Joel Bernstein created SOLR-5020:
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Summary: Add final() method to DelegatingCollector
Key: SOLR-5020
URL: https://issues.apache.org/jira/browse/SOLR-5020
Project: Solr
Issue Type: New Feature
Components: search
Affects Versions: 5.0
Reporter: Joel Bernstein
Priority: Minor
Fix For: 5.0
This issue adds a final() method to the DelegatingCollector class so that it
can be notified when collection is complete.
The current collect() method assumes that the delegating collector will either
forward on the document or not with each call. The final() method will allow
DelegatingCollectors to have more sophisticated behavior.
For example a Field Collapsing delegating collector could collapse the
documents as the collect() method is being called. Then when the final() method
is called it could pass the collapsed documents to the delegate collectors.
This would allow grouping to be implemented within the PostFilter framework.
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