Uwe Schindler created LUCENE-6653:
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Summary: Cleanup TermToBytesRefAttribute
Key: LUCENE-6653
URL: https://issues.apache.org/jira/browse/LUCENE-6653
Project: Lucene - Core
Issue Type: Improvement
Components: modules/analysis
Reporter: Uwe Schindler
Assignee: Uwe Schindler
Fix For: 5.3, Trunk
While working on LUCENE-6652, I figured out that there were so many test with
wrongly implemented TermsToBytesRefAttribute. In addition, the whole concept
back from Lucene 4.0 was no longer correct:
- We don't return the hash code anymore; it is calculated by BytesRefHash
- The interface is horrible to use. It tends to reuse the BytesRef instance but
the whole thing is not correct.
Instead we should remove the fillBytesRef() method from the interface and let
getBytesRef() populate and return the BytesRef. It does not matter if the
attribute reuses the BytesRef or returns a new one. It just get consumed like a
standard CharTermAttribute. You get a BytesRef and can use it until you call
incrementToken().
As the TermsToBytesRefAttribute is marked experimental, I see no reason to
change the semantics to be more easy to understand and behave like all other
attributes. I will add a note to the backwards incompatible changes in Lucene
5.3.
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