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https://issues.apache.org/jira/browse/JCR-3611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Reschke updated JCR-3611:
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Attachment: aggregate-filter-proposal.diff
Proposed change (WIP, no proper test case)
> 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
> Attachments: aggregate-filter-proposal.diff
>
>
> 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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