[jira] [Work logged] (COMPRESS-540) Random access on Tar archive

[ASF GitHub Bot (Jira)]

     [ 
https://issues.apache.org/jira/browse/COMPRESS-540?focusedWorklogId=529274&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-529274
 ]

ASF GitHub Bot logged work on COMPRESS-540:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 29/Dec/20 21:44
            Start Date: 29/Dec/20 21:44
    Worklog Time Spent: 10m 
      Work Description: coveralls edited a comment on pull request #113:
URL: https://github.com/apache/commons-compress/pull/113#issuecomment-654645643


   
   [![Coverage 
Status](https://coveralls.io/builds/35994432/badge)](https://coveralls.io/builds/35994432)
   
   Coverage increased (+0.08%) to 87.357% when pulling 
**a0a3ff490dccef9a5a567e87c8e98562c3424d13 on 
theobisproject:random-access-tar** into 
**57bcd9b8af628bcb2933c7d80a7ed6e9c5d673e0 on apache:master**.
   


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 529274)
    Time Spent: 7h 40m  (was: 7.5h)

> Random access on Tar archive
> ----------------------------
>
>                 Key: COMPRESS-540
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-540
>             Project: Commons Compress
>          Issue Type: Improvement
>            Reporter: Robin Schimpf
>            Priority: Major
>          Time Spent: 7h 40m
>  Remaining Estimate: 0h
>
> The TarArchiveInputStream only provides sequential access. If only a small 
> amount of files from the archive is needed large amount of data in the input 
> stream needs to be skipped.
> Therefore I was working on a implementation to provide random access to 
> TarFiles equal to the ZipFile api. The basic idea behind the implementation 
> is the following
>  * Random access is backed by a SeekableByteChannel
>  * Read all headers of the tar file and save the place to the data of every 
> header
>  * User can request an input stream for any entry in the archive multiple 
> times



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