Maven indexer does not support querying fields that are both STORED and ANALYZED

[Lambeaux]

Scope

Applies to experiment: https://github.com/connexta/osg-eyes/tree/mvn-indexing

Goal

What was the rationale for not supporting the following behavior?

Notes

The following warning message is logged:

<TYPE> type of querying for non-keyword (but stored) field <FIELD> was tried. 
Please review your code, or indexCreator involved, since this type of querying 
of this field is currently unsupported.

Refer to the follow lines for the precise location where the error occurs during query construction: https://github.com/apache/maven-indexer/blob/maven-indexer-6.0.0/indexer-core/src/main/java/org/apache/maven/index/DefaultQueryCreator.java#L239-L244

Note that the maven indexer is still using an older version of Lucene (5.5.5) and as a result some deprecated APIs. For reference, here are the relevant options for both storing and indexing a field:
https://github.com/apache/lucene-solr/blob/releases/lucene-solr/5.5.5/lucene/core/src/java/org/apache/lucene/document/Field.java#L654-L714

For some reason, the indexer does not support searching on Lucene fields that are both STORED and ANALYZED. Stored fields that are also indexed must be considered "keywords" (not sure if that's maven or lucene vernacular) and are only supported when indexed as NOT_ANALYZED. I suspect this has to do with tradeoffs of tokenization but I'm not 100% sure.

Leaving this issue around so it can be investigated later.