Shai Erera created LUCENE-4750:
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Summary: Convert DrillDown to DrillDownQuery
Key: LUCENE-4750
URL: https://issues.apache.org/jira/browse/LUCENE-4750
Project: Lucene - Core
Issue Type: Improvement
Components: modules/facet
Reporter: Shai Erera
DrillDown is a utility class for creating drill-down queries over a base query
and a bunch of categories. We've been asked to support AND, OR and AND of ORs.
The latter is not so simple as a static utility method though, so instead we
have some sample code ...
Rather, I think that we can just create a DrillDownQuery (extends Query) which
takes a baseQuery in its ctor and exposes add(CategoryPath...), such that every
such group of categories is AND'ed with other groups, and internally they are
OR'ed. It's very similar to how you would construct a BooleanQuery, only
simpler and specific to facets.
Internally, it would build a BooleanQuery and delegate rewrite, createWeight
etc to it.
That will remove the need for the static utility methods .. or we can keep
static term() for convenience.
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