How to search in Lucene using symbol synonims?

Question

I have been using lucene for text search in Danish language.

I have tried to implement something similar to "symbols synonym". I searched through lucene documentation but cannot find any Analyzer implementation that could help to search like this.

Text should be searched using this symbol synonym map: ø -> [ø, o, oe] å -> [å, a, aa] æ -> [æ, ae]

So word økse should be found using all following: økse , okse , oekse .

I would appreciate any help.

Answer 1

check out:

• MappingCharFilterFactory doc at https://lucene.apache.org/core/6_3_0/analyzers-common/org/apache/lucene/analysis/charfilter/MappingCharFilterFactory.html
• TokenFilterFactory doc: https://lucene.apache.org/core/6_3_0/analyzers-common/org/apache/lucene/analysis/util/TokenFilterFactory.html

At least one of them, or maybe both, should work