Hi Thom,On Dec 20, 2005, at 4:04 PM, Thomas Dudziak wrote:
Java Persistence and JDO have a huge synergy with DdlUtils. If you use DdlUtils as the repository of database schema, you can read the schema from a database and generate JDO or JP metadata and persistent classes from the DDU.
In the reverse direction, you can generate DDU from the JDO or JP classes and then create the schema from the DDU. The JDO project earlier looked at how to integrate DDU into the existing persistence model and concluded that it's some work but definitely no showstoppers.
Sounds good ! Does a XSLT suffice for JDO2 database metadata, or should DdlUtils (after 1.0) perhaps be able to read/write JDO2 database metadata ?
Today there is no JDO2 database metadata, only Java and persistence metadata. So there is no compatibility issue, we're talking about a greenfield project.
Once we are into the part of the project when we can look at this, there are a number of components that need to be implemented. We would probably want to build an interface and a memory model to read and write DDU; and then other components that will use the memory model to map to persistence and vice versa.
Regards,
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