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Subject: Re: [ebxml-dev] DB mapping
Vladimir inquired: > Is there any reasonable mapping algorithm for automatic transformation of > entites stored in relatinoal DB into entites stored at Object-Oriented > DB? Yes....it's called Object to Relational Mapping (O/R Mapping) and there are a number of excellent commercial and open source tools out there that do just this. TopLINK is one of the best products for this....and is now part of Oracle's kit bag. I believe you can get a free download. It's a very powerful tool that can meet the needs of commercial systems, but the caveat is that the learning curve can be steep. With power comes complexity, typically. Another is CocoBase. I've heard good things about it as well. There is an open source solution called Castor that builds on the Sun JDO specification. My partner and I used this in our Mobile GPS Demo Platform (MGDP) project (details on that at http://www.chaeron.com/gps.html for those that want a break from B2B/ebXML....some kewl hardware in this project). So as you can see...there are a number of good solutions to this problem space. None of them typically use "automatic" mapping. That typically results in poor mappings and even worse performance. All of these tools require that someone knowledgeable about both the relational and object sides can create the mapping information. But after that, the process of persisting objects is pretty much transparent and "automatic". Hope this helps... Andrzej Jan Taramina Chaeron Corporation: Enterprise System Solutions http://www.chaeron.com
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