I am attempting to write a set of POJO (Plain old java objects) to represent my data domain.

In a "server" environment they will be working with a database. Hibernate is ideal and the OQL is very usefull.

For code re-use I'd like to use the same POJO's in a "client" environment when they will be working (probably) with an XML document.

Does anyone know if I can use session.filter / or session.find calls on an object graph that has been created "outside" of Hibernate.

ARCHITECTUAL QUANDRY - XML Value Objects OR Hibernate POJO domain level.

The other option I have, is to trat the object graph as an XML dom and process everything with xPath statements. Unfortunately, I know of no XML <--> relational database persistence engine. So on the server side I will be writing a lot of JDBC code.

Dan

What about always using Hibernate on top of your POJO objects and just embedding HSQLDB with your client?

HSQLDB is a 100% pure java embeddable or standalone SQL database (open source) http://hsqldb.sourceforge.net/index.html. I believe there are other embeddable Java databases too.

Hi Stolley,

Ok, thanks. A great idea. Perhaps I should have thought of it too.

HSQLDB has a 160k footprint and uses disk based files.

So you have now solved my POJO Problem.

BUT, Architectural Quandry

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Client - Server Communication in XML

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I'd like to marshall my "data domain" (POJO objects with hibernate connection to mySQL) to xml documents and back again.

I have in the past used CASTOR.

But I see that JiBX and dom4j are also popular. Hibernate itself uses dom4J to run xml transformations.

Compatability with "maven" would be nice.

Any advice?

Thanks

Dan

I don't really have much that is valuable to say about the value object <-> XML mapping thing, since I've not done a lot of it myself. But I've heard that the Jakarta-commons Betwixt & Digester projects might be worth checking out.

Thanks Stolley,

I'm going to check out those commons projects. They look very interesting.

Dan

Err....

Hi Stolley,

I'm sorry about this extremely off topic question that has nothing at all to do with HIBERNATE.

I'm going on holiday to Australia in 2 months and was wondering if you knew anything about the following surfing info, because I don't know any Australians:

(a) type of wetsuit for a brisbane-sydney surfari in late november / or (b) the water temperature. And (c) I imagine it would be easy to buy some shortboards in Brisbane / Surfers Paradise, but what sort of price do boards go for?

Thanks,

Dan

a) long suite not required
b) 16-20 C
c) Not sure sorry,

Thanks, David.

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