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From "Julian Reschke (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JCR-3611) Extend index configuration to support pluggable aggregation filters
Date Thu, 27 Jun 2013 13:24:20 GMT
Julian Reschke created JCR-3611:
-----------------------------------

             Summary: Extend index configuration to support pluggable aggregation filters
                 Key: JCR-3611
                 URL: https://issues.apache.org/jira/browse/JCR-3611
             Project: Jackrabbit Content Repository
          Issue Type: Improvement
          Components: query
            Reporter: Julian Reschke
            Priority: Minor


It can be useful to restrict the set of nodes to be aggregated in the search index based on
their current state.

It's currently possible to achieve this by wrapping Jackrabbit's IndexingConfigurationImpl
and AggregateRuleImpl, essentially post-processing/filtering the node states that the base
classes collect.

This works fine for now, but requires quite some glue code; we may want to make that simpler.

Thus, I'd like to extend the index aggregate configuration (see <http://wiki.apache.org/jackrabbit/IndexingConfiguration>)
so that one (or more) filter classes can be specified for each aggregate rule. Those filters
would implement a simple API:

public interface AggregationFilter {

     void init(QueryHandlerContext context, NamespaceMappings
namespaceMappings);

     /**
      * Check whether the given node should be aggregated under the
container node
      * @param ns node to be checked
      * @param container container node
      * @return whether to aggregate it
      */
     boolean canIncludeInResult(NodeState ns, NodeState container);
}

Jackrabbit's AggregateRuleImpl could then instantiate these filters and
apply them, and thus no additional glue code would be needed.


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