Extract Query terms not by reader, but by using documents

[Vishnu Mishra <vd...@gmail.com>]

Hi all,
       Is this possible to extract Query Terms for particular Document. The
existing method extractTerms(Set<Term> term) expand the query search over
all the documents (IndexReader) which sometime takes long time to execute,
even I am Interested only in one Document. This case is much critical while
wildcard search.

       Set<Term> matchedTerms = new HashSet<Term>();
       query.rewrite(reader).extractTerms(matchedTerms);

    With this code the Term Set gets populated by the matched query in your
whole index. Is it possible to this with a document instead of the reader?
Something like

query.rewrite(documentId).extractTerms(matchedTerms) 

If anyone have Idea please share with me.

Thanks in advance.



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