Spellchecker "Suggest Mode" Support
-----------------------------------

                 Key: LUCENE-3436
                 URL: https://issues.apache.org/jira/browse/LUCENE-3436
             Project: Lucene - Java
          Issue Type: Improvement
          Components: modules/spellchecker
    Affects Versions: 3.3, 4.0
            Reporter: James Dyer
            Priority: Minor
             Fix For: 3.5, 4.0


This is a spin-off from SOLR-2585.

Currently o.a.l.s.s.SpellChecker and o.a.l.s.s.DirectSpellChecker support two 
"Suggest Modes":
1. Suggest for terms that are not in the index.
2. Suggest "more popular" terms.

This issue is to add a third Suggest Mode:
3. Suggest always.

This will assist users in developing context-sensitive spell suggestions and/or 
did-you-mean suggestions.  See SOLR-2585 for a full discussion.

Note that o.a.l.s.s.SpellChecker already can support this functionality, if the 
user passes in a NULL term & IndexReader.  This, however, is not intutive.  
o.a.l.s.s.DirectSpellChecker currently has no support for this third Suggest 
Mode.

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