I started looking to implement a term collector (object that can get all the
terms for given query), and have couple of questions for someone more
familiar with code base:
(1) PrefixQuery does not extend MultiTermQuery (unlike FuzzyQuery and
WildcardQuery). Is there some specific reason for this, or was it just
implemented before other two (perhaps MultiTermQuery was added after
PrefixQuery?).
(2) RangeQuery does not extend MultiTermQuery either, should it?
(3) Like Doug pointed out, there are two distinct use cases; caller may want
to get either 'raw' terms (unprocessed terms, like "foo?ar") or terms
actually contained in any documents indexed ("foo?ar" might expand to
"foobar", "foogar" etc). However, there's also third interesting use case;
getting terms in a specific document. Is it likely implementing this might
be (relatively) easy? I'm not familiar enough with IndexReader to know for
sure.
-+ Tatu +-
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