Re: how to parse XML documents?

Hi,
What I would suggest doing is this:
Write a class that encapsulates all the data/methods that you need.
Make sure that all sender/receivers have this class, and also make
sure that it is serializable. Then when its time to create a message,
all you need to do is to add and element to the Jxta message, and
inside of that serialize that object to a byte array. On the receiver
side you'll need to reconstruct that object from the byte array. This
has many advantages over the XML technique you described. Because it
is easier to implement and you send much less data over the wire. And
the LiteXMLDocument is in the impl package so its could change, you
don't want to write your code against something tha can change like
that. You should try to avoid anywayz :)
Even though the Jxta uses XML messages, you should avoid doing so, you
simply send too much data over the wire. If you'd like to save these
documents to an XML file then all you have to do is create a method
that will handle writing to a file and initalizing from file (or
stream). To do that I would suggest using either JAXB
(http://java.sun.com/xml/jaxb/) if you have an XSD that will not
change and the XML file is complicated. If the file is likely to
change and pretty simple I'd suggest you to use Digester
(http://jakarta.apache.org/commons/digester/).

Hope that helps,
Sayed

On 8/27/05, John D. Blair <[email protected]> wrote:
> I have been experimenting with JXTA and, while the learning curve has
> been steep, I am quite impressed.
> 
> However, I am having trouble working with XML documents.  I have
> created a document structure using the LiteXMLDocument which represents
> the data I want my peers to communicate with each other.  However, I
> cannot figure out how to parse these documents back into into
> LiteXMLDocuments.  I have been poring over the documentation, and as
> far as I can tell, there is no facility for doing this.
> 
> I have explored using the javax.xml.parsers object which comes in the
> Java library, but there still seems no way to get an XML document back
> into a LiteXMLDocument.
> 
> So, to be clear, my question is:
> Is there an existing way to parse an XML document and use it to
> populate a LiteXMLDocument (or a DOMXMLDocument)?
> 
> Am I missing something obvious?  Or is this by design?
> 
> Aside: I realize that it would be possible for me to construct my data
> structure using JXTA Message objects.  However, since the data has a
> life of its own outside of the JXTA context, I would like to keep the
> data encapsulated in a single format for its whole lifetime.
> 
> Please help!  Thanks.
> 
>   -john.
> 
> 
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