/**
* This creates a new <code>{@link Document}</code> from an existing <code>InputStream</code> by
* letting a DOM parser handle parsing using the supplied stream.
*
* @param in <code>InputStream</code> to parse.
* @param validate <code>boolean</code> to indicate if validation should occur.
* @return <code>Document</code> - instance ready for use.
* @throws IOException when I/O error occurs.
* @throws JDOMException when errors occur in parsing.
*/
public Document getDocument(InputStream in, boolean validate) throws IOException, JDOMException {
try {
// Load the parser class
Class parserClass = Class.forName("org.apache.xerces.parsers.DOMParser");
Object parser = parserClass.newInstance();
// Set validation
Method setFeature =
parserClass.getMethod("setFeature", new Class[] {java.lang.String.class, boolean.class});
setFeature.invoke(
parser, new Object[] {"http://xml.org/sax/features/validation", new Boolean(validate)});
// Set namespaces true
setFeature.invoke(
parser, new Object[] {"http://xml.org/sax/features/namespaces", new Boolean(true)});
// Set the error handler
if (validate) {
Method setErrorHandler =
parserClass.getMethod("setErrorHandler", new Class[] {ErrorHandler.class});
setErrorHandler.invoke(parser, new Object[] {new BuilderErrorHandler()});
}
// Parse the document
Method parse = parserClass.getMethod("parse", new Class[] {org.xml.sax.InputSource.class});
parse.invoke(parser, new Object[] {new InputSource(in)});
// Get the Document object
Method getDocument = parserClass.getMethod("getDocument", null);
Document doc = (Document) getDocument.invoke(parser, null);
return doc;
} catch (InvocationTargetException e) {
Throwable targetException = e.getTargetException();
if (targetException instanceof org.xml.sax.SAXParseException) {
SAXParseException parseException = (SAXParseException) targetException;
throw new JDOMException(
"Error on line "
+ parseException.getLineNumber()
+ " of XML document: "
+ parseException.getMessage(),
e);
} else if (targetException instanceof IOException) {
IOException ioException = (IOException) targetException;
throw ioException;
} else {
throw new JDOMException(targetException.getMessage(), e);
}
} catch (Exception e) {
throw new JDOMException(e.getClass().getName() + ": " + e.getMessage(), e);
}
}
/**
* Creates a SAX XMLReader.
*
* @return <code>XMLReader</code> a SAX2 parser.
* @throws Exception if no parser can be created.
*/
protected XMLReader createParser() throws Exception {
XMLReader parser = null;
// Try using JAXP...
// Note we need JAXP 1.1, and if JAXP 1.0 is all that's
// available then the getXMLReader call fails and we skip
// to the hard coded default parser
try {
Class factoryClass = Class.forName("javax.xml.parsers.SAXParserFactory");
// MODIFIED: Added (Class[]) and (Object[]) cast sentences in "null" parameters
// to avoid warnings during compilation
// factory = SAXParserFactory.newInstance();
Method newParserInstance = factoryClass.getMethod("newInstance", (Class[]) null);
Object factory = newParserInstance.invoke(null, (Object[]) null);
// jaxpParser = factory.newSAXParser();
Method newSAXParser = factoryClass.getMethod("newSAXParser", (Class[]) null);
Object jaxpParser = newSAXParser.invoke(factory, (Object[]) null);
// parser = jaxpParser.getXMLReader();
Class parserClass = jaxpParser.getClass();
Method getXMLReader = parserClass.getMethod("getXMLReader", (Class[]) null);
parser = (XMLReader) getXMLReader.invoke(jaxpParser, (Object[]) null);
} catch (ClassNotFoundException e) {
// e.printStackTrace();
} catch (InvocationTargetException e) {
// e.printStackTrace();
} catch (NoSuchMethodException e) {
// e.printStackTrace();
} catch (IllegalAccessException e) {
// e.printStackTrace();
}
// Check to see if we got a parser yet, if not, try to use a
// hard coded default
if (parser == null) {
parser = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
}
return parser;
}
