File based spellcheck with doc frequencies supplied
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Key: LUCENE-1532
URL: https://issues.apache.org/jira/browse/LUCENE-1532
Project: Lucene - Java
Issue Type: New Feature
Components: contrib/spellchecker
Reporter: David Bowen
The file-based spellchecker treats all words in the dictionary as equally
valid, so it can suggest a very obscure word rather than a more common word
which is equally close to the misspelled word that was entered. It would be
very useful to have the option of supplying an integer with each word which
indicates its commonness. I.e. the integer could be the document frequency in
some index or set of indexes.
I've implemented a modification to the spellcheck API to support this by
defining a DocFrequencyInfo interface for obtaining the doc frequency of a
word, and a class which implements the interface by looking up the frequency in
an index. So Lucene users can provide alternative implementations of
DocFrequencyInfo. I could submit this as a patch if there is interest.
Alternatively, it might be better to just extend the spellcheck API to have a
way to supply the frequencies when you create a PlainTextDictionary, but that
would mean storing the frequencies somewhere when building the spellcheck
index, and I'm not sure how best to do that.
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