/**
* Prepare the transformation
*
* @param mixed $data Data to transform - xml or array or a file that contains the xml or the array
* @return string
*/
protected function getCleanedData($data = null)
{
if (is_string($data) && !preg_match('/^([\\s|\\t]*(<\\?xml\\s.*\\?>)|(<\\w+>))/i', $data) && !file_exists($data)) {
throw new Transform_Exception("File '{$data}' doesn't exists.");
}
if ($data instanceof Fs_Node) {
$data = $data->getContents();
}
if (is_array($data)) {
$data = Transform::to('xml', array('rootNodeName' => isset($this->rootNodeName) ? $this->rootNodeName : 'root'))->process($data);
}
return $data;
}
