de.hpi.fgis.voidgen.hadoop.tasks.joining
Class JoinGrouper

java.lang.Object
  extended by org.apache.hadoop.io.WritableComparator
      extended by de.hpi.fgis.voidgen.hadoop.tasks.joining.JoinGrouper
All Implemented Interfaces:
java.util.Comparator, org.apache.hadoop.io.RawComparator

public class JoinGrouper
extends org.apache.hadoop.io.WritableComparator

The grouping comparator for grouping pairs only depending on the left part of the pair.

Author:
Dandy Fenz, Hasso Plattner Institute at University of Potsdam, Germany, Matthias Pohl, Hasso Plattner Institute at University of Potsdam, Germany, Johannes Gosda, Hasso Plattner Institute at University of Potsdam, Germany

Constructor Summary
protected JoinGrouper()
           
 
Method Summary
 int compare(org.apache.hadoop.io.WritableComparable a, org.apache.hadoop.io.WritableComparable b)
           
 
Methods inherited from class org.apache.hadoop.io.WritableComparator
compare, compare, compareBytes, define, get, getKeyClass, 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

JoinGrouper

protected JoinGrouper()
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