Package org.apache.hadoop.mapred.lib.aggregate

Class ValueHistogram

java.lang.Object

org.apache.hadoop.mapreduce.lib.aggregate.ValueHistogram

org.apache.hadoop.mapred.lib.aggregate.ValueHistogram

All Implemented Interfaces:

ValueAggregator<String>, ValueAggregator<String>

@Public
@Stable
public class ValueHistogram
extends ValueHistogram
implements ValueAggregator<String>

This class implements a value aggregator that computes the histogram of a sequence of strings.

Constructor Summary

Constructors

Constructor	Description
ValueHistogram()

Method Summary

Methods inherited from class org.apache.hadoop.mapreduce.lib.aggregate.ValueHistogram

addNextValue, getCombinerOutput, getReport, getReportDetails, getReportItems, reset

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.mapreduce.lib.aggregate.ValueAggregator

addNextValue, getCombinerOutput, getReport, reset

Constructor Details

ValueHistogram

public ValueHistogram()