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https://issues.apache.org/jira/browse/LUCENE-4394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456367#comment-13456367
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Adrien Grand commented on LUCENE-4394:
--------------------------------------

Pulsing has a non-registered impl whose constructor forces to specify the 
delegate postings format and a registered Pulsing40PostingsFormat that 
delegates to Lucene40PostingsFormat.

So we could unregister BloomFilterPostingsFormat, remove its default 
constructor and have a BloomFilter40PostingsFormat subclass that would delegate 
to Lucene40PostingsFormat?
                
> Make BloomFilteringPostingsFormat wrap Lucene40PostingsFormat by default
> ------------------------------------------------------------------------
>
>                 Key: LUCENE-4394
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4394
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Adrien Grand
>            Priority: Trivial
>
> When loading BloomFilteringPostingsFormat from the SPI registry, it will have 
> a null delegate by default. I think it would be more comfortable to make it 
> wrap Lucene40PostingsFormat by default so that it can be used against 
> lucene-core tests (ant -Dtests.postingsFormat=BloomFilter, currently fails 
> with "java.lang.UnsupportedOperationException: Error - 
> org.apache.lucene.codecs.bloom.BloomFilteringPostingsFormat has been 
> constructed without a choice of PostingsFormat") or with Solr field types 
> with minimal configuration (<fieldType ... postingsFormat="BloomFilter" />).

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