org.apache.giraph.aggregators.matrix.sparse

Class LongSparseVectorSumAggregator

java.lang.Object

org.apache.giraph.aggregators.BasicAggregator<LongSparseVector>

org.apache.giraph.aggregators.matrix.sparse.LongSparseVectorSumAggregator

All Implemented Interfaces:

Aggregator<LongSparseVector>

public class LongSparseVectorSumAggregator
extends BasicAggregator<LongSparseVector>

The long vector aggregator is used to aggregate long vectors.

Constructor Summary

Constructors

Constructor and Description
LongSparseVectorSumAggregator()

Method Summary

Modifier and Type	Method and Description
void	aggregate(LongSparseVector vector) Add a new value.
LongSparseVector	createInitialValue() Return new aggregated value which is neutral to aggregate operation.

Methods inherited from class org.apache.giraph.aggregators.BasicAggregator

getAggregatedValue, reset, setAggregatedValue

Methods inherited from class java.lang.Object

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

Constructor Detail

LongSparseVectorSumAggregator

public LongSparseVectorSumAggregator()

Method Detail

createInitialValue

public LongSparseVector createInitialValue()

Description copied from interface: Aggregator

Return new aggregated value which is neutral to aggregate operation. Must be changeable without affecting internals of Aggregator

Returns:

Neutral value

aggregate

public void aggregate(LongSparseVector vector)

Description copied from interface: Aggregator

Add a new value. Needs to be commutative and associative

Parameters:

vector - Value to be aggregated.