try {
Element transformElement = this._transformObject.getElement();
Element _xsltElement =
XMLUtils.selectNode(transformElement.getFirstChild(),
XSLTSpecNS,"stylesheet", 0);
if (_xsltElement == null) {
Object exArgs[] = { "xslt:stylesheet", "Transform" };
throw new TransformationException("xml.WrongContent", exArgs);
}
TransformerFactory tFactory = TransformerFactory.newInstance();
// Process XSLT stylesheets in a secure manner
tFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
/*
* This transform requires an octet stream as input. If the actual
* input is an XPath node-set, then the signature application should
* attempt to convert it to octets (apply Canonical XML]) as described
* in the Reference Processing Model (section 4.3.3.2).
*/
Source xmlSource =
new StreamSource(new ByteArrayInputStream(input.getBytes()));
Source stylesheet;
/*
* This complicated transformation of the stylesheet itself is necessary
* because of the need to get the pure style sheet. If we simply say
* Source stylesheet = new DOMSource(this._xsltElement);
* whereby this._xsltElement is not the rootElement of the Document,
* this causes problems;
* so we convert the stylesheet to byte[] and use this as input stream
*/
{
ByteArrayOutputStream os = new ByteArrayOutputStream();
Transformer transformer = tFactory.newTransformer();
DOMSource source = new DOMSource(_xsltElement);
StreamResult result = new StreamResult(os);
transformer.transform(source, result);
stylesheet =
new StreamSource(new ByteArrayInputStream(os.toByteArray()));
}
Transformer transformer = tFactory.newTransformer(stylesheet);
if (baos==null) {
ByteArrayOutputStream baos1 = new ByteArrayOutputStream();
StreamResult outputTarget = new StreamResult(baos1);
transformer.transform(xmlSource, outputTarget);
return new XMLSignatureInput(baos1.toByteArray());
}
StreamResult outputTarget = new StreamResult(baos);
transformer.transform(xmlSource, outputTarget);
XMLSignatureInput output=new XMLSignatureInput((byte[])null);
output.setOutputStream(baos);
return output;
} catch (XMLSecurityException ex) {
Object exArgs[] = { ex.getMessage() };
throw new TransformationException("generic.EmptyMessage", exArgs, ex);
} catch (TransformerConfigurationException ex) {
Object exArgs[] = { ex.getMessage() };
throw new TransformationException("generic.EmptyMessage", exArgs, ex);
} catch (TransformerException ex) {
Object exArgs[] = { ex.getMessage() };
throw new TransformationException("generic.EmptyMessage", exArgs, ex);
}
