[LUCENE-786] Extended javadocs in spellchecker

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Component/s: general/javadocs
• Lucene Fields: New, Patch Available
• Assignee: Otis Gospodnetic
• Reporter: Karl Wettin
• Created: 26/Jan/07 14:56
• Updated: 28/Aug/22 11:34
• Resolved: 02/Mar/07 18:29

Description

Added some javadocs that explains why the spellchecker does not work as one might expect it to.

http://www.nabble.com/SpellChecker%3A%3AsuggestSimilar%28%29-Question-tf3118660.html#a8640395

> Without having looked at the code for a long time, I think the problem is what the
> lucene scoring consider to be best. First the grams are searched, resulting in a number
> of hits. Then the edit-distance is calculated on each hit. "Genetics" is appearently the
> third most similar hit according to Lucene, but the best according to Levenshtein.
>
> I.e. Lucene does not use edit-distance as similarity. You need to get a bunch of best hits
> in order to find the one with the smallest edit-distance.

I took a look at the code, and my assessment seems to be right.