com.asakusafw.runtime.io.util

Class ShuffleKey.AbstractGroupComparator

java.lang.Object

org.apache.hadoop.io.WritableComparator

com.asakusafw.runtime.io.util.ShuffleKey.AbstractGroupComparator

All Implemented Interfaces:

Comparator, org.apache.hadoop.conf.Configurable, org.apache.hadoop.io.RawComparator

Enclosing class:

ShuffleKey<TGroup extends WritableRawComparable,TOrder extends WritableRawComparable>

public abstract static class ShuffleKey.AbstractGroupComparator
extends org.apache.hadoop.io.WritableComparator

An abstract implementation of grouping comparator for ShuffleKey.

Since:

0.2.5

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractGroupComparator(Class<? extends ShuffleKey> keyClass) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
int	compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2)
int	compare(org.apache.hadoop.io.WritableComparable a, org.apache.hadoop.io.WritableComparable b)

Methods inherited from class org.apache.hadoop.io.WritableComparator

compare, compareBytes, define, get, get, getConf, getKeyClass, hashBytes, hashBytes, newKey, readDouble, readFloat, readInt, readLong, readUnsignedShort, readVInt, readVLong, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

AbstractGroupComparator

protected AbstractGroupComparator(Class<? extends ShuffleKey> keyClass)

Creates a new instance.

Parameters:

keyClass - the key class

Method Detail

compare

public int compare(org.apache.hadoop.io.WritableComparable a,
                   org.apache.hadoop.io.WritableComparable b)

Overrides:

compare in class org.apache.hadoop.io.WritableComparator

compare

public int compare(byte[] b1,
                   int s1,
                   int l1,
                   byte[] b2,
                   int s2,
                   int l2)

Specified by:

compare in interface org.apache.hadoop.io.RawComparator

Overrides:

compare in class org.apache.hadoop.io.WritableComparator