[LUCENE-6952] All Filter* delegating classes should be abstract

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 6.0
• Lucene Fields: New
• Assignee: David Smiley
• Reporter: David Smiley
• Created: 29/Dec/15 06:12
• Updated: 28/Aug/22 14:47
• Resolved: 08/Mar/16 17:39

Description

I think it's confusing that FilterLeafReader (and it's Filter* inner classes) are not abstract. By making them abstract, we clarify to users how to use them by virtue of them being abstract. It seems only a couple tests directly instantiate them. This applies to other Filter* classes as well.