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<?php
namespace Elastica\Aggregation;
use Elastica\Exception\InvalidException;
use Elastica\Param;
abstract class AbstractAggregation extends Param
{
/**
* @var string The name of this aggregation
*/
protected $_name;
/**
* @var array Subaggregations belonging to this aggregation
*/
protected $_aggs = array();
/**
* @param string $name the name of this aggregation
*/
public function __construct($name)
{
$this->setName($name);
}
/**
* Set the name of this aggregation.
*
* @param string $name
*
* @return $this
*/
public function setName($name)
{
$this->_name = $name;
return $this;
}
/**
* Retrieve the name of this aggregation.
*
* @return string
*/
public function getName()
{
return $this->_name;
}
/**
* Retrieve all subaggregations belonging to this aggregation.
*
* @return array
*/
public function getAggs()
{
return $this->_aggs;
}
/**
* Add a sub-aggregation.
*
* @param AbstractAggregation $aggregation
*
* @throws \Elastica\Exception\InvalidException
*
* @return $this
*/
public function addAggregation(AbstractAggregation $aggregation)
{
if ($aggregation instanceof GlobalAggregation) {
throw new InvalidException('Global aggregators can only be placed as top level aggregators');
}
$this->_aggs[$aggregation->getName()] = $aggregation->toArray();
return $this;
}
/**
* @return array
*/
public function toArray()
{
$array = parent::toArray();
if (array_key_exists('global_aggregation', $array)) {
// compensate for class name GlobalAggregation
$array = array('global' => new \stdClass());
}
if (sizeof($this->_aggs)) {
$array['aggs'] = $this->_aggs;
}
return $array;
}
}
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