Trejkaz created LUCENE-5186:
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Summary: Add CachingWrapperFilter.getFilter()
Key: LUCENE-5186
URL: https://issues.apache.org/jira/browse/LUCENE-5186
Project: Lucene - Core
Issue Type: Improvement
Components: core/search
Reporter: Trejkaz
Priority: Minor
There are a couple of use cases I can think of where being able to get the
underlying filter out of CachingWrapperFilter would be useful:
1. You might want to introspect the filter to figure out what's in it (the use
case we hit.)
2. You might want to serialise the filter since Lucene no longer supports that
itself.
We currently work around this by subclassing, keeping another copy of the
underlying filter reference and implementing a trivial getter, which is an easy
workaround, but the trap is that a junior developer could unknowingly create a
CachingWrapperFilter without knowing that the BetterCachingWrapperFilter
exists, introducing a filter which cannot be introspected.
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