de.hpi.fgis.voidgen.hadoop.tasks.joining
Class Join2Reducer

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by de.hpi.fgis.voidgen.hadoop.tasks.joining.Join2Reducer
All Implemented Interfaces:
java.io.Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Reducer<StringIntPair,RDFQuadruple,RDFQuadruple,org.apache.hadoop.io.NullWritable>

public class Join2Reducer
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Reducer<StringIntPair,RDFQuadruple,RDFQuadruple,org.apache.hadoop.io.NullWritable>

Applies the object cluster to each quadruple with the given object.

Input

Output

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
Join2Reducer()
           
 
Method Summary
 void reduce(StringIntPair key, java.util.Iterator<RDFQuadruple> values, org.apache.hadoop.mapred.OutputCollector<RDFQuadruple,org.apache.hadoop.io.NullWritable> output, org.apache.hadoop.mapred.Reporter reporter)
           
 
Methods inherited from class org.apache.hadoop.mapred.MapReduceBase
close, configure
 
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.mapred.JobConfigurable
configure
 
Methods inherited from interface java.io.Closeable
close
 

Constructor Detail

Join2Reducer

public Join2Reducer()
Method Detail

reduce

public void reduce(StringIntPair key,
                   java.util.Iterator<RDFQuadruple> values,
                   org.apache.hadoop.mapred.OutputCollector<RDFQuadruple,org.apache.hadoop.io.NullWritable> output,
                   org.apache.hadoop.mapred.Reporter reporter)
            throws java.io.IOException
Specified by:
reduce in interface org.apache.hadoop.mapred.Reducer<StringIntPair,RDFQuadruple,RDFQuadruple,org.apache.hadoop.io.NullWritable>
Throws:
java.io.IOException