[jira] [Created] (LUCENE-6570) Make BooleanQuery immutable

["Adrien Grand (JIRA)" <ji...@apache.org>]

Adrien Grand created LUCENE-6570:
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             Summary: Make BooleanQuery immutable
                 Key: LUCENE-6570
                 URL: https://issues.apache.org/jira/browse/LUCENE-6570
             Project: Lucene - Core
          Issue Type: Task
            Reporter: Adrien Grand
            Assignee: Adrien Grand
            Priority: Minor


In the same spirit as LUCENE-6531 for the PhraseQuery, we should make BooleanQuery immutable.

The plan is the following:
 - create BooleanQuery.Builder with the same setters as BooleanQuery today (except setBoost) and a build() method that returns a BooleanQuery
 - remove setters from BooleanQuery (except setBoost)

I would also like to add some static utility methods for common use-cases of this query, for instance:
 - static BooleanQuery disjunction(Query... queries) to create a disjunction
 - static BooleanQuery conjunction(Query... queries) to create a conjunction
 - static BooleanQuery filtered(Query query, Query... filters) to create a filtered query

Hopefully this will help keep tests not too verbose, and the latter will also help with the FilteredQuery derecation/removal.



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