Highlighter should support all MultiFieldQuery subclasses without casts
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Key: LUCENE-2064
URL: https://issues.apache.org/jira/browse/LUCENE-2064
Project: Lucene - Java
Issue Type: Improvement
Components: contrib/highlighter
Affects Versions: 2.9.1
Reporter: Simon Willnauer
Assignee: Simon Willnauer
Fix For: 3.1
In order to support MultiTermQuery subclasses the Highlighter component applies
instanceof checks for concrete classes from the lucene core. This prevents
classes like RegexQuery in contrib from being supported. Introducing
dependencies on other contribs is not feasible just for being supported by the
highlighter.
While the instanceof checks and subsequent casts might hopefully go somehow
away in the future but for supporting more multterm queries I have a
alternative approach using a fake IndexReader that uses a RewriteMethod to
force the MTQ to pass the field name to the given reader without doing any real
work. It is easier to explain once you see the patch - I will upload shortly.
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