net.nutch.mapReduce
Class DefaultMapper
java.lang.Object
net.nutch.mapReduce.DefaultMapper
- All Implemented Interfaces:
- Mapper
- public class DefaultMapper
- extends Object
- implements Mapper
The default Mapper
. Implements the identity function, mapping
inputs directly to outputs.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
DefaultMapper
public DefaultMapper()
map
public void map(WritableComparable key,
Writable val,
OutputCollector results)
throws IOException
- The identify function. Input key/value pair is written directly to
output.
- Specified by:
map
in interface Mapper
- Parameters:
key
- the keyval
- the valuesresults
- collects mapped keys and values
- Throws:
IOException
Copyright © 2005 The Nutch Organization.