[LUCENE-2912] remove field param from computeNorm, scorePayload ; remove UOE'd lengthNorm, switch SweetSpot to per-field

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0-ALPHA
• Lucene Fields: New, Patch Available
• Assignee: Robert Muir
• Reporter: Robert Muir
• Created: 09/Feb/11 18:52
• Updated: 10/May/13 10:43
• Resolved: 11/Feb/11 23:16

Description

In LUCENE-2236 we switched sim to per field (SimilarityProvider returns a per-field similarity).

But we didn't completely cleanup there... I think we should now do this:

• SweetSpotSimilarity loses all its hashmaps. Instead, just configure one per field and return it in your SimilarityProvider. this means for example, all its TF factors can now be configured per-field too, not just the length normalization factors.
• computeNorm and scorePayload lose their field parameter, as its redundant and confusing.
• the UOE'd obselete lengthNorm is removed. I also updated javadocs that were pointing to it (this is bad!).