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<?php
namespace Elastica\Suggest;
use Elastica\Suggest\CandidateGenerator\AbstractCandidateGenerator;
/**
* Class Phrase.
*
* @link http://www.elastic.co/guide/en/elasticsearch/reference/current/search-suggesters-phrase.html
*/
class Phrase extends AbstractSuggest
{
/**
* @param string $analyzer
*
* @return $this
*/
public function setAnalyzer($analyzer)
{
return $this->setParam('analyzer', $analyzer);
}
/**
* Set the max size of the n-grams (shingles) in the field.
*
* @param int $size
*
* @return $this
*/
public function setGramSize($size)
{
return $this->setParam('gram_size', $size);
}
/**
* Set the likelihood of a term being misspelled even if the term exists in the dictionary.
*
* @param float $likelihood Defaults to 0.95, meaning 5% of the words are misspelled.
*
* @return $this
*/
public function setRealWordErrorLikelihood($likelihood)
{
return $this->setParam('real_word_error_likelihood', $likelihood);
}
/**
* Set the factor applied to the input phrases score to be used as a threshold for other suggestion candidates.
* Only candidates which score higher than this threshold will be included in the result.
*
* @param float $confidence Defaults to 1.0.
*
* @return $this
*/
public function setConfidence($confidence)
{
return $this->setParam('confidence', $confidence);
}
/**
* Set the maximum percentage of the terms considered to be misspellings in order to form a correction.
*
* @param float $max
*
* @return $this
*/
public function setMaxErrors($max)
{
return $this->setParam('max_errors', $max);
}
/**
* @param string $separator
*
* @return $this
*/
public function setSeparator($separator)
{
return $this->setParam('separator', $separator);
}
/**
* Set suggestion highlighting.
*
* @param string $preTag
* @param string $postTag
*
* @return $this
*/
public function setHighlight($preTag, $postTag)
{
return $this->setParam('highlight', array(
'pre_tag' => $preTag,
'post_tag' => $postTag,
));
}
/**
* @param float $discount
*
* @return $this
*/
public function setStupidBackoffSmoothing($discount = 0.4)
{
return $this->setSmoothingModel('stupid_backoff', array(
'discount' => $discount,
));
}
/**
* @param float $alpha
*
* @return $this
*/
public function setLaplaceSmoothing($alpha = 0.5)
{
return $this->setSmoothingModel('laplace', array(
'alpha' => $alpha,
));
}
/**
* @param float $trigramLambda
* @param float $bigramLambda
* @param float $unigramLambda
*
* @return $this
*/
public function setLinearInterpolationSmoothing($trigramLambda, $bigramLambda, $unigramLambda)
{
return $this->setSmoothingModel('linear_interpolation', array(
'trigram_lambda' => $trigramLambda,
'bigram_lambda' => $bigramLambda,
'unigram_lambda' => $unigramLambda,
));
}
/**
* @param string $model the name of the smoothing model
* @param array $params
*
* @return $this
*/
public function setSmoothingModel($model, array $params)
{
return $this->setParam('smoothing', array(
$model => $params,
));
}
/**
* @param AbstractCandidateGenerator $generator
*
* @return $this
*/
public function addCandidateGenerator(AbstractCandidateGenerator $generator)
{
$generator = $generator->toArray();
$keys = array_keys($generator);
$values = array_values($generator);
return $this->addParam($keys[0], $values[0]);
}
}
|
