ariba.util.core
Class Aggregator<W,V>

java.lang.Object
  ariba.util.core.Aggregator<W,V>

Direct Known Subclasses:

Aggregator.Collector

public abstract class Aggregator<W,V>
extends java.lang.Object

Nested Class Summary

static class

Aggregator.Collector<X>

Field Summary

static Aggregator<java.lang.Integer,java.lang.Object>	Count
static Aggregator<java.lang.Number,java.lang.Number>	Summer

Constructor Summary

Aggregator()

Method Summary

abstract W	aggregate(W aggregate, V value)
static <X> Aggregator.Collector<X>	collector()
boolean	mutatesAggregate()

Methods inherited from class java.lang.Object

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

Field Detail

Summer

public static final Aggregator<java.lang.Number,java.lang.Number> Summer

Count

public static final Aggregator<java.lang.Integer,java.lang.Object> Count

Constructor Detail

Aggregator

public Aggregator()

Method Detail

aggregate

public abstract W aggregate(W aggregate,
                            V value)

mutatesAggregate

public boolean mutatesAggregate()

collector

public static final <X> Aggregator.Collector<X> collector()