/**
* Transcodes the specified XML input in the specified output. All <code>TranscoderException
* </code> exceptions not catched previously are tagged as fatal errors (ie. call the <code>
* fatalError</code> method of the <code>ErrorHandler</code>).
*
* @param input the XML input to transcode
* @param output the ouput where to transcode
* @exception TranscoderException if an error occured while transcoding
*/
public void transcode(TranscoderInput input, TranscoderOutput output) throws TranscoderException {
Document document = null;
String uri = input.getURI();
if (input.getDocument() != null) {
document = input.getDocument();
} else {
String parserClassname = (String) hints.get(KEY_XML_PARSER_CLASSNAME);
String namespaceURI = (String) hints.get(KEY_DOCUMENT_ELEMENT_NAMESPACE_URI);
String documentElement = (String) hints.get(KEY_DOCUMENT_ELEMENT);
DOMImplementation domImpl = (DOMImplementation) hints.get(KEY_DOM_IMPLEMENTATION);
if (parserClassname == null) {
parserClassname = XMLResourceDescriptor.getXMLParserClassName();
}
if (domImpl == null) {
handler.fatalError(
new TranscoderException("Unspecified transcoding hints: KEY_DOM_IMPLEMENTATION"));
return;
}
if (namespaceURI == null) {
handler.fatalError(
new TranscoderException(
"Unspecified transcoding hints: KEY_DOCUMENT_ELEMENT_NAMESPACE_URI"));
return;
}
if (documentElement == null) {
handler.fatalError(
new TranscoderException("Unspecified transcoding hints: KEY_DOCUMENT_ELEMENT"));
return;
}
// parse the XML document
DocumentFactory f = createDocumentFactory(domImpl, parserClassname);
Object xmlParserValidating = hints.get(KEY_XML_PARSER_VALIDATING);
boolean validating =
xmlParserValidating != null && ((Boolean) xmlParserValidating).booleanValue();
f.setValidating(validating);
try {
if (input.getInputStream() != null) {
document =
f.createDocument(
namespaceURI, documentElement, input.getURI(), input.getInputStream());
} else if (input.getReader() != null) {
document =
f.createDocument(namespaceURI, documentElement, input.getURI(), input.getReader());
} else if (input.getXMLReader() != null) {
document =
f.createDocument(namespaceURI, documentElement, input.getURI(), input.getXMLReader());
} else if (uri != null) {
document = f.createDocument(namespaceURI, documentElement, uri);
}
} catch (DOMException ex) {
handler.fatalError(new TranscoderException(ex));
} catch (IOException ex) {
handler.fatalError(new TranscoderException(ex));
}
}
// call the dedicated transcode method
if (document != null) {
try {
transcode(document, uri, output);
} catch (TranscoderException ex) {
// at this time, all TranscoderExceptions are fatal errors
handler.fatalError(ex);
return;
}
}
}
