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From "Stefan Bodewig (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COMPRESS-263) Add DEFLATE support
Date Fri, 13 Jun 2014 13:28:02 GMT

    [ https://issues.apache.org/jira/browse/COMPRESS-263?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14030613#comment-14030613
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Stefan Bodewig commented on COMPRESS-263:
-----------------------------------------

Thanks, I'll probably commit this during the weekend (minus the changes to the POM ;-) )

One thing I might quibble about is the name of isZlibHeaderPresent - this reads the wrong
way when applied to the writing side, where should...BePresent was more appropriate.  How
about withZlibHeader?

Also, do you think it possible to auto-detect the format, at least in the case where the stream
contains a ZLIB header?


> Add DEFLATE support
> -------------------
>
>                 Key: COMPRESS-263
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-263
>             Project: Commons Compress
>          Issue Type: New Feature
>          Components: Compressors
>            Reporter: Matthias Stevens
>              Labels: features
>             Fix For: 1.9
>
>         Attachments: COMPRESS-263_DeflateSupport.patch, COMPRESS-263_DeflateSupport_v1.1.patch,
bla.tar.deflate, bla.tar.deflatez
>
>
> GZIP is not a compression algorithm "as such". The de facto (and currently the only supported)
compression algorithm it uses is DEFLATE.
> GZIP adds a header of minimum 10 bytes and a footer of 8 bytes to a "deflated" data stream.
Find out more here: http://en.wikipedia.org/wiki/Gzip#File_format
> I have no problem with the current GZIP support, but it would be nice if CommonsCompress
would also have compression and decompression support for "raw" DEFLATE streams and DEFLATE
streams with the zlib header.
> Similarly to the GZIP support in CommonsCompress these functionality can be implemented
very easily using the standard java.util.zip package, as done in the provided patch.



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