Module swim.streamlet

Package swim.streamlet.combinator

Class ReduceFieldsCombinator<K,V,I,O>

java.lang.Object

swim.streamlet.AbstractMapInletOutlet<K,V,I,O>

swim.streamlet.combinator.ReduceFieldsOperator<K,V,I,O>

swim.streamlet.combinator.ReduceFieldsCombinator<K,V,I,O>

All Implemented Interfaces:

Inlet<I>, MapInlet<K,V,I>, MapInletOutlet<K,V,I,O>, Outlet<O>

public class ReduceFieldsCombinator<K,V,I,O>
extends ReduceFieldsOperator<K,V,I,O>

Field Summary

Fields

Modifier and Type	Field	Description
protected swim.util.CombinerFunction<? super V,O>	accumulator
protected swim.util.CombinerFunction<O,O>	combiner
protected O	identity

Fields inherited from class swim.streamlet.combinator.ReduceFieldsOperator

state

Fields inherited from class swim.streamlet.AbstractMapInletOutlet

effects, input, outputs, version

Constructor Summary

Constructors

Constructor	Description
ReduceFieldsCombinator(O identity, swim.util.CombinerFunction<? super V,O> accumulator, swim.util.CombinerFunction<O,O> combiner)

Method Summary

Modifier and Type	Method	Description
O	accumulate(O result, V value)
O	combine(O result, O value)
O	get()	Returns the current state of this Outlet.
O	identity()

Methods inherited from class swim.streamlet.combinator.ReduceFieldsOperator

onRecohereOutputKey

Methods inherited from class swim.streamlet.AbstractMapInletOutlet

bindInput, bindInput, bindOutput, decohere, decohereInput, decohereOutput, decohereOutputKey, didDecohere, didDecohereOutputKey, didRecohere, didRecohereOutputKey, disconnectInputs, disconnectOutputs, input, onDecohere, onDecohereOutputKey, onRecohere, outputIterator, recohere, recohereInput, recohereOutput, recohereOutputKey, unbindInput, unbindOutput, unbindOutputs, willDecohere, willDecohereOutputKey, willRecohere, willRecohereOutputKey

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface swim.streamlet.Outlet

map, memoize, watch

Field Detail

identity

protected final O identity

accumulator

protected final swim.util.CombinerFunction<? super V,O> accumulator

combiner

protected final swim.util.CombinerFunction<O,O> combiner

Constructor Detail

ReduceFieldsCombinator

public ReduceFieldsCombinator(O identity,
                              swim.util.CombinerFunction<? super V,O> accumulator,
                              swim.util.CombinerFunction<O,O> combiner)

Method Detail

get

public O get()

Description copied from interface: Outlet

Returns the current state of this Outlet.

Specified by:

get in interface Outlet<K>

Overrides:

get in class ReduceFieldsOperator<K,V,I,O>

identity

public O identity()

Specified by:

identity in class ReduceFieldsOperator<K,V,I,O>

accumulate

public O accumulate(O result,
                    V value)

Specified by:

accumulate in class ReduceFieldsOperator<K,V,I,O>

combine

public O combine(O result,
                 O value)

Specified by:

combine in class ReduceFieldsOperator<K,V,I,O>