[COMPRESS-601] Unpacking 7zip archives on Android

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 1.21
• Component/s: Compressors
• Assignee: Unassigned
• Reporter: Vladimir Ignjatijevic
• Created: 08/Dec/21 20:01
• Updated: 17/Mar/23 18:40

Description

Having some troubles unpacking a 7zip archive on Android using:

• org.apache.commons:commons-compress:1.21
• org.tukaani:xz:1.9

First I've tried with this archive:
https://kohina.duckdns.org/HVSC/HVSC_75-all-of-them.7z

I'm getting following exception:
java.io.IOException: Unsupported compression method [3, 4, 1]

From the creators of this archive I've found out that all files in this archive are compressed with BCJ2 LZMA except for some of them which are PPMd.

I was suggested to try this one which has only BCJ2 LZMA:
https://kohina.duckdns.org/HVSC/HVSC_74-all-of-them.7z

There I get the following exception:
java.io.IOException: Multi input/output stream coders are not yet supported

 

Am I doing something wrong or these methods are still not supported by SevenZip?