1 <?php

     2 /*

     3  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

     4  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

     5  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

     6  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

     7  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

     8  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

     9  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

    10  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    11  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    12  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    13  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    14  *

    15  * This software consists of voluntary contributions made by many individuals

    16  * and is licensed under the LGPL. For more information, see

    17  * <http://www.doctrine-project.org>.

    18  */

    19 

    20 namespace Doctrine\ORM\Query\AST;

    21 

    22 /**

    23  * NullIfExpression ::= "NULLIF" "(" ScalarExpression "," ScalarExpression ")"

    24  *

    25  * @since   2.1

    26  * @license http://www.opensource.org/licenses/lgpl-license.php LGPL

    27  * @link    www.doctrine-project.org

    28  * @author  Benjamin Eberlei <kontakt@beberlei.de>

    29  * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>

    30  * @author  Jonathan Wage <jonwage@gmail.com>

    31  * @author  Roman Borschel <roman@code-factory.org>

    32  */

    33 class NullIfExpression extends Node

    34 {

    35     public $firstExpression;

    36     

    37     public $secondExpression;

    38 

    39     public function __construct($firstExpression, $secondExpression)

    40     {

    41         $this->firstExpression  = $firstExpression;

    42         $this->secondExpression = $secondExpression;

    43     }    

    44     

    45     public function dispatch($sqlWalker)

    46     {

    47         return $sqlWalker->walkNullIfExpression($this);

    48     }

    49 }