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<?php
/**
* TActiveRecordManager and TActiveRecordEventParameter classes file.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2007 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package System.Data.ActiveRecord
*/
Prado::using('System.Data.TDbConnection');
Prado::using('System.Data.ActiveRecord.Exceptions.TActiveRecordException');
Prado::using('System.Data.ActiveRecord.TActiveRecordGateway');
Prado::using('System.Data.ActiveRecord.TActiveRecordStateRegistry');
/**
* TActiveRecordManager provides the default DB connection, default object state
* registry, default active record gateway, and table meta data inspector.
*
* You can provide a different registry by overriding the {@link createObjectStateRegistry()} method.
* Similarly, override {@link createRecordGateway()} for default gateway and override
* {@link createMetaDataInspector() }for meta data inspector.
*
* The default connection can be set as follows:
* <code>
* TActiveRecordManager::getInstance()->setDbConnection($conn);
* </code>
* All new active record created after setting the
* {@link DbConnection setDbConnection()} will use that connection.
*
* The {@link onInsert()}, {@link onUpdate()},
* {@link onDelete()} and {@link onSelect()} events are raised
* <b>before</b> their respective command are executed.
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @version $Id$
* @package System.Data.ActiveRecord
* @since 3.1
*/
class TActiveRecordManager extends TComponent
{
private $_objectRegistry;
private $_gateway;
private $_meta=array();
private $_connection;
/**
* @param TDbConnection default database connection
*/
public function setDbConnection($conn)
{
$this->_connection=$conn;
}
/**
* @return TDbConnection default database connection
*/
public function getDbConnection()
{
return $this->_connection;
}
/**
* @return TActiveRecordManager static instance of record manager.
*/
public static function getInstance()
{
static $instance;
if($instance===null)
$instance = new self;
return $instance;
}
/**
* @return TActiveRecordStateRegistry record object registry.
*/
public function getObjectStateRegistry()
{
if(is_null($this->_objectRegistry))
$this->_objectRegistry = $this->createObjectStateRegistry();
return $this->_objectRegistry;
}
/**
* @return TActiveRecordStateRegistry default object registry.
*/
protected function createObjectStateRegistry()
{
return new TActiveRecordStateRegistry();
}
/**
* @return TActiveRecordGateway record gateway.
*/
public function getRecordGateway()
{
if(is_null($this->_gateway))
$this->_gateway = $this->createRecordGateway();
return $this->_gateway;
}
/**
* @return TActiveRecordGateway default record gateway.
*/
protected function createRecordGateway()
{
return new TActiveRecordGateway($this);
}
/**
* Get table meta data for particular database and table.
* @param TDbConnection database connection.
* @return TDbMetaDataInspector table meta inspector
*/
public function getTableInspector(TDbConnection $conn)
{
$database = $conn->getConnectionString();
if(!isset($this->_meta[$database]))
$this->_meta[$database] = $this->createMetaDataInspector($conn);
return $this->_meta[$database];
}
/**
* Create an instance of a database meta inspector corresponding to the
* given database vendor specified by the $driver parameter.
* @param TDbConnection database connection
* @return TDbMetaDataInspector table meta inspector
*/
protected function createMetaDataInspector($conn)
{
$conn->setActive(true); //must be connected before retrieving driver name!
$driver = $conn->getDriverName();
switch(strtolower($driver))
{
case 'pgsql':
Prado::using('System.Data.ActiveRecord.Vendor.TPgsqlMetaDataInspector');
return new TPgsqlMetaDataInspector($conn);
case 'mysqli':
case 'mysql':
Prado::using('System.Data.ActiveRecord.Vendor.TMysqlMetaDataInspector');
return new TMysqlMetaDataInspector($conn);
case 'sqlite': //sqlite 3
case 'sqlite2': //sqlite 2
Prado::using('System.Data.ActiveRecord.Vendor.TSqliteMetaDataInspector');
return new TSqliteMetaDataInspector($conn);
default:
throw new TActiveRecordConfigurationException(
'ar_invalid_database_driver',$driver);
}
}
/**
* This method is invoked before the object is inserted into the database.
* The method raises 'OnInsert' event.
* If you override this method, be sure to call the parent implementation
* so that the event handlers can be invoked.
* @param TActiveRecordEventParameter event parameter to be passed to the event handlers
*/
public function onInsert($param)
{
$this->raiseEvent('OnInsert', $this, $param);
}
/**
* This method is invoked before the object is deleted from the database.
* The method raises 'OnDelete' event.
* If you override this method, be sure to call the parent implementation
* so that the event handlers can be invoked.
* @param TActiveRecordEventParameter event parameter to be passed to the event handlers
*/
public function onDelete($param)
{
$this->raiseEvent('OnDelete', $this, $param);
}
/**
* This method is invoked before the object data is updated in the database.
* The method raises 'OnUpdate' event.
* If you override this method, be sure to call the parent implementation
* so that the event handlers can be invoked.
* @param TActiveRecordEventParameter event parameter to be passed to the event handlers
*/
public function onUpdate($param)
{
$this->raiseEvent('OnUpdate', $this, $param);
}
/**
* This method is invoked before any select query is executed on the database.
* The method raises 'OnSelect' event.
* If you override this method, be sure to call the parent implementation
* so that the event handlers can be invoked.
* @param TActiveRecordEventParameter event parameter to be passed to the event handlers
*/
public function onSelect($param)
{
$this->raiseEvent('OnSelect', $this, $param);
}
}
/**
* TActiveRecordEventParameter class.
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @version $Id$
* @package System.Data.ActiveRecord
* @since 3.1
*/
class TActiveRecordEventParameter extends TEventParameter
{
}
?>
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