Package org.roaringbitmap.buffer
Class BufferParallelAggregation.ContainerCollector
java.lang.Object
org.roaringbitmap.buffer.BufferParallelAggregation.ContainerCollector
- All Implemented Interfaces:
Collector<Map.Entry<Character,
List<MappeableContainer>>, MutableRoaringArray, MutableRoaringBitmap>
- Enclosing class:
BufferParallelAggregation
public static class BufferParallelAggregation.ContainerCollector
extends Object
implements Collector<Map.Entry<Character,List<MappeableContainer>>,MutableRoaringArray,MutableRoaringBitmap>
Collects containers grouped by their key into a RoaringBitmap, applying the
supplied aggregation function to each group.
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Nested Class Summary
Nested classes/interfaces inherited from interface java.util.stream.Collector
Collector.Characteristics
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final Function
<List<MappeableContainer>, MappeableContainer> -
Constructor Summary
ConstructorsConstructorDescriptionCreates a collector with the reducer function. -
Method Summary
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Field Details
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reducer
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Constructor Details
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ContainerCollector
ContainerCollector(Function<List<MappeableContainer>, MappeableContainer> reducer) Creates a collector with the reducer function.- Parameters:
reducer
- a function to apply to containers with the same key.
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Method Details
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supplier
- Specified by:
supplier
in interfaceCollector<Map.Entry<Character,
List<MappeableContainer>>, MutableRoaringArray, MutableRoaringBitmap>
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accumulator
- Specified by:
accumulator
in interfaceCollector<Map.Entry<Character,
List<MappeableContainer>>, MutableRoaringArray, MutableRoaringBitmap>
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combiner
- Specified by:
combiner
in interfaceCollector<Map.Entry<Character,
List<MappeableContainer>>, MutableRoaringArray, MutableRoaringBitmap>
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finisher
- Specified by:
finisher
in interfaceCollector<Map.Entry<Character,
List<MappeableContainer>>, MutableRoaringArray, MutableRoaringBitmap>
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characteristics
- Specified by:
characteristics
in interfaceCollector<Map.Entry<Character,
List<MappeableContainer>>, MutableRoaringArray, MutableRoaringBitmap>
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