org.apache.mahout.cf.taste.hadoop.preparation
Class ToItemVectorsMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<VarLongWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>
      extended by org.apache.mahout.cf.taste.hadoop.preparation.ToItemVectorsMapper

public class ToItemVectorsMapper
extends org.apache.hadoop.mapreduce.Mapper<VarLongWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Field Summary
static String SAMPLE_SIZE
           
 
Constructor Summary
ToItemVectorsMapper()
           
 
Method Summary
protected  void map(VarLongWritable rowIndex, VectorWritable vectorWritable, org.apache.hadoop.mapreduce.Mapper.Context ctx)
           
protected  void setup(org.apache.hadoop.mapreduce.Mapper.Context ctx)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Mapper
cleanup, run
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

SAMPLE_SIZE

public static final String SAMPLE_SIZE
Constructor Detail

ToItemVectorsMapper

public ToItemVectorsMapper()
Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context ctx)
              throws IOException,
                     InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Mapper<VarLongWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>
Throws:
IOException
InterruptedException

map

protected void map(VarLongWritable rowIndex,
                   VectorWritable vectorWritable,
                   org.apache.hadoop.mapreduce.Mapper.Context ctx)
            throws IOException,
                   InterruptedException
Overrides:
map in class org.apache.hadoop.mapreduce.Mapper<VarLongWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>
Throws:
IOException
InterruptedException


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