private void doTransform(InputStream istream, File dataFile, File outputFile, String baseUrl)
throws SaxonApiException, TransformerFactoryConfigurationError, TransformerException {
InputStream stylesheetUri = Jats2Spar.class.getResourceAsStream(RESOURCE_JATS2SPAR_XSL);
Processor proc = new Processor(false);
XsltCompiler comp = proc.newXsltCompiler();
XsltExecutable exec;
exec = comp.compile(new StreamSource(stylesheetUri));
XsltTransformer transformer = exec.load();
DocumentBuilder saxBuilder = proc.newDocumentBuilder();
saxBuilder.setLineNumbering(true);
saxBuilder.setDTDValidation(false);
XdmNode source = saxBuilder.build(new StreamSource(istream));
Serializer serializer = new Serializer();
serializer.setOutputProperty(Serializer.Property.INDENT, "yes");
serializer.setOutputFile(outputFile);
transformer.setParameter(new QName("baseUri"), new XdmAtomicValue(baseUrl));
transformer.setInitialContextNode(source);
transformer.setDestination(serializer);
transformer.setMessageListener(
new MessageListener() {
@Override
public void message(XdmNode arg0, boolean arg1, SourceLocator arg2) {
log.warn(
String.format(
"Transformation Error: %s\n Line Number: %s", arg0, arg2.getLineNumber()));
}
});
transformer.transform();
log.info(String.format("Finished xslt transformation for file: %s", dataFile));
}
@Override
public Sequence call(XPathContext context, Sequence[] arguments) throws XPathException {
NodeInfo stylesheet = (NodeInfo) arguments[0].head();
NodeInfo node = (NodeInfo) arguments[1].head();
Evaluator eval = SearchBase.getEvaluator(context);
XsltCompiler xsltCompiler = eval.getCompiler().getXsltCompiler();
xsltCompiler.setErrorListener(eval.getErrorListener());
try {
// TODO: cache compiled xslt somewhere
XsltExecutable xsltexec = xsltCompiler.compile(stylesheet);
transformer = xsltexec.load();
transformer.setSource(node);
transformer.setErrorListener(eval.getErrorListener());
if (arguments.length > 2) {
bindParameters(arguments[2]);
}
XdmDestination dest = new XdmDestination();
transformer.setDestination(dest);
transformer.transform();
ArrayList<TransformerException> runtimeErrors =
((TransformErrorListener) transformer.getErrorListener()).getErrors();
if (!runtimeErrors.isEmpty()) {
throw new XPathException(
runtimeErrors.get(0).getMessage(),
runtimeErrors.get(0).getLocator(),
runtimeErrors.get(0));
}
XdmNode result = dest.getXdmNode();
if (result == null) {
return EmptySequence.getInstance();
}
return result.getUnderlyingNode();
} catch (SaxonApiException e) {
throw new XPathException(e);
}
}