[JENA-601] Provide better support for compressed input formats

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Done
• Affects Version/s: Jena 2.11.0
• Component/s: RIOT
• Assignee: Unassigned
• Reporter: Rob Vesse
• Created: 04/Dec/13 14:13
• Updated: 13/Mar/22 13:09
• Resolved: 17/Apr/21 16:56

Description

Currently Jena has little or not support for compressed input formats. There are the odd cases where some consideration is given e.g.

• RDFLanguages.filenameToLang() strips off .gz extensions to help it correctly detect file types
• HTTP responses can deal with compressed responses by virtue of Apache HttpClient

What would be nice is to have a better strategy for handling compressed inputs. For example having a registry of known compression extensions e.g. .gz, .bz2, .deflate which ARQ would strip off when trying to deduce format from the filename.

It would also be useful if the various locator implementations took compression into account when opening input streams as I'm fairly sure if you asked ARQ to open a foo.nt.gz file it would just open a raw input stream and then the reading would fail.

Issue Links

• relates to: JENA-600 Fuseki Upload does not support compressed data e.g. GZip