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https://issues.apache.org/jira/browse/COMPRESS-540?focusedWorklogId=528453&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-528453
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ASF GitHub Bot logged work on COMPRESS-540:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 25/Dec/20 20:38
Start Date: 25/Dec/20 20:38
Worklog Time Spent: 10m
Work Description: theobisproject commented on a change in pull request
#113:
URL: https://github.com/apache/commons-compress/pull/113#discussion_r548909890
##########
File path:
src/main/java/org/apache/commons/compress/archivers/tar/TarArchiveEntry.java
##########
@@ -553,6 +554,23 @@ public TarArchiveEntry(final byte[] headerBuf, final
ZipEncoding encoding, final
parseTarHeader(headerBuf, encoding, false, lenient);
}
+ /**
+ * Construct an entry from an archive's header bytes for random access
tar. File is set to null.
+ * @param headerBuf The header bytes from a tar archive entry.
+ * @param encoding encoding to use for file names
+ * @param lenient when set to true illegal values for group/userid, mode,
device numbers and timestamp will be
+ * ignored and the fields set to {@link #UNKNOWN}. When set to false such
illegal fields cause an exception instead.
+ * @param dataOffset Position of the entry data in the random access file
Review comment:
I formatted all the added Javadoc in `TarArchiveEntry` to start with
lower case letter and end with a period.
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Issue Time Tracking
-------------------
Worklog Id: (was: 528453)
Time Spent: 6h 10m (was: 6h)
> 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: 6h 10m
> 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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