edu.umd.cloud9.mapred
Class NullMapper

java.lang.Object
  org.apache.hadoop.mapred.MapReduceBase
      edu.umd.cloud9.mapred.NullMapper

All Implemented Interfaces:

Closeable, JobConfigurable, Mapper<NullWritable,NullWritable,NullWritable,NullWritable>

public abstract class NullMapper
extends MapReduceBase
implements Mapper<NullWritable,NullWritable,NullWritable,NullWritable>

Constructor Summary

NullMapper()

Method Summary

void	configure(JobConf conf)
void	map(NullWritable key, NullWritable value, OutputCollector<NullWritable,NullWritable> output, Reporter reporter)
abstract void	run(JobConf conf, Reporter reporter)

Methods inherited from class org.apache.hadoop.mapred.MapReduceBase

close

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.io.Closeable

close

Constructor Detail

NullMapper

public NullMapper()

Method Detail

configure

public void configure(JobConf conf)

Specified by:

configure in interface JobConfigurable

Overrides:

configure in class MapReduceBase

map

public void map(NullWritable key,
                NullWritable value,
                OutputCollector<NullWritable,NullWritable> output,
                Reporter reporter)
         throws IOException

Specified by:

map in interface Mapper<NullWritable,NullWritable,NullWritable,NullWritable>

Throws:

IOException

run

public abstract void run(JobConf conf,
                         Reporter reporter)
                  throws IOException

Throws:

IOException