[LUCENE-3830] MappingCharFilter could be improved by switching to an FST.

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.0-ALPHA
• Labels: gsoc2012 lucene-gsoc-12
• Lucene Fields: New
• Assignee: Michael McCandless
• Reporter: Dawid Weiss
• Created: 28/Feb/12 09:41
• Updated: 28/Aug/22 13:09
• Resolved: 06/May/12 13:14

Description

MappingCharFilter stores an overly complex tree-like structure for matching input patterns. The input is a union of fixed strings mapped to a set of fixed strings; an fst matcher would be ideal here and provide both memory and speed improvement I bet.

Issue Links

• is related to: LUCENE-3971 MappingCharFilter rarely has wrong correctOffset (for finalOffset)