ComparisonExpression.php

<?php
/*
 *  $Id$
 *
 * 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
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 * 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 LGPL. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\ORM\Query\AST;

/**
 * ComparisonExpression ::= ArithmeticExpression ComparisonOperator ( QuantifiedExpression | ArithmeticExpression ) |
 *                          StringExpression ComparisonOperator (StringExpression | QuantifiedExpression) |
 *                          BooleanExpression ("=" | "<>" | "!=") (BooleanExpression | QuantifiedExpression) |
 *                          EnumExpression ("=" | "<>" | "!=") (EnumExpression | QuantifiedExpression) |
 *                          DatetimeExpression ComparisonOperator (DatetimeExpression | QuantifiedExpression) |
 *                          EntityExpression ("=" | "<>") (EntityExpression | QuantifiedExpression)
 *
 * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link    www.doctrine-project.org
 * @since   2.0
 * @version $Revision: 3938 $
 * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @author  Jonathan Wage <jonwage@gmail.com>
 * @author  Roman Borschel <roman@code-factory.org>
 */
class ComparisonExpression extends Node
{
    public $leftExpression;
    public $rightExpression;
    public $operator;

    public function __construct($leftExpr, $operator, $rightExpr)
    {
        $this->leftExpression = $leftExpr;
        $this->rightExpression = $rightExpr;
        $this->operator = $operator;
    }

    public function dispatch($sqlWalker)
    {
        return $sqlWalker->walkComparisonExpression($this);
    }
}