private CharSequence readFile(String href, String baseURI) throws XPathException {
try {
// Use resolver as it does a series of tasks for us, and use "binary" mode
final TransformerURIResolver resolver =
new TransformerURIResolver(
null, PipelineContext.get(), null, XMLParsing.ParserConfiguration.PLAIN, "binary");
final StringBuilder sb = new StringBuilder(1024);
// Get SAX source using crazy SAX API
// Source produces a binary document (content Base64-encoded)
final SAXSource source = (SAXSource) resolver.resolve(href, baseURI);
final XMLReader xmlReader = source.getXMLReader();
xmlReader.setContentHandler(
new XMLReceiverAdapter() {
public void characters(char ch[], int start, int length) throws SAXException {
// Append Base64-encoded text only
sb.append(ch, start, length);
}
});
xmlReader.parse(source.getInputSource());
// Return content formatted as Base64
return sb.toString();
} catch (Exception e) {
throw new XPathException(e);
}
}
private static void inputSourceToSAX(
InputSource inputSource,
XMLReceiver xmlReceiver,
XMLUtils.ParserConfiguration parserConfiguration,
boolean handleLexical) {
// Insert XInclude processor if needed
final TransformerURIResolver resolver;
if (parserConfiguration.handleXInclude) {
parserConfiguration =
new XMLUtils.ParserConfiguration(
parserConfiguration.validating,
false,
parserConfiguration.externalEntities,
parserConfiguration.uriReferences);
resolver = new TransformerURIResolver(XMLUtils.ParserConfiguration.PLAIN);
xmlReceiver =
new XIncludeReceiver(null, xmlReceiver, parserConfiguration.uriReferences, resolver);
} else {
resolver = null;
}
try {
final XMLReader xmlReader = newSAXParser(parserConfiguration).getXMLReader();
xmlReader.setContentHandler(xmlReceiver);
if (handleLexical) xmlReader.setProperty(XMLConstants.SAX_LEXICAL_HANDLER, xmlReceiver);
xmlReader.setEntityResolver(ENTITY_RESOLVER);
xmlReader.setErrorHandler(ERROR_HANDLER);
xmlReader.parse(inputSource);
} catch (SAXParseException e) {
throw new ValidationException(e.getMessage(), new LocationData(e));
} catch (Exception e) {
throw new OXFException(e);
} finally {
if (resolver != null) resolver.destroy();
}
}