/**
* Applies the result of the callback
*
* @param callback $callback A callback function
* @param mixed $targetName A fieldname or array of field names set to the output of the function
* @param mixed $targetKey Optional fields set by callback, otherwise callback should return array
* @param mixed $sourceName Optional parameter input names for the callback, passed in order
* @throws \MUtil\Model\Dependency\DependencyException
*/
public function __construct($callback, $targetName, $targetKey = null, $sourceName = null)
{
if (!is_callable($callback)) {
throw new DependencyException(__CLASS__ . " requires a valid callback.");
}
$this->_callback = $callback;
$this->_dependentOn = $sourceName;
if (is_array($targetName)) {
$this->_effecteds = array_fill_keys($targetName, (array) $targetKey);
} else {
$this->_effecteds[$targetName] = (array) $targetKey;
}
parent::__construct();
}
/**
* Is this field effected by this dependency?
*
* @param $name
* @return boolean
*/
public function isEffected($name)
{
$this->_checkEffected();
return parent::isEffected($name);
}