Package | Description |
---|---|
org.apache.hadoop.mapred.lib |
Modifier and Type | Class and Description |
---|---|
class |
IdentityMapper<K,V>
Implements the identity function, mapping inputs directly to outputs.
|
class |
IdentityReducer<K,V>
Performs no reduction, writing all input values directly to the output.
|
class |
InverseMapper<K,V>
A
Mapper that swaps keys and values. |
class |
LongSumReducer<K>
A
Reducer that sums long values. |
class |
RegexMapper<K>
A
Mapper that extracts text matching a regular expression. |
class |
TokenCountMapper<K>
A
Mapper that maps text values into <token,freq> pairs. |
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