<?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

 * 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 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);

    }

}