de.hpi.fgis.voidgen.hadoop.tasks.distinctclustering
Class TypeStatisticsMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,StringIntPair,StringIntPair>
      extended by de.hpi.fgis.voidgen.hadoop.tasks.distinctclustering.TypeStatisticsMapper

public class TypeStatisticsMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,StringIntPair,StringIntPair>

Reads RDF quadruples and outputs for each quadruple where the predicate is rdf:type the subjects of this type and an integer for counting the appearances of the predicate.

Input

Output

Author:
Martin Linkhorst, Hasso Plattner Institute at University of Potsdam, Germany, Johannes Gosda, Hasso Plattner Institute at University of Potsdam, Germany

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Constructor Summary
TypeStatisticsMapper()
           
 
Method Summary
 void map(org.apache.hadoop.io.LongWritable key, org.apache.hadoop.io.Text value, org.apache.hadoop.mapreduce.Mapper.Context context)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Mapper
cleanup, run, setup
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

TypeStatisticsMapper

public TypeStatisticsMapper()
Method Detail

map

public void map(org.apache.hadoop.io.LongWritable key,
                org.apache.hadoop.io.Text value,
                org.apache.hadoop.mapreduce.Mapper.Context context)
         throws java.io.IOException,
                java.lang.InterruptedException
Overrides:
map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,StringIntPair,StringIntPair>
Throws:
java.io.IOException
java.lang.InterruptedException