org.apache.mahout.math.stats.entropy
Class ValueCounterMapper
java.lang.Object
org.apache.hadoop.mapreduce.Mapper<Object,org.apache.hadoop.io.Writable,org.apache.hadoop.io.Writable,VarIntWritable>
org.apache.mahout.math.stats.entropy.ValueCounterMapper
public final class ValueCounterMapper
- extends org.apache.hadoop.mapreduce.Mapper<Object,org.apache.hadoop.io.Writable,org.apache.hadoop.io.Writable,VarIntWritable>
Emits the value and the count of 1 as VarIntWritable
.
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper |
org.apache.hadoop.mapreduce.Mapper.Context |
Method Summary |
void |
map(Object key,
org.apache.hadoop.io.Writable value,
org.apache.hadoop.mapreduce.Mapper.Context context)
|
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 |
ValueCounterMapper
public ValueCounterMapper()
map
public void map(Object key,
org.apache.hadoop.io.Writable value,
org.apache.hadoop.mapreduce.Mapper.Context context)
throws IOException,
InterruptedException
- Overrides:
map
in class org.apache.hadoop.mapreduce.Mapper<Object,org.apache.hadoop.io.Writable,org.apache.hadoop.io.Writable,VarIntWritable>
- Throws:
IOException
InterruptedException
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