SQLBaseJoin.class.php

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00001 <?php
00002 /***************************************************************************
00003  *   Copyright (C) 2005-2007 by 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 /* $Id: SQLBaseJoin.class.php 4687 2007-12-09 18:57:18Z voxus $ */
00012 
00016     abstract class SQLBaseJoin implements SQLTableName, Aliased
00017     {
00018         protected $subject  = null;
00019         protected $alias    = null;
00020         protected $logic    = null;
00021 
00022         public function __construct($subject, LogicalObject $logic, $alias)
00023         {
00024             $this->subject  = $subject;
00025             $this->alias    = $alias;
00026             $this->logic    = $logic;
00027         }
00028         
00029         public function getAlias()
00030         {
00031             return $this->alias;
00032         }
00033 
00034         public function getTable()
00035         {
00036             return $this->alias ? $this->alias : $this->subject;
00037         }
00038         
00039         protected function baseToString(Dialect $dialect, $logic = null)
00040         {
00041             return
00042                 $logic.'JOIN '
00043                     .($this->subject instanceof DialectString
00044                         ?
00045                             $this->subject instanceof Query
00046                                 ? '('.$this->subject->toDialectString($dialect).')'
00047                                 : $this->subject->toDialectString($dialect)
00048                         : $dialect->quoteTable($this->subject)
00049                     )
00050                 .($this->alias ? ' AS '.$dialect->quoteTable($this->alias) : null)
00051                 .' ON '.$this->logic->toDialectString($dialect);
00052         }
00053     }
00054 ?>

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