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From Gary Gregory <>
Subject Re: [compress] Do we want formats without write support (Unix dump, maybe RAR)?
Date Tue, 09 Aug 2011 04:04:48 GMT
On Aug 8, 2011, at 23:26, Stefan Bodewig <> wrote:

> Hi,
> in JIRA Bear Giles has provided an ArchiveInputStream implementation for
> the Unix dump format.  AFAIU writing an output stream would be quite
> difficult in particular since the format requires information not
> available to Java and the road to JNI/JNA doesn't look like one I'd like
> to take right now.
> But read-only support could still be useful for some users.
> The RAR format is in the same boat for a different reason.  The format
> itself is not fully documented but a Java library exists to read RAR
> archives and its license - which explicitly prohibits using the code
> base to reverse-engineer write support - is listed as Category B
> <> [1]
> So what is the feeling in general, are read-only formats OK or do we
> want to only support formats that we can write as well?

Read only is ok to me. It would allow for conversion.


> Stefan
> [1] The link to the license is dead and some searching around indicates
> Sourceforge has kicked out the project because of its license.  The new
> home seems to be (according to Ohloh)
> <> and a different fork by Jukka
> Zitting - for use inside Apache Tika - exists as well at github.
> So far I have no idea how feasible an InputStream implementation based on
> the codebase would be.
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