[LUCENE-2854] Deprecate SimilarityDelegator and Similarity.lengthNorm

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.1, 4.0-ALPHA
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Michael McCandless
• Created: 07/Jan/11 19:11
• Updated: 28/Aug/22 12:39
• Resolved: 08/Jan/11 19:20

Description

SimilarityDelegator is a back compat trap (see LUCENE-2828).

Apps should just [statically] subclass Sim or DefaultSim; if they really need "runtime subclassing" then they can make their own app-level delegator.

Also, Sim.computeNorm subsumes lengthNorm, so we should deprecate lengthNorm in favor of computeNorm.