/**
* @param ViewElement $viewElement
*/
public function evaluate(ViewElementTag $viewElement)
{
if ($this->function === null) {
//Instantiate the Function handler:
/** @var FunctionFactory[] $factories */
$factories = $viewElement->getView()->getFunctionFactories();
if (null != $factories && is_array($factories)) {
foreach ($factories as $factory) {
if (null !== ($this->function = $factory->lookup($this->name))) {
break;
}
}
}
if ($this->function == null) {
$logger = LoggerFactory::getLogger(__CLASS__);
$message = 'Undeclared function: ' . $this->name;
$logger->error($message);
throw new FunctionNotFoundException($this->name);
}
}
$arguments = array();
if ($this->operands) {
foreach ($this->operands as $operandToken) {
$arguments[] = $operandToken->evaluate($viewElement);
}
}
return $this->function->evaluate($viewElement, $this->arity, $arguments);
}
/**
* Representação textual da coluna.
*
* @return string
* */
public function render()
{
if ($this->_entity instanceof Entity) {
$column = $this->_name;
$columns = $this->_entity->columns();
if (FALSE == isset($columns->{$column}->database)) {
return FALSE;
}
$this->_name = $columns->{$column}->database;
}
if ($this->_functions) {
return $this->_functions->render();
}
return parent::render();
}
