QueryFactory.php

<?php

namespace Drupal\Core\Entity\Query\Null;

use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\Query\QueryBase;
use Drupal\Core\Entity\Query\QueryFactoryInterface;

/**
 * Provides a factory for creating entity query objects for the null backend.
 */
class QueryFactory implements QueryFactoryInterface {
    
    /**
     * The namespace of this class, the parent class etc.
     *
     * @var array
     */
    protected $namespaces;
    
    /**
     * Constructs a QueryFactory object.
     *
     * Initializes the list of namespaces used to locate query
     * classes for different entity types.
     */
    public function __construct() {
        $this->namespaces = QueryBase::getNamespaces($this);
    }
    
    /**
     * {@inheritdoc}
     */
    public function get(EntityTypeInterface $entity_type, $conjunction) {
        return new Query($entity_type, $conjunction, $this->namespaces);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getAggregate(EntityTypeInterface $entity_type, $conjunction) {
        return new Query($entity_type, $conjunction, $this->namespaces);
    }

}