boolean isStreamSource = (null != source)
? (source instanceof StreamSource) : false;
if (isSAXSource || isStreamSource) {
XMLReader reader = null;
SAX2DTM dtm;
try {
InputSource xmlSource;
if (null == source) {
xmlSource = null;
} else {
reader = getXMLReader(source);
xmlSource = SAXSource.sourceToInputSource(source);
String urlOfSource = xmlSource.getSystemId();
if (null != urlOfSource) {
try {
urlOfSource = SystemIDResolver.getAbsoluteURI(urlOfSource);
} catch (Exception e) {
// %REVIEW% Is there a better way to send a warning?
System.err.println("Can not absolutize URL: " + urlOfSource);
}
xmlSource.setSystemId(urlOfSource);
}
}
if (source==null && unique && !incremental && !doIndexing) {
// Special case to support RTF construction into shared DTM.
// It should actually still work for other uses,
// but may be slightly deoptimized relative to the base
// to allow it to deal with carrying multiple documents.
//
// %REVIEW% This is a sloppy way to request this mode;
// we need to consider architectural improvements.
dtm = new SAX2RTFDTM(this, source, documentID, whiteSpaceFilter,
xstringFactory, doIndexing);
}
/**************************************************************
// EXPERIMENTAL 3/22/02
else if(JKESS_XNI_EXPERIMENT && m_incremental) {
dtm = new XNI2DTM(this, source, documentID, whiteSpaceFilter,
xstringFactory, doIndexing);
}
**************************************************************/
// Create the basic SAX2DTM.
else {
dtm = new SAX2DTM(this, source, documentID, whiteSpaceFilter,
xstringFactory, doIndexing);
}
// Go ahead and add the DTM to the lookup table. This needs to be
// done before any parsing occurs. Note offset 0, since we've just
// created a new DTM.
addDTM(dtm, dtmPos, 0);
boolean haveXercesParser =
(null != reader)
&& (reader.getClass()
.getName()
.equals("com.sun.org.apache.xerces.internal.parsers.SAXParser") );
if (haveXercesParser) {
incremental = true; // No matter what. %REVIEW%
}
// If the reader is null, but they still requested an incremental
// build, then we still want to set up the IncrementalSAXSource stuff.
if (m_incremental && incremental
/* || ((null == reader) && incremental) */) {
IncrementalSAXSource coParser=null;
if (haveXercesParser) {
// IncrementalSAXSource_Xerces to avoid threading.
try {
coParser =(IncrementalSAXSource)
Class.forName("com.sun.org.apache.xml.internal.dtm.ref.IncrementalSAXSource_Xerces").newInstance();
} catch( Exception ex ) {
ex.printStackTrace();
coParser=null;
}
}
if (coParser==null ) {
// Create a IncrementalSAXSource to run on the secondary thread.
if (null == reader) {
coParser = new IncrementalSAXSource_Filter();
} else {
IncrementalSAXSource_Filter filter =
new IncrementalSAXSource_Filter();
filter.setXMLReader(reader);
coParser=filter;
}
}
/**************************************************************
// EXPERIMENTAL 3/22/02
if (JKESS_XNI_EXPERIMENT && m_incremental &&
dtm instanceof XNI2DTM &&
coParser instanceof IncrementalSAXSource_Xerces) {
com.sun.org.apache.xerces.internal.xni.parser.XMLPullParserConfiguration xpc=
((IncrementalSAXSource_Xerces)coParser)
.getXNIParserConfiguration();
if (xpc!=null) {
// Bypass SAX; listen to the XNI stream
((XNI2DTM)dtm).setIncrementalXNISource(xpc);
} else {
// Listen to the SAX stream (will fail, diagnostically...)
dtm.setIncrementalSAXSource(coParser);
}
} else
***************************************************************/
// Have the DTM set itself up as IncrementalSAXSource's listener.
dtm.setIncrementalSAXSource(coParser);
if (null == xmlSource) {
// Then the user will construct it themselves.
return dtm;
}
if (null == reader.getErrorHandler()) {
reader.setErrorHandler(dtm);
}
reader.setDTDHandler(dtm);
try {
// Launch parsing coroutine. Launches a second thread,
// if we're using IncrementalSAXSource.filter().
coParser.startParse(xmlSource);
} catch (RuntimeException re) {
dtm.clearCoRoutine();
throw re;
} catch (Exception e) {
dtm.clearCoRoutine();
throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(e);
}
} else {
if (null == reader) {
// Then the user will construct it themselves.
return dtm;
}
// not incremental
reader.setContentHandler(dtm);
reader.setDTDHandler(dtm);
if (null == reader.getErrorHandler()) {
reader.setErrorHandler(dtm);
}
try {
reader.setProperty(
"http://xml.org/sax/properties/lexical-handler",
dtm);
} catch (SAXNotRecognizedException e){}
catch (SAXNotSupportedException e){}
try {
reader.parse(xmlSource);
} catch (RuntimeException re) {
dtm.clearCoRoutine();
throw re;
} catch (Exception e) {
dtm.clearCoRoutine();
throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(e);
}
}
if (DUMPTREE) {
System.out.println("Dumping SAX2DOM");
dtm.dumpDTM(System.err);
}
return dtm;
} finally {
// Reset the ContentHandler, DTDHandler, ErrorHandler to the DefaultHandler