# ProjectionChain.class.php

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    00001 <?php
    00002 /***************************************************************************
    00003  *   Copyright (C) 2006-2008 by Konstantin V. Arkhipov                     *
    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 ProjectionChain implements ObjectProjection
    00016     {
    00017         private $list = array();
    00018
    00022         public function add(ObjectProjection $projection, $name = null)
    00023         {
    00024             if ($name) {
    00025                 Assert::isFalse(isset($this->list[$name]));
    00026
    00027                 $this->list[$name] = $projection;
    00028             } else {
    00029                 $this->list[] = $projection;
    00030             }
    00031
    00032             return $this;
    00033         }
    00034
    00038         public function process(Criteria $criteria, JoinCapableQuery $query)
    00039         {
    00040             foreach ($this->list as $projection)
    00041                 $projection->process($criteria, $query);
    00042
    00043             return $query;
    00044         }
    00045
    00046         public function isEmpty()
    00047         {
    00048             return count($this->list) == 0;
    00049         }
    00050
    00054         public function dropByType(/* array */ $dropTypes)
    00055         {
    00056             $newList = array();
    00057
    00058             if (!is_array($dropTypes))
    00059                 $dropTypes = array($dropTypes);
    00060
    00061             foreach ($this->list as $name => &$projection) {
    00062                 $class = get_class($projection);
    00063
    00064                 if (!in_array($class, $dropTypes))
    00065                     $newList[$name] = $projection;
    00066             }
    00067
    00068             // swap
    00069             $this->list = $newList;
    00070
    00071             return $this;
    00072         }
    00073     }
    00074 ?>