org.apache.pig.backend.hadoop.executionengine.mapReduceLayer
Class PigTupleDefaultRawComparator

java.lang.Object
  org.apache.hadoop.io.WritableComparator
      org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigTupleDefaultRawComparator

All Implemented Interfaces:

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

public class PigTupleDefaultRawComparator
extends org.apache.hadoop.io.WritableComparator
implements TupleRawComparator

Constructor Summary

PigTupleDefaultRawComparator()

Method Summary

int	compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) Compare two NullableTuples as raw bytes.
int	compare(Object o1, Object o2)
org.apache.hadoop.conf.Configuration	getConf()
boolean	hasComparedTupleNull() Checks if one of the compared tuples had a null field.
void	setConf(org.apache.hadoop.conf.Configuration conf)

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

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

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

equals

Constructor Detail

PigTupleDefaultRawComparator

public PigTupleDefaultRawComparator()

Method Detail

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

getConf

public org.apache.hadoop.conf.Configuration getConf()

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable

hasComparedTupleNull

public boolean hasComparedTupleNull()

Description copied from interface: TupleRawComparator

Checks if one of the compared tuples had a null field. This method is meaningful only when RawComparator.compare(byte[],int,int,byte[],int,int) has returned a zero value (i.e. tuples are determined to be equal).

Specified by:

hasComparedTupleNull in interface TupleRawComparator

Returns:

true if one of the compared tuples had a null field, false otherwise.

compare

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

Compare two NullableTuples as raw bytes. If neither are null, then IntWritable.compare() is used. If both are null then the indices are compared. Otherwise the null one is defined to be less.

Specified by:

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

Overrides:

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

compare

public int compare(Object o1,
                   Object o2)

Specified by:

compare in interface Comparator

Overrides:

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