Class BestBucketsDeferringCollector
- java.lang.Object
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- org.elasticsearch.search.aggregations.BucketCollector
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- org.elasticsearch.search.aggregations.bucket.DeferringBucketCollector
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- org.elasticsearch.search.aggregations.bucket.BestBucketsDeferringCollector
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- All Implemented Interfaces:
org.apache.lucene.search.Collector
public class BestBucketsDeferringCollector extends DeferringBucketCollector
A specialization ofDeferringBucketCollector
that collects all matches and then is able to replay a given subset of buckets which represent the survivors from a pruning process performed by the aggregator that owns this collector.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.elasticsearch.search.aggregations.bucket.DeferringBucketCollector
DeferringBucketCollector.WrappedAggregator
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Field Summary
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Fields inherited from class org.elasticsearch.search.aggregations.BucketCollector
NO_OP_COLLECTOR
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Constructor Summary
Constructors Constructor Description BestBucketsDeferringCollector(SearchContext context, boolean isGlobal)
Sole constructor.
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Method Summary
Modifier and Type Method Description LeafBucketCollector
getLeafCollector(org.apache.lucene.index.LeafReaderContext ctx)
boolean
needsScores()
void
postCollection()
Post-collection callback.void
preCollection()
Pre collection callback.void
prepareSelectedBuckets(long... selectedBuckets)
Replay the wrapped collector, but only on a selection of buckets.void
setDeferredCollector(java.lang.Iterable<BucketCollector> deferredCollectors)
Set the deferred collectors.Aggregator
wrap(Aggregator in)
Wrap the provided aggregator so that it behaves (almost) as if it had been collected directly.-
Methods inherited from class org.elasticsearch.search.aggregations.bucket.DeferringBucketCollector
replay
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Constructor Detail
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BestBucketsDeferringCollector
public BestBucketsDeferringCollector(SearchContext context, boolean isGlobal)
Sole constructor.- Parameters:
context
- The search contextisGlobal
- Whether this collector visits all documents (global context)
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Method Detail
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needsScores
public boolean needsScores()
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setDeferredCollector
public void setDeferredCollector(java.lang.Iterable<BucketCollector> deferredCollectors)
Set the deferred collectors.- Specified by:
setDeferredCollector
in classDeferringBucketCollector
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getLeafCollector
public LeafBucketCollector getLeafCollector(org.apache.lucene.index.LeafReaderContext ctx) throws java.io.IOException
- Specified by:
getLeafCollector
in interfaceorg.apache.lucene.search.Collector
- Specified by:
getLeafCollector
in classBucketCollector
- Throws:
java.io.IOException
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preCollection
public void preCollection() throws java.io.IOException
Description copied from class:BucketCollector
Pre collection callback.- Specified by:
preCollection
in classBucketCollector
- Throws:
java.io.IOException
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postCollection
public void postCollection() throws java.io.IOException
Description copied from class:BucketCollector
Post-collection callback.- Specified by:
postCollection
in classBucketCollector
- Throws:
java.io.IOException
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prepareSelectedBuckets
public void prepareSelectedBuckets(long... selectedBuckets) throws java.io.IOException
Replay the wrapped collector, but only on a selection of buckets.- Specified by:
prepareSelectedBuckets
in classDeferringBucketCollector
- Throws:
java.io.IOException
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wrap
public Aggregator wrap(Aggregator in)
Wrap the provided aggregator so that it behaves (almost) as if it had been collected directly.- Overrides:
wrap
in classDeferringBucketCollector
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