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<?php
namespace Elastica\Filter;
/**
* Returns parent documents having child docs matching the query.
*
* @author Fabian Vogler <fabian@equivalence.ch>
*
* @link http://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-has-child-filter.html
*/
class HasChild extends AbstractFilter
{
/**
* Construct HasChild filter.
*
* @param string|\Elastica\Query|\Elastica\Filter\AbstractFilter $query Query string or a Elastica\Query object or a filter
* @param string|\Elastica\Type $type Child document type
*/
public function __construct($query, $type = null)
{
$this->setType($type);
if ($query instanceof AbstractFilter) {
$this->setFilter($query);
} else {
$this->setQuery($query);
}
}
/**
* Sets query object.
*
* @param string|\Elastica\Query|\Elastica\Query\AbstractQuery $query
*
* @return $this
*/
public function setQuery($query)
{
$query = \Elastica\Query::create($query);
$data = $query->toArray();
return $this->setParam('query', $data['query']);
}
/**
* Sets the filter object.
*
* @param \Elastica\Filter\AbstractFilter $filter
*
* @return $this
*/
public function setFilter($filter)
{
return $this->setParam('filter', $filter->toArray());
}
/**
* Set type of the child document.
*
* @param string|\Elastica\Type $type Child document type
*
* @return $this
*/
public function setType($type)
{
if ($type instanceof \Elastica\Type) {
$type = $type->getName();
}
return $this->setParam('type', (string) $type);
}
/**
* Set minimum number of children are required to match for the parent doc to be considered a match.
*
* @param int $count
*
* @return $this
*/
public function setMinimumChildrenCount($count)
{
return $this->setParam('min_children', (int) $count);
}
/**
* Set maximum number of children are required to match for the parent doc to be considered a match.
*
* @param int $count
*
* @return $this
*/
public function setMaximumChildrenCount($count)
{
return $this->setParam('max_children', (int) $count);
}
}
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