static function __static()
{
self::$instance = new self();
}
/**
* Run the XSL transformation
*
* @return bool success
* @throws xml.TransformerException
*/
public function run()
{
libxml_get_last_error() && libxml_clear_errors();
$this->processor = new XSLTProcessor();
$this->processor->importStyleSheet($this->stylesheet);
$this->processor->setParameter('', $this->params);
// If we have registered instances, register them in XSLCallback
if (sizeof($this->_instances)) {
$cb = XSLCallback::getInstance();
foreach ($this->_instances as $name => $instance) {
$cb->registerInstance($name, $instance);
}
}
$this->processor->registerPHPFunctions(array('XSLCallback::invoke'));
if (NULL === ($this->outputEncoding = $this->determineOutputEncoding($this->stylesheet->documentElement, $this->baseURI))) {
$this->outputEncoding = 'utf-8';
// Use default
}
// Start transformation
$this->output = $this->processor->transformToXML($this->document);
// Perform cleanup when necessary (free singleton for further use)
sizeof($this->_instances) && XSLCallback::getInstance()->clearInstances();
// Check for transformation errors
if (FALSE === $this->output) {
// Check for errors, also non-fatal errors, otherwise indicate unknown
// transformation error
$this->_checkErrors(NULL, TRUE);
throw new TransformerException('Unknown XSL transformation error while transforming ' . $this->baseURI);
}
// Check for left-over errors that did not make the transformation fail
$this->_checkErrors('<transformation>');
return TRUE;
}
