org.apache.mahout.fpm.pfpgrowth
Class ParallelFPGrowthMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,TransactionTree>
      extended by org.apache.mahout.fpm.pfpgrowth.ParallelFPGrowthMapper

public class ParallelFPGrowthMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,TransactionTree>

maps each transaction to all unique items groups in the transaction. mapper outputs the group id as key and the transaction as value


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Constructor Summary
ParallelFPGrowthMapper()
           
 
Method Summary
protected  void map(org.apache.hadoop.io.LongWritable offset, org.apache.hadoop.io.Text input, org.apache.hadoop.mapreduce.Mapper.Context context)
           
protected  void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
           
 
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
 

Constructor Detail

ParallelFPGrowthMapper

public ParallelFPGrowthMapper()
Method Detail

map

protected void map(org.apache.hadoop.io.LongWritable offset,
                   org.apache.hadoop.io.Text input,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException
Overrides:
map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,TransactionTree>
Throws:
IOException
InterruptedException

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
              throws IOException,
                     InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,TransactionTree>
Throws:
IOException
InterruptedException


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