# PostfixUnaryExpression.class.php

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    00001 <?php
    00002 /****************************************************************************
    00003  *   Copyright (C) 2004-2007 by Konstantin V. Arkhipov, Anton E. Lebedevich *
    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     final class PostfixUnaryExpression implements LogicalObject, MappableObject
    00016     {
    00017         const IS_NULL           = 'IS NULL';
    00018         const IS_NOT_NULL       = 'IS NOT NULL';
    00019
    00020         const IS_TRUE           = 'IS TRUE';
    00021         const IS_FALSE          = 'IS FALSE';
    00022
    00023         private $subject    = null;
    00024         private $logic      = null;
    00025
    00026         public function __construct($subject, $logic)
    00027         {
    00028             $this->subject  = $subject;
    00029             $this->logic    = $logic;
    00030         }
    00031
    00032         public function toDialectString(Dialect $dialect)
    00033         {
    00034             return
    00035                 '('
    00036                 .$dialect->toFieldString($this->subject)
    00037                 .' '.$this->logic
    00038                 .')';
    00039         }
    00040
    00044         public function toMapped(ProtoDAO $dao, JoinCapableQuery $query)
    00045         {
    00046             return new self(
    00047                 $dao->guessAtom($this->subject, $query),
    00048                 $this->logic
    00049             );
    00050         }
    00051
    00052         public function toBoolean(Form $form)
    00053         {
    00054             $subject = $form->toFormValue($this->subject);
    00055
    00056             switch ($this->logic) {
    00057                 case self::IS_NULL:
    00058                     return null === $subject;
    00059
    00060                 case self::IS_NOT_NULL:
    00061                     return null !== $subject;
    00062
    00063                 case self::IS_TRUE:
    00064                     return true === $subject;
    00065
    00066                 case self::IS_FALSE:
    00067                     return false === $subject;
    00068
    00069                 default:
    00070
    00071                     throw new UnsupportedMethodException(
    00072                         "'{$this->logic}' doesn't supported yet"
    00073                     );
    00074             }
    00075         }
    00076     }
    00077 ?>