XOM API for Processing XML with Java

[Wolfgang Hoschek <whoschek AT lbl.gov>]

On Jan 28, 2005, at 11:54 AM, Steve Loughran wrote:

> On Fri, 28 Jan 2005 10:36:35 -0800, Wolfgang Hoschek 
> <whoschek AT lbl.gov> wrote:
> > Steve,
> >
> > Any particular reason the BinaryXMLCodec wouldn't work here?
> > Using the codec in combination with RMI is a lot faster than any
> > standard Java serialization could ever be...
>
> I might have a look; I'd have to think a bit about marshalling stuff
> though, maybe writing a wrapper class to marshall the nodes. Yes, a
> NodeWrapper class would work -it would do the s12n and so my remote
> api could be
>
> NodeWrapper getNode() throws RemoteException;

Yep, something along the following lines:

NodeWrapper.java:

        private transient Document doc;

	private void writeObject(java.io.ObjectOutputStream out) throws 
IOException {
                out.defaultWriteObject();
                bytep[] data = new BinaryXMLCodec().serialize(doc, 0);
                out.writeInt(data.length);
                out.write(data);
        }

	private void readObject(java.io.ObjectInputStream in) throws 
IOException, ClassNotFoundException {
                in.defaultReadObject();
                byte[] data = new byte[in.readInt()];
                in.readFully(data, 0, data.length);
                doc = new BinaryXMLCodec().deserialize(data);
        }



> And the wrapper would have the custom marshall/unmarshall stuff. One
> question through: does the Codec handle incomplete things like a
> comment or an attribute?

What do you mean by incomplete? Currently it handles documents only. If 
you'd want to transmit just a comment node you'd have to copy the 
comment node and attach it to an empty document (plus some root 
element), marshall and then unwrap on the other side. It wouldn't be 
difficult to make the codec also handle subtrees, i.e. byte[] 
serialize(ParentNode). I thought about it before but never got round to 
do it. If you had a patch to that effect it would be most welcome :-)

Wolfgang.