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<?php
/*
* $Id$
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.doctrine-project.org>.
*/
/**
* Doctrine_Query_Filter_Chain
*
* @package Doctrine
* @subpackage Query
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.doctrine-project.org
* @since 1.0
* @version $Revision$
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Query_Filter_Chain
{
/**
* @var array $_filters an array of Doctrine_Query_Filter objects
*/
protected $_filters = array();
/**
* add
*
* @param Doctrine_Query_Filter $filter
* @return void
*/
public function add(Doctrine_Query_Filter $filter)
{
$this->_filters[] = $filter;
}
/**
* returns a Doctrine_Query_Filter on success
* and null on failure
*
* @param mixed $key
* @return mixed
*/
public function get($key)
{
if ( ! isset($this->_filters[$key])) {
throw new Doctrine_Query_Exception('Unknown filter ' . $key);
}
return $this->_filters[$key];
}
/**
* set
*
* @param mixed $key
* @param Doctrine_Query_Filter $listener
* @return void
*/
public function set($key, Doctrine_Query_Filter $listener)
{
$this->_filters[$key] = $listener;
}
/**
* preQuery
*
* Method for listening the preQuery method of Doctrine_Query and
* hooking into the query building procedure, doing any custom / specialized
* query building procedures that are neccessary.
*
* @return void
*/
public function preQuery(Doctrine_Query $query)
{
foreach ($this->_filters as $filter) {
$filter->preQuery($query);
}
}
/**
* postQuery
*
* Method for listening the postQuery method of Doctrine_Query and
* to hook into the query building procedure, doing any custom / specialized
* post query procedures (for example logging) that are neccessary.
*
* @return void
*/
public function postQuery(Doctrine_Query $query)
{
foreach ($this->_filters as $filter) {
$filter->postQuery($query);
}
}
}
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