[LUCENE-8042] Add SegmentCachable interface

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.2
• Lucene Fields: New
• Assignee: Alan Woodward
• Reporter: Alan Woodward
• Created: 07/Nov/17 09:50
• Updated: 28/Aug/22 15:21
• Resolved: 10/Nov/17 17:36

Description

Following LUCENE-8017, I tried to add a getCacheHelper(LeafReaderContext) method to DoubleValuesSource so that Weights that use DVS can delegate on. This ended up with the same method being added to LongValuesSource, and some of the similar objects in spatial-extras. I think it makes sense to abstract this out into a separate SegmentCachable interface.