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<?php
/**
* DaoManager class file.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2006 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package Demos
*/
/**
* DaoManager class.
*
* A Registry for Dao and an implementation of that type.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version $Id$
* @package Demos
* @since 3.1
*/
class DaoManager extends TModule
{
/**
* @var TSqlMapper sqlmap client
*/
private $_connection;
/**
* @var boolean if the module has been initialized
*/
private $_initialized=false;
/**
* @var array registered list of dao
*/
private $_dao=array();
/**
* Initializes the module.
* This method is required by IModule and is invoked by application.
* It loads dao information from the module configuration.
* @param TXmlElement module configuration
*/
public function init($config)
{
if($this->_connection === null)
throw new TimeTrackerException('daomanager_connection_required');
$app = $this->getApplication();
if(is_string($this->_connection))
{
if(($conn=$app->getModule($this->_connection)->getClient())===null)
throw new TimeTrackerException('daomanager_undefined_connection',$this->_connection);
if(!($conn instanceof TSqlMapper))
throw new TimeTrackerException('daomanager_invalid_connection', $this->_connection);
$this->_connection = $conn;
}
$this->includeDaoImplementation($config->getElementsByTagName('dao'));
$this->_initialized = true;
}
/**
* Register the dao type and implementation class names.
* @param array list of TXmlDocument nodes.
*/
protected function includeDaoImplementation($nodes)
{
foreach($nodes as $node)
{
$id = $node->getAttribute('id');
$class = $node->getAttribute('class');
$this->_dao[$id] = array('class' => $class);
}
}
/**
* @return array list of registered Daos
*/
public function getDaos()
{
return $this->_dao;
}
/**
* Returns an implementation of a Dao type, implements the Registery
* pattern. Multiple calls returns the same Dao instance.
* @param string Dao type to find.
* @return object instance of the Dao implementation.
*/
public function getDao($class)
{
if(isset($this->_dao[$class]))
{
if(!isset($this->_dao[$class]['instance']))
{
$dao = Prado::createComponent($this->_dao[$class]['class']);
$dao->setConnection($this->getConnection());
$this->_dao[$class]['instance'] = $dao;
}
return $this->_dao[$class]['instance'];
}
else
throw new TimeTrackerException('daomanager_undefined_dao', $class);
}
/**
* @return TSqlMapper sqlmap client instance
*/
public function getConnection()
{
return $this->_connection;
}
/**
* Sets the connection for all Daos registered.
* @param string|TSqlMapper sqlmap client module id or TSqlMapper instance.
*/
public function setConnection($client)
{
if($this->_initialized)
throw new TimeTrackerException('daomanager_unchangeable');
if(!is_string($client) && !($client instanceof TSqlMapper))
throw new TConfigurationException('daomanager_invalid_connection',$client);
$this->_connection = $client;
}
}
?>
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