Name | Description | Type | Package | Framework |
InverseMapper | A Mapper that swaps keys and values. | Class | org.apache.hadoop.mapreduce.lib.map | Apache Hadoop |
MultithreadedMapper | Multithreaded implementation for @link org. | Class | org.apache.hadoop.mapreduce.lib.map | Apache Hadoop |
RegexMapper | A Mapper that extracts text matching a regular expression. | Class | org.apache.hadoop.mapreduce.lib.map | Apache Hadoop |
TokenCounterMapper | Tokenize the input values and emit each word with a count of 1. | Class | org.apache.hadoop.mapreduce.lib.map | Apache Hadoop |
WrappedMapper | A Mapper which wraps a given one to allow custom Mapper. | Class | org.apache.hadoop.mapreduce.lib.map | Apache Hadoop |