1 files changed, 541 insertions, 541 deletions
diff --git a/framework/Data/DataGateway/TDataGatewayCommand.php b/framework/Data/DataGateway/TDataGatewayCommand.php
index fa699979..299d39cd 100644
--- a/framework/Data/DataGateway/TDataGatewayCommand.php
+++ b/framework/Data/DataGateway/TDataGatewayCommand.php
@@ -1,541 +1,541 @@
-<?php
-/**
- * TDataGatewayCommand, TDataGatewayEventParameter and TDataGatewayResultEventParameter class file.
- *
- * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
- * @link http://www.pradosoft.com/
- * @copyright Copyright &copy; 2005-2012 PradoSoft
- * @license http://www.pradosoft.com/license/
- * @version $Id$
- * @package System.Data.DataGateway
- */
-
-/**
- * TDataGatewayCommand is command builder and executor class for
- * TTableGateway and TActiveRecordGateway.
- *
- * TDataGatewayCommand builds the TDbCommand for TTableGateway
- * and TActiveRecordGateway commands such as find(), update(), insert(), etc,
- * using the TDbCommandBuilder classes (database specific TDbCommandBuilder
- * classes are used).
- *
- * Once the command is built and the query parameters are binded, the
- * {@link OnCreateCommand} event is raised. Event handlers for the OnCreateCommand
- * event should not alter the Command property nor the Criteria property of the
- * TDataGatewayEventParameter.
- *
- * TDataGatewayCommand excutes the TDbCommands and returns the result obtained from the
- * database (returned value depends on the method executed). The
- * {@link OnExecuteCommand} event is raised after the command is executed and resulting
- * data is set in the TDataGatewayResultEventParameter object's Result property.
- *
- * @author Wei Zhuo <weizho[at]gmail[dot]com>
- * @version $Id$
- * @package System.Data.DataGateway
- * @since 3.1
- */
-class TDataGatewayCommand extends TComponent
-{
-	private $_builder;
-
-	/**
-	 * @param TDbCommandBuilder database specific database command builder.
-	 */
-	public function __construct($builder)
-	{
-		$this->_builder = $builder;
-	}
-
-	/**
-	 * @return TDbTableInfo
-	 */
-	public function getTableInfo()
-	{
-		return $this->_builder->getTableInfo();
-	}
-
-	/**
-	 * @return TDbConnection
-	 */
-	public function getDbConnection()
-	{
-		return $this->_builder->getDbConnection();
-	}
-
-	/**
-	 * @return TDbCommandBuilder
-	 */
-	public function getBuilder()
-	{
-		return $this->_builder;
-	}
-
-	/**
-	 * Executes a delete command.
-	 * @param TSqlCriteria delete conditions and parameters.
-	 * @return integer number of records affected.
-	 */
-	public function delete($criteria)
-	{
-		$where = $criteria->getCondition();
-		$parameters = $criteria->getParameters()->toArray();
-		$command = $this->getBuilder()->createDeleteCommand($where, $parameters);
-		$this->onCreateCommand($command,$criteria);
-		$command->prepare();
-		return $command->execute();
-	}
-
-	/**
-	 * Updates the table with new data.
-	 * @param array date for update.
-	 * @param TSqlCriteria update conditions and parameters.
-	 * @return integer number of records affected.
-	 */
-	public function update($data, $criteria)
-	{
-		$where = $criteria->getCondition();
-		$parameters = $criteria->getParameters()->toArray();
-		$command = $this->getBuilder()->createUpdateCommand($data,$where, $parameters);
-		$this->onCreateCommand($command,$criteria);
-		$command->prepare();
-		return $this->onExecuteCommand($command, $command->execute());
-	}
-
-	/**
-	 * @param array update for update
-	 * @param array primary key-value name pairs.
-	 * @return integer number of records affected.
-	 */
-	public function updateByPk($data, $keys)
-	{
-		list($where, $parameters) = $this->getPrimaryKeyCondition((array)$keys);
-		return $this->update($data, new TSqlCriteria($where, $parameters));
-	}
-
-	/**
-	 * Find one record matching the critera.
-	 * @param TSqlCriteria find conditions and parameters.
-	 * @return array matching record.
-	 */
-	public function find($criteria)
-	{
-		$command = $this->getFindCommand($criteria);
-		return $this->onExecuteCommand($command, $command->queryRow());
-	}
-
-	/**
-	 * Find one or more matching records.
-	 * @param TSqlCriteria $criteria
-	 * @return TDbDataReader record reader.
-	 */
-	public function findAll($criteria)
-	{
-		$command = $this->getFindCommand($criteria);
-		return $this->onExecuteCommand($command, $command->query());
-	}
-
-	/**
-	 * Build the find command from the criteria. Limit, Offset and Ordering are applied if applicable.
-	 * @param TSqlCriteria $criteria
-	 * @return TDbCommand.
-	 */
-	protected function getFindCommand($criteria)
-	{
-		if($criteria===null)
-			return $this->getBuilder()->createFindCommand();
-		$where = $criteria->getCondition();
-		$parameters = $criteria->getParameters()->toArray();
-		$ordering = $criteria->getOrdersBy();
-		$limit = $criteria->getLimit();
-		$offset = $criteria->getOffset();
-		$select = $criteria->getSelect();
-		$command = $this->getBuilder()->createFindCommand($where,$parameters,$ordering,$limit,$offset,$select);
-		$this->onCreateCommand($command, $criteria);
-		return $command;
-	}
-
-	/**
-	 * @param mixed primary key value, or composite key values as array.
-	 * @return array matching record.
-	 */
-	public function findByPk($keys)
-	{
-		list($where, $parameters) = $this->getPrimaryKeyCondition((array)$keys);
-		$command = $this->getBuilder()->createFindCommand($where, $parameters);
-		$this->onCreateCommand($command, new TSqlCriteria($where,$parameters));
-		return $this->onExecuteCommand($command, $command->queryRow());
-	}
-
-	/**
-	 * @param array multiple primary key values or composite value arrays
-	 * @return TDbDataReader record reader.
-	 */
-	public function findAllByPk($keys)
-	{
-		$where = $this->getCompositeKeyCondition((array)$keys);
-		$command = $this->getBuilder()->createFindCommand($where);
-		$this->onCreateCommand($command, new TSqlCriteria($where,$keys));
-		return $this->onExecuteCommand($command,$command->query());
-	}
-
-	public function findAllByIndex($criteria,$fields,$values)
-	{
-		$index = $this->getIndexKeyCondition($this->getTableInfo(),$fields,$values);
-		if(strlen($where = $criteria->getCondition())>0)
-			$criteria->setCondition("({$index}) AND ({$where})");
-		else
-			$criteria->setCondition($index);
-		$command = $this->getFindCommand($criteria);
-		$this->onCreateCommand($command, $criteria);
-		return $this->onExecuteCommand($command,$command->query());
-	}
-
-	/**
-	 * @param array multiple primary key values or composite value arrays
-	 * @return integer number of rows affected.
-	 */
-	public function deleteByPk($keys)
-	{
-		$where = $this->getCompositeKeyCondition((array)$keys);
-		$command = $this->getBuilder()->createDeleteCommand($where);
-		$this->onCreateCommand($command, new TSqlCriteria($where,$keys));
-		$command->prepare();
-		return $this->onExecuteCommand($command,$command->execute());
-	}
-
-	public function getIndexKeyCondition($table,$fields,$values)
-	{
-		if (!count($values))
-			return 'FALSE';
-		$columns = array();
-		$tableName = $table->getTableFullName();
-		foreach($fields as $field)
-			$columns[] = $tableName.'.'.$table->getColumn($field)->getColumnName();
-		return '('.implode(', ',$columns).') IN '.$this->quoteTuple($values);
-	}
-
-	/**
-	 * Construct a "pk IN ('key1', 'key2', ...)" criteria.
-	 * @param array values for IN predicate
-	 * @param string SQL string for primary keys IN a list.
-	 */
-	protected function getCompositeKeyCondition($values)
-	{
-		$primary = $this->getTableInfo()->getPrimaryKeys();
-		$count = count($primary);
-		if($count===0)
-		{
-			throw new TDbException('dbtablegateway_no_primary_key_found',
-				$this->getTableInfo()->getTableFullName());
-		}
-		if(!is_array($values) || count($values) === 0)
-		{
-			throw new TDbException('dbtablegateway_missing_pk_values',
-				$this->getTableInfo()->getTableFullName());
-		}
-		if($count>1 && (!isset($values[0]) || !is_array($values[0])))
-			$values = array($values);
-		if($count > 1 && count($values[0]) !== $count)
-		{
-			throw new TDbException('dbtablegateway_pk_value_count_mismatch',
-				$this->getTableInfo()->getTableFullName());
-		}
-		return $this->getIndexKeyCondition($this->getTableInfo(),$primary, $values);
-	}
-
-	/**
-	 * @param TDbConnection database connection.
-	 * @param array values
-	 * @return string quoted recursive tuple values, e.g. "('val1', 'val2')".
-	 */
-	protected function quoteTuple($array)
-	{
-		$conn = $this->getDbConnection();
-		$data = array();
-		foreach($array as $k=>$v)
-			$data[] = is_array($v) ? $this->quoteTuple($v) : $conn->quoteString($v);
-		return '('.implode(', ', $data).')';
-	}
-
-	/**
-	 * Create the condition and parameters for find by primary.
-	 * @param array primary key values
-	 * @return array tuple($where, $parameters)
-	 */
-	protected function getPrimaryKeyCondition($values)
-	{
-		$primary = $this->getTableInfo()->getPrimaryKeys();
-		if(count($primary)===0)
-		{
-			throw new TDbException('dbtablegateway_no_primary_key_found',
-				$this->getTableInfo()->getTableFullName());
-		}
-		$criteria=array();
-		$bindings=array();
-		$i = 0;
-		foreach($primary as $key)
-		{
-			$column = $this->getTableInfo()->getColumn($key)->getColumnName();
-			$criteria[] = $column.' = :'.$key;
-			$bindings[$key] = isset($values[$key])?$values[$key]:$values[$i++];
-		}
-		return array(implode(' AND ', $criteria), $bindings);
-	}
-
-	/**
-	 * Find one matching records for arbituary SQL.
-	 * @param TSqlCriteria $criteria
-	 * @return TDbDataReader record reader.
-	 */
-	public function findBySql($criteria)
-	{
-		$command = $this->getSqlCommand($criteria);
-		return $this->onExecuteCommand($command, $command->queryRow());
-	}
-
-	/**
-	 * Find zero or more matching records for arbituary SQL.
-	 * @param TSqlCriteria $criteria
-	 * @return TDbDataReader record reader.
-	 */
-	public function findAllBySql($criteria)
-	{
-		$command = $this->getSqlCommand($criteria);
-		return $this->onExecuteCommand($command, $command->query());
-	}
-
-	/**
-	 * Build sql command from the criteria. Limit, Offset and Ordering are applied if applicable.
-	 * @param TSqlCriteria $criteria
-	 * @return TDbCommand command corresponding to the criteria.
-	 */
-	protected function getSqlCommand($criteria)
-	{
-		$sql = $criteria->getCondition();
-		$ordering = $criteria->getOrdersBy();
-		$limit = $criteria->getLimit();
-		$offset = $criteria->getOffset();
-		if(count($ordering) > 0)
-			$sql = $this->getBuilder()->applyOrdering($sql, $ordering);
-		if($limit>=0 || $offset>=0)
-			$sql = $this->getBuilder()->applyLimitOffset($sql, $limit, $offset);
-		$command = $this->getBuilder()->createCommand($sql);
-		$this->getBuilder()->bindArrayValues($command, $criteria->getParameters()->toArray());
-		$this->onCreateCommand($command, $criteria);
-		return $command;
-	}
-
-	/**
-	 * @param TSqlCriteria $criteria
-	 * @return integer number of records.
-	 */
-	public function count($criteria)
-	{
-		if($criteria===null)
-			return (int)$this->getBuilder()->createCountCommand()->queryScalar();
-		$where = $criteria->getCondition();
-		$parameters = $criteria->getParameters()->toArray();
-		$ordering = $criteria->getOrdersBy();
-		$limit = $criteria->getLimit();
-		$offset = $criteria->getOffset();
-		$command = $this->getBuilder()->createCountCommand($where,$parameters,$ordering,$limit,$offset);
-		$this->onCreateCommand($command, $criteria);
-		return $this->onExecuteCommand($command, (int)$command->queryScalar());
-	}
-
-	/**
-	 * Inserts a new record into the table. Each array key must
-	 * correspond to a column name in the table unless a null value is permitted.
-	 * @param array new record data.
-	 * @return mixed last insert id if one column contains a serial or sequence,
-	 * otherwise true if command executes successfully and affected 1 or more rows.
-	 */
-	public function insert($data)
-	{
-		$command=$this->getBuilder()->createInsertCommand($data);
-		$this->onCreateCommand($command, new TSqlCriteria(null,$data));
-		$command->prepare();
-		if($this->onExecuteCommand($command, $command->execute()) > 0)
-		{
-			$value = $this->getLastInsertId();
-			return $value !== null ? $value : true;
-		}
-		return false;
-	}
-
-	/**
-	 * Iterate through all the columns and returns the last insert id of the
-	 * first column that has a sequence or serial.
-	 * @return mixed last insert id, null if none is found.
-	 */
-	public function getLastInsertID()
-	{
-		return $this->getBuilder()->getLastInsertID();
-	}
-
-	/**
-	 * @param string __call method name
-	 * @param string criteria conditions
-	 * @param array method arguments
-	 * @return TActiveRecordCriteria criteria created from the method name and its arguments.
-	 */
-	public function createCriteriaFromString($method, $condition, $args)
-	{
-		$fields = $this->extractMatchingConditions($method, $condition);
-		$args=count($args) === 1 && is_array($args[0]) ? $args[0] : $args;
-		if(count($fields)>count($args))
-		{
-			throw new TDbException('dbtablegateway_mismatch_args_exception',
-				$method,count($fields),count($args));
-		}
-		return new TSqlCriteria(implode(' ',$fields), $args);
-	}
-
-	/**
-	 * Calculates the AND/OR condition from dynamic method substrings using
-	 * table meta data, allows for any AND-OR combinations.
-	 * @param string dynamic method name
-	 * @param string dynamic method search criteria
-	 * @return array search condition substrings
-	 */
-	protected function extractMatchingConditions($method, $condition)
-	{
-		$table = $this->getTableInfo();
-		$columns = $table->getLowerCaseColumnNames();
-		$regexp = '/('.implode('|', array_keys($columns)).')(and|_and_|or|_or_)?/i';
-		$matches = array();
-		if(!preg_match_all($regexp, strtolower($condition), $matches,PREG_SET_ORDER))
-		{
-			throw new TDbException('dbtablegateway_mismatch_column_name',
-				$method, implode(', ', $columns), $table->getTableFullName());
-		}
-
-		$fields = array();
-		foreach($matches as $match)
-		{
-			$key = $columns[$match[1]];
-			$column = $table->getColumn($key)->getColumnName();
-			$sql = $column . ' = ? ';
-			if(count($match) > 2)
-				$sql .= strtoupper(str_replace('_', '', $match[2]));
-			$fields[] = $sql;
-		}
-		return $fields;
-	}
-
-	/**
-	 * Raised when a command is prepared and parameter binding is completed.
-	 * The parameter object is TDataGatewayEventParameter of which the
-	 * {@link TDataGatewayEventParameter::getCommand Command} property can be
-	 * inspected to obtain the sql query to be executed.
-	 * @param TDataGatewayCommand originator $sender
-	 * @param TDataGatewayEventParameter
-	 */
-	public function onCreateCommand($command, $criteria)
-	{
-		$this->raiseEvent('OnCreateCommand', $this, new TDataGatewayEventParameter($command,$criteria));
-	}
-
-	/**
-	 * Raised when a command is executed and the result from the database was returned.
-	 * The parameter object is TDataGatewayResultEventParameter of which the
-	 * {@link TDataGatewayEventParameter::getResult Result} property contains
-	 * the data return from the database. The data returned can be changed
-	 * by setting the {@link TDataGatewayEventParameter::setResult Result} property.
-	 * @param TDataGatewayCommand originator $sender
-	 * @param TDataGatewayResultEventParameter
-	 */
-	public function onExecuteCommand($command, $result)
-	{
-		$parameter = new TDataGatewayResultEventParameter($command, $result);
-		$this->raiseEvent('OnExecuteCommand', $this, $parameter);
-		return $parameter->getResult();
-	}
-}
-
-/**
- * TDataGatewayEventParameter class contains the TDbCommand to be executed as
- * well as the criteria object.
- *
- * @author Wei Zhuo <weizho[at]gmail[dot]com>
- * @version $Id$
- * @package System.Data.DataGateway
- * @since 3.1
- */
-class TDataGatewayEventParameter extends TEventParameter
-{
-	private $_command;
-	private $_criteria;
-
-	public function __construct($command,$criteria)
-	{
-		$this->_command=$command;
-		$this->_criteria=$criteria;
-	}
-
-	/**
-	 * The database command to be executed. Do not rebind the parameters or change
-	 * the sql query string.
-	 * @return TDbCommand command to be executed.
-	 */
-	public function getCommand()
-	{
-		return $this->_command;
-	}
-
-	/**
-	 * @return TSqlCriteria criteria used to bind the sql query parameters.
-	 */
-	public function getCriteria()
-	{
-		return $this->_criteria;
-	}
-}
-
-/**
- * TDataGatewayResultEventParameter contains the TDbCommand executed and the resulting
- * data returned from the database. The data can be changed by changing the
- * {@link setResult Result} property.
- *
- * @author Wei Zhuo <weizho[at]gmail[dot]com>
- * @version $Id$
- * @package System.Data.DataGateway
- * @since 3.1
- */
-class TDataGatewayResultEventParameter extends TEventParameter
-{
-	private $_command;
-	private $_result;
-
-	public function __construct($command,$result)
-	{
-		$this->_command=$command;
-		$this->_result=$result;
-	}
-
-	/**
-	 * @return TDbCommand database command executed.
-	 */
-	public function getCommand()
-	{
-		return $this->_command;
-	}
-
-	/**
-	 * @return mixed result returned from executing the command.
-	 */
-	public function getResult()
-	{
-		return $this->_result;
-	}
-
-	/**
-	 * @param mixed change the result returned by the gateway.
-	 */
-	public function setResult($value)
-	{
-		$this->_result=$value;
-	}
-}
-
-?>
+<?php
+/**
+ * TDataGatewayCommand, TDataGatewayEventParameter and TDataGatewayResultEventParameter class file.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2005-2012 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @version $Id$
+ * @package System.Data.DataGateway
+ */
+
+/**
+ * TDataGatewayCommand is command builder and executor class for
+ * TTableGateway and TActiveRecordGateway.
+ *
+ * TDataGatewayCommand builds the TDbCommand for TTableGateway
+ * and TActiveRecordGateway commands such as find(), update(), insert(), etc,
+ * using the TDbCommandBuilder classes (database specific TDbCommandBuilder
+ * classes are used).
+ *
+ * Once the command is built and the query parameters are binded, the
+ * {@link OnCreateCommand} event is raised. Event handlers for the OnCreateCommand
+ * event should not alter the Command property nor the Criteria property of the
+ * TDataGatewayEventParameter.
+ *
+ * TDataGatewayCommand excutes the TDbCommands and returns the result obtained from the
+ * database (returned value depends on the method executed). The
+ * {@link OnExecuteCommand} event is raised after the command is executed and resulting
+ * data is set in the TDataGatewayResultEventParameter object's Result property.
+ *
+ * @author Wei Zhuo <weizho[at]gmail[dot]com>
+ * @version $Id$
+ * @package System.Data.DataGateway
+ * @since 3.1
+ */
+class TDataGatewayCommand extends TComponent
+{
+	private $_builder;
+
+	/**
+	 * @param TDbCommandBuilder database specific database command builder.
+	 */
+	public function __construct($builder)
+	{
+		$this->_builder = $builder;
+	}
+
+	/**
+	 * @return TDbTableInfo
+	 */
+	public function getTableInfo()
+	{
+		return $this->_builder->getTableInfo();
+	}
+
+	/**
+	 * @return TDbConnection
+	 */
+	public function getDbConnection()
+	{
+		return $this->_builder->getDbConnection();
+	}
+
+	/**
+	 * @return TDbCommandBuilder
+	 */
+	public function getBuilder()
+	{
+		return $this->_builder;
+	}
+
+	/**
+	 * Executes a delete command.
+	 * @param TSqlCriteria delete conditions and parameters.
+	 * @return integer number of records affected.
+	 */
+	public function delete($criteria)
+	{
+		$where = $criteria->getCondition();
+		$parameters = $criteria->getParameters()->toArray();
+		$command = $this->getBuilder()->createDeleteCommand($where, $parameters);
+		$this->onCreateCommand($command,$criteria);
+		$command->prepare();
+		return $command->execute();
+	}
+
+	/**
+	 * Updates the table with new data.
+	 * @param array date for update.
+	 * @param TSqlCriteria update conditions and parameters.
+	 * @return integer number of records affected.
+	 */
+	public function update($data, $criteria)
+	{
+		$where = $criteria->getCondition();
+		$parameters = $criteria->getParameters()->toArray();
+		$command = $this->getBuilder()->createUpdateCommand($data,$where, $parameters);
+		$this->onCreateCommand($command,$criteria);
+		$command->prepare();
+		return $this->onExecuteCommand($command, $command->execute());
+	}
+
+	/**
+	 * @param array update for update
+	 * @param array primary key-value name pairs.
+	 * @return integer number of records affected.
+	 */
+	public function updateByPk($data, $keys)
+	{
+		list($where, $parameters) = $this->getPrimaryKeyCondition((array)$keys);
+		return $this->update($data, new TSqlCriteria($where, $parameters));
+	}
+
+	/**
+	 * Find one record matching the critera.
+	 * @param TSqlCriteria find conditions and parameters.
+	 * @return array matching record.
+	 */
+	public function find($criteria)
+	{
+		$command = $this->getFindCommand($criteria);
+		return $this->onExecuteCommand($command, $command->queryRow());
+	}
+
+	/**
+	 * Find one or more matching records.
+	 * @param TSqlCriteria $criteria
+	 * @return TDbDataReader record reader.
+	 */
+	public function findAll($criteria)
+	{
+		$command = $this->getFindCommand($criteria);
+		return $this->onExecuteCommand($command, $command->query());
+	}
+
+	/**
+	 * Build the find command from the criteria. Limit, Offset and Ordering are applied if applicable.
+	 * @param TSqlCriteria $criteria
+	 * @return TDbCommand.
+	 */
+	protected function getFindCommand($criteria)
+	{
+		if($criteria===null)
+			return $this->getBuilder()->createFindCommand();
+		$where = $criteria->getCondition();
+		$parameters = $criteria->getParameters()->toArray();
+		$ordering = $criteria->getOrdersBy();
+		$limit = $criteria->getLimit();
+		$offset = $criteria->getOffset();
+		$select = $criteria->getSelect();
+		$command = $this->getBuilder()->createFindCommand($where,$parameters,$ordering,$limit,$offset,$select);
+		$this->onCreateCommand($command, $criteria);
+		return $command;
+	}
+
+	/**
+	 * @param mixed primary key value, or composite key values as array.
+	 * @return array matching record.
+	 */
+	public function findByPk($keys)
+	{
+		list($where, $parameters) = $this->getPrimaryKeyCondition((array)$keys);
+		$command = $this->getBuilder()->createFindCommand($where, $parameters);
+		$this->onCreateCommand($command, new TSqlCriteria($where,$parameters));
+		return $this->onExecuteCommand($command, $command->queryRow());
+	}
+
+	/**
+	 * @param array multiple primary key values or composite value arrays
+	 * @return TDbDataReader record reader.
+	 */
+	public function findAllByPk($keys)
+	{
+		$where = $this->getCompositeKeyCondition((array)$keys);
+		$command = $this->getBuilder()->createFindCommand($where);
+		$this->onCreateCommand($command, new TSqlCriteria($where,$keys));
+		return $this->onExecuteCommand($command,$command->query());
+	}
+
+	public function findAllByIndex($criteria,$fields,$values)
+	{
+		$index = $this->getIndexKeyCondition($this->getTableInfo(),$fields,$values);
+		if(strlen($where = $criteria->getCondition())>0)
+			$criteria->setCondition("({$index}) AND ({$where})");
+		else
+			$criteria->setCondition($index);
+		$command = $this->getFindCommand($criteria);
+		$this->onCreateCommand($command, $criteria);
+		return $this->onExecuteCommand($command,$command->query());
+	}
+
+	/**
+	 * @param array multiple primary key values or composite value arrays
+	 * @return integer number of rows affected.
+	 */
+	public function deleteByPk($keys)
+	{
+		$where = $this->getCompositeKeyCondition((array)$keys);
+		$command = $this->getBuilder()->createDeleteCommand($where);
+		$this->onCreateCommand($command, new TSqlCriteria($where,$keys));
+		$command->prepare();
+		return $this->onExecuteCommand($command,$command->execute());
+	}
+
+	public function getIndexKeyCondition($table,$fields,$values)
+	{
+		if (!count($values))
+			return 'FALSE';
+		$columns = array();
+		$tableName = $table->getTableFullName();
+		foreach($fields as $field)
+			$columns[] = $tableName.'.'.$table->getColumn($field)->getColumnName();
+		return '('.implode(', ',$columns).') IN '.$this->quoteTuple($values);
+	}
+
+	/**
+	 * Construct a "pk IN ('key1', 'key2', ...)" criteria.
+	 * @param array values for IN predicate
+	 * @param string SQL string for primary keys IN a list.
+	 */
+	protected function getCompositeKeyCondition($values)
+	{
+		$primary = $this->getTableInfo()->getPrimaryKeys();
+		$count = count($primary);
+		if($count===0)
+		{
+			throw new TDbException('dbtablegateway_no_primary_key_found',
+				$this->getTableInfo()->getTableFullName());
+		}
+		if(!is_array($values) || count($values) === 0)
+		{
+			throw new TDbException('dbtablegateway_missing_pk_values',
+				$this->getTableInfo()->getTableFullName());
+		}
+		if($count>1 && (!isset($values[0]) || !is_array($values[0])))
+			$values = array($values);
+		if($count > 1 && count($values[0]) !== $count)
+		{
+			throw new TDbException('dbtablegateway_pk_value_count_mismatch',
+				$this->getTableInfo()->getTableFullName());
+		}
+		return $this->getIndexKeyCondition($this->getTableInfo(),$primary, $values);
+	}
+
+	/**
+	 * @param TDbConnection database connection.
+	 * @param array values
+	 * @return string quoted recursive tuple values, e.g. "('val1', 'val2')".
+	 */
+	protected function quoteTuple($array)
+	{
+		$conn = $this->getDbConnection();
+		$data = array();
+		foreach($array as $k=>$v)
+			$data[] = is_array($v) ? $this->quoteTuple($v) : $conn->quoteString($v);
+		return '('.implode(', ', $data).')';
+	}
+
+	/**
+	 * Create the condition and parameters for find by primary.
+	 * @param array primary key values
+	 * @return array tuple($where, $parameters)
+	 */
+	protected function getPrimaryKeyCondition($values)
+	{
+		$primary = $this->getTableInfo()->getPrimaryKeys();
+		if(count($primary)===0)
+		{
+			throw new TDbException('dbtablegateway_no_primary_key_found',
+				$this->getTableInfo()->getTableFullName());
+		}
+		$criteria=array();
+		$bindings=array();
+		$i = 0;
+		foreach($primary as $key)
+		{
+			$column = $this->getTableInfo()->getColumn($key)->getColumnName();
+			$criteria[] = $column.' = :'.$key;
+			$bindings[$key] = isset($values[$key])?$values[$key]:$values[$i++];
+		}
+		return array(implode(' AND ', $criteria), $bindings);
+	}
+
+	/**
+	 * Find one matching records for arbituary SQL.
+	 * @param TSqlCriteria $criteria
+	 * @return TDbDataReader record reader.
+	 */
+	public function findBySql($criteria)
+	{
+		$command = $this->getSqlCommand($criteria);
+		return $this->onExecuteCommand($command, $command->queryRow());
+	}
+
+	/**
+	 * Find zero or more matching records for arbituary SQL.
+	 * @param TSqlCriteria $criteria
+	 * @return TDbDataReader record reader.
+	 */
+	public function findAllBySql($criteria)
+	{
+		$command = $this->getSqlCommand($criteria);
+		return $this->onExecuteCommand($command, $command->query());
+	}
+
+	/**
+	 * Build sql command from the criteria. Limit, Offset and Ordering are applied if applicable.
+	 * @param TSqlCriteria $criteria
+	 * @return TDbCommand command corresponding to the criteria.
+	 */
+	protected function getSqlCommand($criteria)
+	{
+		$sql = $criteria->getCondition();
+		$ordering = $criteria->getOrdersBy();
+		$limit = $criteria->getLimit();
+		$offset = $criteria->getOffset();
+		if(count($ordering) > 0)
+			$sql = $this->getBuilder()->applyOrdering($sql, $ordering);
+		if($limit>=0 || $offset>=0)
+			$sql = $this->getBuilder()->applyLimitOffset($sql, $limit, $offset);
+		$command = $this->getBuilder()->createCommand($sql);
+		$this->getBuilder()->bindArrayValues($command, $criteria->getParameters()->toArray());
+		$this->onCreateCommand($command, $criteria);
+		return $command;
+	}
+
+	/**
+	 * @param TSqlCriteria $criteria
+	 * @return integer number of records.
+	 */
+	public function count($criteria)
+	{
+		if($criteria===null)
+			return (int)$this->getBuilder()->createCountCommand()->queryScalar();
+		$where = $criteria->getCondition();
+		$parameters = $criteria->getParameters()->toArray();
+		$ordering = $criteria->getOrdersBy();
+		$limit = $criteria->getLimit();
+		$offset = $criteria->getOffset();
+		$command = $this->getBuilder()->createCountCommand($where,$parameters,$ordering,$limit,$offset);
+		$this->onCreateCommand($command, $criteria);
+		return $this->onExecuteCommand($command, (int)$command->queryScalar());
+	}
+
+	/**
+	 * Inserts a new record into the table. Each array key must
+	 * correspond to a column name in the table unless a null value is permitted.
+	 * @param array new record data.
+	 * @return mixed last insert id if one column contains a serial or sequence,
+	 * otherwise true if command executes successfully and affected 1 or more rows.
+	 */
+	public function insert($data)
+	{
+		$command=$this->getBuilder()->createInsertCommand($data);
+		$this->onCreateCommand($command, new TSqlCriteria(null,$data));
+		$command->prepare();
+		if($this->onExecuteCommand($command, $command->execute()) > 0)
+		{
+			$value = $this->getLastInsertId();
+			return $value !== null ? $value : true;
+		}
+		return false;
+	}
+
+	/**
+	 * Iterate through all the columns and returns the last insert id of the
+	 * first column that has a sequence or serial.
+	 * @return mixed last insert id, null if none is found.
+	 */
+	public function getLastInsertID()
+	{
+		return $this->getBuilder()->getLastInsertID();
+	}
+
+	/**
+	 * @param string __call method name
+	 * @param string criteria conditions
+	 * @param array method arguments
+	 * @return TActiveRecordCriteria criteria created from the method name and its arguments.
+	 */
+	public function createCriteriaFromString($method, $condition, $args)
+	{
+		$fields = $this->extractMatchingConditions($method, $condition);
+		$args=count($args) === 1 && is_array($args[0]) ? $args[0] : $args;
+		if(count($fields)>count($args))
+		{
+			throw new TDbException('dbtablegateway_mismatch_args_exception',
+				$method,count($fields),count($args));
+		}
+		return new TSqlCriteria(implode(' ',$fields), $args);
+	}
+
+	/**
+	 * Calculates the AND/OR condition from dynamic method substrings using
+	 * table meta data, allows for any AND-OR combinations.
+	 * @param string dynamic method name
+	 * @param string dynamic method search criteria
+	 * @return array search condition substrings
+	 */
+	protected function extractMatchingConditions($method, $condition)
+	{
+		$table = $this->getTableInfo();
+		$columns = $table->getLowerCaseColumnNames();
+		$regexp = '/('.implode('|', array_keys($columns)).')(and|_and_|or|_or_)?/i';
+		$matches = array();
+		if(!preg_match_all($regexp, strtolower($condition), $matches,PREG_SET_ORDER))
+		{
+			throw new TDbException('dbtablegateway_mismatch_column_name',
+				$method, implode(', ', $columns), $table->getTableFullName());
+		}
+
+		$fields = array();
+		foreach($matches as $match)
+		{
+			$key = $columns[$match[1]];
+			$column = $table->getColumn($key)->getColumnName();
+			$sql = $column . ' = ? ';
+			if(count($match) > 2)
+				$sql .= strtoupper(str_replace('_', '', $match[2]));
+			$fields[] = $sql;
+		}
+		return $fields;
+	}
+
+	/**
+	 * Raised when a command is prepared and parameter binding is completed.
+	 * The parameter object is TDataGatewayEventParameter of which the
+	 * {@link TDataGatewayEventParameter::getCommand Command} property can be
+	 * inspected to obtain the sql query to be executed.
+	 * @param TDataGatewayCommand originator $sender
+	 * @param TDataGatewayEventParameter
+	 */
+	public function onCreateCommand($command, $criteria)
+	{
+		$this->raiseEvent('OnCreateCommand', $this, new TDataGatewayEventParameter($command,$criteria));
+	}
+
+	/**
+	 * Raised when a command is executed and the result from the database was returned.
+	 * The parameter object is TDataGatewayResultEventParameter of which the
+	 * {@link TDataGatewayEventParameter::getResult Result} property contains
+	 * the data return from the database. The data returned can be changed
+	 * by setting the {@link TDataGatewayEventParameter::setResult Result} property.
+	 * @param TDataGatewayCommand originator $sender
+	 * @param TDataGatewayResultEventParameter
+	 */
+	public function onExecuteCommand($command, $result)
+	{
+		$parameter = new TDataGatewayResultEventParameter($command, $result);
+		$this->raiseEvent('OnExecuteCommand', $this, $parameter);
+		return $parameter->getResult();
+	}
+}
+
+/**
+ * TDataGatewayEventParameter class contains the TDbCommand to be executed as
+ * well as the criteria object.
+ *
+ * @author Wei Zhuo <weizho[at]gmail[dot]com>
+ * @version $Id$
+ * @package System.Data.DataGateway
+ * @since 3.1
+ */
+class TDataGatewayEventParameter extends TEventParameter
+{
+	private $_command;
+	private $_criteria;
+
+	public function __construct($command,$criteria)
+	{
+		$this->_command=$command;
+		$this->_criteria=$criteria;
+	}
+
+	/**
+	 * The database command to be executed. Do not rebind the parameters or change
+	 * the sql query string.
+	 * @return TDbCommand command to be executed.
+	 */
+	public function getCommand()
+	{
+		return $this->_command;
+	}
+
+	/**
+	 * @return TSqlCriteria criteria used to bind the sql query parameters.
+	 */
+	public function getCriteria()
+	{
+		return $this->_criteria;
+	}
+}
+
+/**
+ * TDataGatewayResultEventParameter contains the TDbCommand executed and the resulting
+ * data returned from the database. The data can be changed by changing the
+ * {@link setResult Result} property.
+ *
+ * @author Wei Zhuo <weizho[at]gmail[dot]com>
+ * @version $Id$
+ * @package System.Data.DataGateway
+ * @since 3.1
+ */
+class TDataGatewayResultEventParameter extends TEventParameter
+{
+	private $_command;
+	private $_result;
+
+	public function __construct($command,$result)
+	{
+		$this->_command=$command;
+		$this->_result=$result;
+	}
+
+	/**
+	 * @return TDbCommand database command executed.
+	 */
+	public function getCommand()
+	{
+		return $this->_command;
+	}
+
+	/**
+	 * @return mixed result returned from executing the command.
+	 */
+	public function getResult()
+	{
+		return $this->_result;
+	}
+
+	/**
+	 * @param mixed change the result returned by the gateway.
+	 */
+	public function setResult($value)
+	{
+		$this->_result=$value;
+	}
+}
+
+?>