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https://issues.apache.org/jira/browse/COMPRESS-574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17322733#comment-17322733
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Peter Lee edited comment on COMPRESS-574 at 4/16/21, 9:04 AM:
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Hi [~gaellalire]. Thank you for your contributing!
_When you have a ZIP which contains N components and you want to let the user
choose which components it needs, you need to create 2^N - 1 ZIP._
_Also ZipOutputStream will never allow you to resume from a byte range, you
need to generate all previous data._
I'm confused a little bit about the descriptions above. What's the problem you
are trying to solve?
was (Author: peterlee):
Hi [~gaellalire]. Thank you for your contributing!
_When you have a ZIP which contains N components and you want to let the user
choose which components it needs, you need to create 2^N - 1 ZIP._
_Also ZipOutputStream will never allow you to resume from a byte range, you
need to generate all previous data._
I'm confused a little bit about the descriptions above. What's the problem you
are trying to solve?
> Byte range support in archive creation
> --------------------------------------
>
> Key: COMPRESS-574
> URL: https://issues.apache.org/jira/browse/COMPRESS-574
> Project: Commons Compress
> Issue Type: Improvement
> Components: Archivers
> Reporter: Gaël Lalire
> Priority: Minor
> Attachments: DynamicZip.java, DynamicZipTest.java
>
>
> When you have a ZIP which contains _N_ components and you want to let the
> user choose which components it needs, you need to create _2^N - 1_ ZIP.
> So the idea is to store each component once (or twice if you want both
> deflated and stored version), and create the ZIP on the fly.
> For the moment you can stream with a ZipOutputStream but if you need an
> InputStream things get a lot harder. I guess programs are writing the ZIP to
> a file system and read from it after, so not really a streaming anymore.
> Also ZipOutputStream will never allow you to resume from a byte range, you
> need to generate all previous data.
> So I made a class to do that, I think such functionality has its place in
> commons compress.
> You can see my code attached and adapt it for better integration / other
> archive type support or simply to get inspired.
>
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