final public function format(DataControllerCallContext $callcontext, AbstractRequest $request, $datasetName, $columnName, $columnDataType = NULL) {
if (!isset($columnDataType)) {
$metamodel = data_controller_get_metamodel();
// trying to detect data type for the value
list($referencedDatasetName, $referencedColumnName) = ReferencePathHelper::splitReference($columnName);
$selectedDatasetName = isset($referencedDatasetName) ? $referencedDatasetName : $datasetName;
$selectedColumnName = isset($referencedColumnName) ? $referencedColumnName : $columnName;
$dataset = $metamodel->getDataset($selectedDatasetName);
$column = $dataset->findColumn($selectedColumnName);
// could be formula
if (!isset($column)) {
$column = $request->findFormula($selectedColumnName);
}
$columnDataType = isset($column) ? $column->type->applicationType : NULL;
// preparing column data type based on operator parameter data type
if (!isset($columnDataType) && ($this->operatorHandler instanceof ParameterBasedOperatorHandler)) {
$columnDataType = $this->operatorHandler->getParameterDataType();
}
}
return $this->prepareExpression($callcontext, $request, $datasetName, $columnName, $columnDataType);
}
