Package org.aksw.commons.collector.core

Class AggCounting<I,E>

java.lang.Object

org.aksw.commons.collector.core.AggCounting<I,E>

Type Parameters:

I - The input type

All Implemented Interfaces:

Serializable, Aggregator<I,E,Long>, ParallelAggregator<I,E,Long,Accumulator<I,E,Long>>

public class AggCounting<I,E>
extends Object
implements ParallelAggregator<I,E,Long,Accumulator<I,E,Long>>, Serializable

Aggregator whose accumulator count the number of seen input objects.

Author:

raven

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	AggCounting.AccCounting

Constructor Summary

Constructors

Constructor	Description
AggCounting()

Method Summary

Modifier and Type	Method	Description
Accumulator<I,E,Long>	combine(Accumulator<I,E,Long> a, Accumulator<I,E,Long> b)	Combine accumulators.
Accumulator<I,E,Long>	createAccumulator()
boolean	equals(Object other)
int	hashCode()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.aksw.commons.collector.domain.Aggregator

accumulateAll, accumulateAll, accumulateAll, finish

Methods inherited from interface org.aksw.commons.collector.domain.ParallelAggregator

asCollector, asCollector, combineRaw

Constructor Details

AggCounting

public AggCounting()

Method Details

createAccumulator

public Accumulator<I,E,Long> createAccumulator()

Specified by:

createAccumulator in interface Aggregator<I,E,Long>

Specified by:

createAccumulator in interface ParallelAggregator<I,E,Long,Accumulator<I,E,Long>>

combine

public Accumulator<I,E,Long> combine(Accumulator<I,E,Long> a,
 Accumulator<I,E,Long> b)

Description copied from interface: ParallelAggregator

Combine accumulators. This method is allowed to mutate any of if its arguments, hence accumulators should be considered exhausted after combination.

Specified by:

combine in interface ParallelAggregator<I,E,Long,Accumulator<I,E,Long>>

Parameters:

a - First participant of combination

b - Second participant of combination

Returns:

Combined accumulator

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object