[dom4j-user] How to parse large xml file with namespaces?

[Thomas Karopka]

Hi all,

I'm trying to parse a large xml-file (~500MB) that contains namespaces.
I tried it the way recommended in the cookbook (see code below) with
a few additional lines to register the namespaces
--->snippet
// register the namespaces
Map uris = new HashMap();
     uris.put( "x", "http://www.something.org/dtds/x.dtd#"; );
     uris.put( "y", "http://www.w3.org/1999/02/22-rdf-syntax-ns#"; );

     DocumentFactory factory = new DocumentFactory();
     factory.setXPathNamespaceURIs( uris );

     SAXReader reader = new SAXReader();
     reader.setDocumentFactory( factory );

       println("Parsing document:   " + url);
     println("Using Pruning Path: " + pruningPath);

     // enable pruning to call me back as each Element is complete
     reader.addHandler(pruningPath, this);

     println("##### starting parse");
     Document document = reader.read(url);
     println("##### finished parse");

<----end snippet


The main code to parse the document is from the dom4j FAQ how to handle
very large XML documents except that I added the namespaces

----> start snippet

SAXReader reader = new SAXReader();
reader.addHandler( "/x:ROWSET/y:ROW",
 new ElementHandler() {
     public void onStart(ElementPath path) {
         // do nothing here...         }
     public void onEnd(ElementPath path) {
         // process a ROW element
         Element row = path.getCurrent();
         Element rowSet = row.getParent();
         Document document = row.getDocument();
         ...
         // prune the tree
         row.detach();
     }
 }
);

Document document = reader.read(url);

----end snippet

The XML document looks something like this:

<x:ROWSET xmlns:x="http://www.something.org/x.dtd#";
xmlns:y="http://www.w3.org/1999/02/22-rdf-syntax-ns#";>
 <y:ROW id="1">
     ...
 </y:ROW>
 <y:ROW id="2">
     ...
 </y:ROW>
 ...
 <y:ROW id="N">
     ...
 </y:ROW>
</x:ROWSET> 
When I run the program the onStart and onEnd methods are not called.
What am I doing wrong?

Any help is greatly appreciated.

Thanks in advance,
Thomas



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