/**
* @static
* @return SQLOperatorFactory
*/
public static function getInstance()
{
if (!isset(self::$factory)) {
self::$factory = new DefaultSQLOperatorFactory();
}
return self::$factory;
}
protected function prepareExpression(DataControllerCallContext $callcontext, AbstractRequest $request, $datasetName, $columnName, $columnDataType)
{
$boundaryValue = $this->prepareBoundaryValue($callcontext, $request, $datasetName, $columnName, $columnDataType);
$operator = OperatorFactory::getInstance()->initiateHandler(EqualOperatorHandler::$OPERATOR__NAME, $boundaryValue);
$sqlOperatorHandler = SQLOperatorFactory::getInstance()->getHandler($this->datasourceHandler, $operator);
return $sqlOperatorHandler->format($callcontext, $request, $datasetName, $columnName, $columnDataType);
}
protected function getLatestValue(DataControllerCallContext $callcontext, AbstractRequest $request, $datasetName, $columnName) {
$latestValue = NULL;
if ($this->operatorHandler->wasValueCalculated(self::$OPERATOR_VARIABLE_NAME__LATEST)) {
$latestValue = $this->operatorHandler->getCalculatedValue(self::$OPERATOR_VARIABLE_NAME__LATEST);
}
else {
$operator = OperatorFactory::getInstance()->initiateHandler($this->getLatestOperatorName());
$sqlOperatorHandler = SQLOperatorFactory::getInstance()->getHandler($this->datasourceHandler, $operator);
$latestValue = $sqlOperatorHandler->prepareBoundaryValue($callcontext, $request, $datasetName, $columnName);
// storing into internal cache for further usage
$this->operatorHandler->setCalculatedValue(self::$OPERATOR_VARIABLE_NAME__LATEST, $latestValue);
}
return $latestValue;
}
public function formatOperatorValue(DataControllerCallContext $callcontext, AbstractRequest $request, $datasetName, $columnName, OperatorHandler $value)
{
$handler = SQLOperatorFactory::getInstance()->getHandler($this, $value);
return $handler->format($callcontext, $request, $datasetName, $columnName);
}
