<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\ORM\Query\AST;

/**
 * JoinAssociationDeclaration ::= JoinAssociationPathExpression ["AS"] AliasIdentificationVariable
 *
 * @link    www.doctrine-project.org
 * @since   2.3
 * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
 */
class JoinAssociationDeclaration extends Node
{
    /**
     * @var JoinAssociationPathExpression
     */
    public $joinAssociationPathExpression;

    /**
     * @var string
     */
    public $aliasIdentificationVariable;

    /**
     * @var IndexBy|null
     */
    public $indexBy;

    /**
     * @param JoinAssociationPathExpression $joinAssociationPathExpression
     * @param string                        $aliasIdentificationVariable
     * @param IndexBy|null                  $indexBy
     */
    public function __construct($joinAssociationPathExpression, $aliasIdentificationVariable, $indexBy)
    {
        $this->joinAssociationPathExpression = $joinAssociationPathExpression;
        $this->aliasIdentificationVariable   = $aliasIdentificationVariable;
        $this->indexBy                       = $indexBy;
    }

    /**
     * {@inheritdoc}
     */
    public function dispatch($sqlWalker)
    {
        return $sqlWalker->walkJoinAssociationDeclaration($this);
    }
}