    * @param   mixed        value to assign
    *
    * @return   true| false     (False on error)
    * @access   public 
    * @see      DB_DataObject::_call
    */
  
    
    function fromValue($col,$value) 
    {
        global $_DB_DATAOBJECT;
        $options = $_DB_DATAOBJECT['CONFIG'];
        $cols = $this->table();
        // dont know anything about this col..
        if (!isset($cols[$col])) {
            $this->$col = $value;
            return true;
        }
        //echo "FROM VALUE $col, {$cols[$col]}, $value\n";
        switch (true) {
            // set to null and column is can be null...
            case (!isset($options['disable_null_strings']) && (strtolower($value) == 'null') && (!($cols[$col] & DB_DATAOBJECT_NOTNULL))):
            case (is_object($value) && is_a($value,'DB_DataObject_Cast')): 
                $this->$col = $value;
                return true;
                
            // fail on setting null on a not null field..
            case (!isset($options['disable_null_strings']) && (strtolower($value) == 'null') && ($cols[$col] & DB_DATAOBJECT_NOTNULL)):
                return false;
        
            case (($cols[$col] & DB_DATAOBJECT_DATE) &&  ($cols[$col] & DB_DATAOBJECT_TIME)):
                // empty values get set to '' (which is inserted/updated as NULl
                if (!$value) {
                    $this->$col = '';
                }
            
                if (is_numeric($value)) {
                    $this->$col = date('Y-m-d H:i:s', $value);
                    return true;
                }
              
                // eak... - no way to validate date time otherwise...
                $this->$col = (string) $value;
                return true;
            
            case ($cols[$col] & DB_DATAOBJECT_DATE):
                // empty values get set to '' (which is inserted/updated as NULl
                 
                if (!$value) {
                    $this->$col = '';
                    return true; 
                }
            
                if (is_numeric($value)) {
                    $this->$col = date('Y-m-d',$value);
                    return true;
                }
                 
                // try date!!!!
                require_once 'Date.php';
                $x = new Date($value);
                $this->$col = $x->format("%Y-%m-%d");
                return true;
            
            case ($cols[$col] & DB_DATAOBJECT_TIME):
                // empty values get set to '' (which is inserted/updated as NULl
                if (!$value) {
                    $this->$col = '';
                }
            
                $guess = strtotime($value);
                if ($guess != -1) {
                     $this->$col = date('H:i:s', $guess);
                    return $return = true;
                }
                // otherwise an error in type...
                return false;
            
            case ($cols[$col] & DB_DATAOBJECT_STR):
                
                $this->$col = (string) $value;
                return true;
                
            // todo : floats numerics and ints...
            default:
                $this->$col = $value;
                return true;
        }
    
    
    
    }
     /**
    * standard get* implementation.
    *
    *  with formaters..
    * supported formaters:  
    *   date/time : %d/%m/%Y (eg. php strftime) or pear::Date 
    *   numbers   : %02d (eg. sprintf)
    *  NOTE you will get unexpected results with times like 0000-00-00 !!!
    *
    *
    * 
    * @param   string       column of database
    * @param   format       foramt
    *
    * @return   true     Description
    * @access   public 
    * @see      DB_DataObject::_call(),strftime(),Date::format()
    */
    function toValue($col,$format = null) 
    {
        if (is_null($format)) {
            return $this->$col;
        }
        $cols = $this->table();
        switch (true) {
            case (($cols[$col] & DB_DATAOBJECT_DATE) &&  ($cols[$col] & DB_DATAOBJECT_TIME)):
                if (!$this->$col) {
                    return '';
                }
                $guess = strtotime($this->$col);
                if ($guess != -1) {
                    return strftime($format, $guess);
                }
                // eak... - no way to validate date time otherwise...
                return $this->$col;
            case ($cols[$col] & DB_DATAOBJECT_DATE):
                if (!$this->$col) {
                    return '';
                } 
                $guess = strtotime($this->$col);
                if ($guess != -1) {
                    return strftime($format,$guess);
                }
                // try date!!!!
                require_once 'Date.php';
                $x = new Date($this->$col);
                return $x->format($format);
                
            case ($cols[$col] & DB_DATAOBJECT_TIME):
                if (!$this->$col) {
                    return '';
                }
                $guess = strtotime($this->$col);
                if ($guess > -1) {
                    return strftime($format, $guess);
                }
                // otherwise an error in type...
                return $this->$col;
                
            case ($cols[$col] &  DB_DATAOBJECT_MYSQLTIMESTAMP):
                if (!$this->$col) {
                    return '';
                }
                require_once 'Date.php';
                
                $x = new Date($this->$col);
                
                return $x->format($format);
            
             
            case ($cols[$col] &  DB_DATAOBJECT_BOOL):
                
                if ($cols[$col] &  DB_DATAOBJECT_STR) {
                    // it's a 't'/'f' !
                    return ($this->$col === 't');
                }
                return (bool) $this->$col;
            
               
            default:
                return sprintf($format,$this->col);
        }
            

    }
    
    
    /* ----------------------- Debugger ------------------ */

    /**
     * Debugger. - use this in your extended classes to output debugging information.
     *
     * Uses DB_DataObject::DebugLevel(x) to turn it on
     *
     * @param    string $message - message to output
     * @param    string $logtype - bold at start
     * @param    string $level   - output level
     * @access   public
     * @return   none
     */
    function debug($message, $logtype = 0, $level = 1)
    {
        global $_DB_DATAOBJECT;

        if (empty($_DB_DATAOBJECT['CONFIG']['debug'])  || 
            (is_numeric($_DB_DATAOBJECT['CONFIG']['debug']) &&  $_DB_DATAOBJECT['CONFIG']['debug'] < $level)) {
            return;
        }
        // this is a bit flaky due to php's wonderfull class passing around crap..
        // but it's about as good as it gets..
        $class = (isset($this) && is_a($this,'DB_DataObject')) ? get_class($this) : 'DB_DataObject';
        
        if (!is_string($message)) {
            $message = print_r($message,true);
        }
        if (!is_numeric( $_DB_DATAOBJECT['CONFIG']['debug']) && is_callable( $_DB_DATAOBJECT['CONFIG']['debug'])) {
            return call_user_func($_DB_DATAOBJECT['CONFIG']['debug'], $class, $message, $logtype, $level);
        }
        
        if (!ini_get('html_errors')) {
            echo "$class   : $logtype       : $message\n";
            flush();
            return;
        }
        if (!is_string($message)) {
            $message = print_r($message,true);
        }
        $colorize = ($logtype == 'ERROR') ? '<font color="red">' : '<font>';
        echo "<code>{$colorize}<B>$class: $logtype:</B> ". nl2br(htmlspecialchars($message)) . "</font></code><BR>\n";
    }

    /**
     * sets and returns debug level
     * eg. DB_DataObject::debugLevel(4);
     *
     * @param   int     $v  level
     * @access  public
     * @return  none
     */
    function debugLevel($v = null)
    {
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        if ($v !== null) {
            $r = isset($_DB_DATAOBJECT['CONFIG']['debug']) ? $_DB_DATAOBJECT['CONFIG']['debug'] : 0;
            $_DB_DATAOBJECT['CONFIG']['debug']  = $v;
            return $r;
        }
        return isset($_DB_DATAOBJECT['CONFIG']['debug']) ? $_DB_DATAOBJECT['CONFIG']['debug'] : 0;
    }

    /**
     * Last Error that has occured
     * - use $this->_lastError or
     * $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
     *
     * @access  public
     * @var     object PEAR_Error (or false)
     */
    var $_lastError = false;

    /**
     * Default error handling is to create a pear error, but never return it.
     * if you need to handle errors you should look at setting the PEAR_Error callback
     * this is due to the fact it would wreck havoc on the internal methods!
     *
     * @param  int $message    message
     * @param  int $type       type
     * @param  int $behaviour  behaviour (die or continue!);
     * @access public
     * @return error object
     */
    function raiseError($message, $type = null, $behaviour = null)
    {
        global $_DB_DATAOBJECT;
        
        if ($behaviour == PEAR_ERROR_DIE && !empty($_DB_DATAOBJECT['CONFIG']['dont_die'])) {
            $behaviour = null;
        }
        $error = &PEAR::getStaticProperty('DB_DataObject','lastError');
        
        // this will never work totally with PHP's object model.
        // as this is passed on static calls (like staticGet in our case)

        if (isset($this) && is_object($this) && is_subclass_of($this,'db_dataobject')) {
            $this->_lastError = $error;
        }

        $_DB_DATAOBJECT['LASTERROR'] = $error;

        // no checks for production here?....... - we log  errors before we throw them.
        DB_DataObject::debug($message,'ERROR',1);
        
        
        if (PEAR::isError($message)) {
            $error = $message;
        } else {
            require_once 'DB/DataObject/Error.php';
            $error = PEAR::raiseError($message, $type, $behaviour,
                            $opts=null, $userinfo=null, 'DB_DataObject_Error'
                        );
        }
   
        return $error;
    }

    /**
     * Define the global $_DB_DATAOBJECT['CONFIG'] as an alias to  PEAR::getStaticProperty('DB_DataObject','options');
     *
     * After Profiling DB_DataObject, I discoved that the debug calls where taking
     * considerable time (well 0.1 ms), so this should stop those calls happening. as
     * all calls to debug are wrapped with direct variable queries rather than actually calling the funciton
     * THIS STILL NEEDS FURTHER INVESTIGATION
     *
     * @access   public
     * @return   object an error object
     */
    function _loadConfig()
    {
        global $_DB_DATAOBJECT;

        $_DB_DATAOBJECT['CONFIG'] = &PEAR::getStaticProperty('DB_DataObject','options');


    }
     /**
     * Free global arrays associated with this object.
     *
     *
     * @access   public
     * @return   none
     */
    function free() 
    {
        global $_DB_DATAOBJECT;
          
        if (isset($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid])) {
            unset($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid]);
        }
        if (isset($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid])) {     
            unset($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid]);
        }
        // clear the staticGet cache as well.
        $this->_clear_cache();
        // this is a huge bug in DB!
        if (isset($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->num_rows = array();
        }
        
    }
    
    
    /* ---- LEGACY BC METHODS - NOT DOCUMENTED - See Documentation on New Methods. ---*/
    
    function _get_table() { return $this->table(); }
    function _get_keys()  { return $this->keys();  }
    
    
    
    
}
// technially 4.3.2RC1 was broken!!
// looks like 4.3.3 may have problems too....
if (!defined('DB_DATAOBJECT_NO_OVERLOAD')) {

    if ((phpversion() != '4.3.2-RC1') && (version_compare( phpversion(), "4.3.1") > 0)) {
        if (version_compare( phpversion(), "5") < 0) {
           overload('DB_DataObject');
        } 
        $GLOBALS['_DB_DATAOBJECT']['OVERLOADED'] = true;
    }
}