If a developer uses Derby for storage this would get cumbersome. Zipping the derby DB directory is one approach, but that complicates application saves, crash recovery, etc.
That is what I had in mind. I read the Derby already offers read-only access to zipped files so thats already half way there right?
OOo uses a similar approach with its file format. The hsqldb jdbc driver is modified/extended to use an alternate IO stream which reads and writes to and from the compressed file. I don't have the source in front of me but from memory it works something like that.
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