Module swim.streamlet

Package swim.streamlet.combinator

Class ReduceFieldsOperator<K,V,I,O>

java.lang.Object

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

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

All Implemented Interfaces:

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

Direct Known Subclasses:

ReduceFieldsCombinator

public abstract class ReduceFieldsOperator<K,V,I,O>
extends AbstractMapInletOutlet<K,V,I,O>

Field Summary

Fields

Modifier and Type	Field	Description
protected BTreeMap<K,V,O>	state

Fields inherited from class swim.streamlet.AbstractMapInletOutlet

effects, input, outputs, version

Constructor Summary

Constructors

Constructor	Description
ReduceFieldsOperator()

Method Summary

Modifier and Type	Method	Description
abstract O	accumulate(O result, V value)
abstract O	combine(O result, O value)
O	get()	Returns the current state of this Outlet.
abstract O	identity()
protected void	onReconcileOutputKey(K key, KeyEffect effect, int version)

Methods inherited from class swim.streamlet.AbstractMapInletOutlet

bindInput, bindInput, bindOutput, didInvalidate, didInvalidateOutputKey, didReconcile, didReconcileOutputKey, disconnectInputs, disconnectOutputs, input, invalidate, invalidateInput, invalidateOutput, invalidateOutputKey, onInvalidate, onInvalidateOutputKey, onReconcile, outputIterator, reconcile, reconcileInput, reconcileOutput, reconcileOutputKey, unbindInput, unbindOutput, unbindOutputs, willInvalidate, willInvalidateOutputKey, willReconcile, willReconcileOutputKey

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

state

protected BTreeMap<K,V,O> state

Constructor Detail

ReduceFieldsOperator

public ReduceFieldsOperator()

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>

Specified by:

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

onReconcileOutputKey

protected void onReconcileOutputKey(K key,
                                    KeyEffect effect,
                                    int version)

Overrides:

onReconcileOutputKey in class AbstractMapInletOutlet<K,V,I,O>

identity

public abstract O identity()

accumulate

public abstract O accumulate(O result,
                             V value)

combine

public abstract O combine(O result,
                          O value)