de.hpi.fgis.voidgen.hadoop.tasks.ksimilarity
Class KSimStep1Mapper
java.lang.Object
org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,StringStringPair,StringStringPair>
de.hpi.fgis.voidgen.hadoop.tasks.ksimilarity.KSimStep1Mapper
public class KSimStep1Mapper
- extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,StringStringPair,StringStringPair>
Reads RDF quadruples and emits the pair of
predicate and object as key and the pair of
subject and context as value.
Input
- Key: ignored
- Value: textual form of an RDF quadruple
Output
- Key: the pair of
predicate and
object of the quadruple
- Value: the pair of
subject and
context of the quadruple
- Author:
- Eyk Kny, Hasso Plattner Institute at University of Potsdam, Germany, Johannes Gosda, Hasso Plattner Institute at University of Potsdam, Germany
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper |
org.apache.hadoop.mapreduce.Mapper.Context |
Method Summary |
protected void |
map(org.apache.hadoop.io.LongWritable key,
org.apache.hadoop.io.Text value,
org.apache.hadoop.mapreduce.Mapper.Context output)
|
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 |
KSimStep1Mapper
public KSimStep1Mapper()
map
protected void map(org.apache.hadoop.io.LongWritable key,
org.apache.hadoop.io.Text value,
org.apache.hadoop.mapreduce.Mapper.Context output)
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,StringStringPair,StringStringPair>
- Throws:
java.io.IOException
java.lang.InterruptedException