[jira] [Updated] (LUCENE-5186) Add CachingWrapperFilter.getFilter()

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[jira] [Updated] (LUCENE-5186) Add CachingWrapperFilter.getFilter()

Hudson (Jira)

     [ https://issues.apache.org/jira/browse/LUCENE-5186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Trejkaz updated LUCENE-5186:
----------------------------

    Attachment: LUCENE-5186.patch

Since it's pretty trivial. :)
               

> 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
>            Assignee: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-5186.patch
>
>
> 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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