[LUCENE-3735] Fix PayloadProcessorProvider to no longer use Directory for lookup, instead AtomicReader

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.6, 4.0-ALPHA
• Component/s: core/index
• Lucene Fields: New
• Assignee: Uwe Schindler
• Reporter: Uwe Schindler
• Created: 31/Jan/12 14:18
• Updated: 28/Aug/22 16:06
• Resolved: 01/Feb/12 15:37

Description

The PayloadProcessorProvider has a broken API, this should be fixed. The current trunk mimics the old behaviour, but not 100%.

The PayloadProcessorProvider API should return a PayloadProcessor based on the AtomicReader instance that gets merged. As AtomicReader do no longer know the directory they are reside (they could be e.g. FilterIndexReaders, MemoryIndexes,...) a selection by Directory is no longer possible.

The current code in Lucene trunk mimics the old behavior by doing an instanceof SegmentReader check and then asking for a DirProvider. If something else is merged in, Payload processing is not supported. This should be changed, the old API could be kept backwards compatible by moving the instanceof check in a "convenience class" DirPayloadProcessorProvider, extending PayloadProcessorProvider.