org.htuple
Class TupleComparator

java.lang.Object
  extended by org.apache.hadoop.io.WritableComparator
      extended by org.htuple.TupleComparator
All Implemented Interfaces:
Comparator, org.apache.hadoop.conf.Configurable, org.apache.hadoop.io.RawComparator
Direct Known Subclasses:
TupleGroupingComparator, TupleSortComparator

public abstract class TupleComparator
extends org.apache.hadoop.io.WritableComparator
implements org.apache.hadoop.conf.Configurable

A Comparator for Tuple instances, which can compare a subset of the elements in the tuple, which is useful for sorting and grouping when secondary-sort behavior is desired.

TODO - Optimize space+time by overriding the WritableComparator.compare(byte[], int, int, byte[], int, int).


Constructor Summary
TupleComparator()
           
 
Method Summary
 int compare(org.apache.hadoop.io.WritableComparable o1, org.apache.hadoop.io.WritableComparable o2)
           
 org.apache.hadoop.conf.Configuration getConf()
           
abstract  String getIndexConfigName()
           
 void setConf(org.apache.hadoop.conf.Configuration conf)
           
 
Methods inherited from class org.apache.hadoop.io.WritableComparator
compare, 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

TupleComparator

public TupleComparator()
Method Detail

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)
Specified by:
setConf in interface org.apache.hadoop.conf.Configurable

getIndexConfigName

public abstract String getIndexConfigName()

getConf

public org.apache.hadoop.conf.Configuration getConf()
Specified by:
getConf in interface org.apache.hadoop.conf.Configurable

compare

public int compare(org.apache.hadoop.io.WritableComparable o1,
                   org.apache.hadoop.io.WritableComparable o2)
Overrides:
compare in class org.apache.hadoop.io.WritableComparator


Copyright © 2013. All Rights Reserved.