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<?php
/**
* TDbMetaDataInspector class 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.Vendor
*/
/**
* Base class for database meta data inspectors.
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @version $Id$
* @package System.Data.ActiveRecord.Vendor
* @since 3.1
*/
abstract class TDbMetaDataInspector
{
private $_connection;
public function __construct($conn)
{
$this->setDbConnection($conn);
}
/**
* @param TDbConnection database connection.
*/
public function setDbConnection($conn)
{
$this->_connection=$conn;
}
/**
* @return TDbConnection database connection.
*/
public function getDbConnection()
{
return $this->_connection;
}
/**
* @param string table name
* @return TDbMetaData table meta data.
*/
public function getTableMetaData($table)
{
$keys = $this->getConstraintKeys($table);
$columns = $this->getColumnDefinitions($table);
return $this->createMetaData($table,$columns,$keys['primary'], $keys['foreign']);
}
/**
* Get the column definitions for given table.
* @param string table name.
* @return array column name value pairs of column meta data.
*/
abstract protected function getColumnDefinitions($table);
/**
* Gets the primary and foreign key details for the given table.
* @param string table name.
* @return array key value pairs with keys 'primary' and 'foreign'.
*/
abstract protected function getConstraintKeys($table);
/**
* Create a new instance of meta data.
* @param string table name
* @param array column meta data
* @param array primary key meta data
* @param array foreign key meta data.
* @return TDbMetaData table meta data.
*/
abstract protected function createMetaData($table, $columns, $primary, $foreign);
}
?>
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