HstoreExpression.class.php

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00001 <?php
00002 /***************************************************************************
00003  *   Copyright (C) 2009 by Sergey S. Sergeev                               *
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     
00016     final class HstoreExpression extends StaticFactory
00017     {
00018         const CONTAIN       = '?';
00019         const GET_VALUE     = '->';
00020         const LEFT_CONTAIN  = '@>';
00021         const CONCAT        = '||';
00022         
00026         public static function containKey($field, $key)
00027         {
00028             return new BinaryExpression($field, $key, self::CONTAIN);
00029         }
00030         
00034         public static function getValueByKey($field, $key)
00035         {
00036             return new BinaryExpression($field, $key, self::GET_VALUE);
00037         }
00038         
00042         public static function containValue($field, $key, $value)
00043         {
00044             return new BinaryExpression($field, "{$key}=>{$value}", self::LEFT_CONTAIN);
00045         }
00046         
00050         public static function concat($field, $value)
00051         {
00052             return new BinaryExpression($field, $value, self::CONCAT);
00053         }
00054         
00058         public static function containHstore($field, Hstore $hstore)
00059         {
00060             return new BinaryExpression($field, $hstore->toString(), self::LEFT_CONTAIN);
00061         }
00062         
00063         public static function containValueList($field, array $list)
00064         {
00065             return
00066                 self::containHstore(
00067                     $field,
00068                     Hstore::make($list)
00069                 );
00070         }
00071     }
00072 ?>