# OqlQueryExpressionClause.class.php

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    00001 <?php
    00002 /****************************************************************************
    00003  *   Copyright (C) 2009 by Vladlen Y. Koshelev                              *
    00004  *                                                                          *
    00005  *   This program is free software; you can redistribute it and/or modify   *
    00006  *   it under the terms of the GNU Lesser General Public License as         *
    00007  *   published by the Free Software Foundation; either version 3 of the     *
    00008  *   License, or (at your option) any later version.                        *
    00009  *                                                                          *
    00010  ****************************************************************************/
    00011
    00015     abstract class OqlQueryExpressionClause extends OqlQueryClause
    00016     {
    00017         protected $expression = null;
    00018
    00022         public function getExpression()
    00023         {
    00024             return $this->expression;
    00025         }
    00026
    00030         public function setExpression(OqlQueryExpression $expression)
    00031         {
    00032             $this->checkExpression($expression);
    00033             $this->expression = $expression;
    00034
    00035             return $this;
    00036         }
    00037
    00038         public function toLogic()
    00039         {
    00040             Assert::isNotNull($this->expression);
    00041
    00042             return $this->expression->evaluate($this->parameters);
    00043         }
    00044
    00045         protected static function checkExpression(OqlQueryExpression $expression)
    00046         {
    00047         }
    00048     }
    00049 ?>