Uses of Class
org.apache.hadoop.mapred.MapReduceBase

Packages that use MapReduceBase
org.apache.hadoop.examples Hadoop example code. 
org.apache.hadoop.examples.dancing This package is a distributed implementation of Knuth's dancing links algorithm that can run under Hadoop. 
org.apache.hadoop.hbase.mapred   
org.apache.hadoop.mapred.lib Library of generally useful mappers, reducers, and partitioners. 
org.apache.hadoop.tools   
 

Uses of MapReduceBase in org.apache.hadoop.examples
 

Subclasses of MapReduceBase in org.apache.hadoop.examples
static class PiEstimator.PiMapper
          Mappper class for Pi estimation.
static class PiEstimator.PiReducer
           
static class WordCount.MapClass
          Counts the words in each line.
static class WordCount.Reduce
          A reducer class that just emits the sum of the input values.
 

Uses of MapReduceBase in org.apache.hadoop.examples.dancing
 

Subclasses of MapReduceBase in org.apache.hadoop.examples.dancing
static class DistributedPentomino.PentMap
          Each map takes a line, which represents a prefix move and finds all of the solutions that start with that prefix.
 

Uses of MapReduceBase in org.apache.hadoop.hbase.mapred
 

Subclasses of MapReduceBase in org.apache.hadoop.hbase.mapred
 class GroupingTableMap
          Extract grouping columns from input record
 class IdentityTableMap
          Pass the given key and record as-is to reduce
 class IdentityTableReduce
          Write to table each key, record pair
 class IndexTableReduce
          Construct a Lucene document per row, which is consumed by IndexOutputFormat to build a Lucene index
 class TableMap
          Scan an HBase table to sort by a specified sort column.
 class TableReduce
          Write a table, sorting by the input key
 

Uses of MapReduceBase in org.apache.hadoop.mapred.lib
 

Subclasses of MapReduceBase in org.apache.hadoop.mapred.lib
 class IdentityMapper<K extends WritableComparable,V extends Writable>
          Implements the identity function, mapping inputs directly to outputs.
 class IdentityReducer<K extends WritableComparable,V extends Writable>
          Performs no reduction, writing all input values directly to the output.
 class InverseMapper<K extends WritableComparable,V extends WritableComparable>
          A Mapper that swaps keys and values.
 class LongSumReducer<K extends WritableComparable>
          A Reducer that sums long values.
 class RegexMapper<K extends WritableComparable>
          A Mapper that extracts text matching a regular expression.
 class TokenCountMapper<K extends WritableComparable>
          A Mapper that maps text values into pairs.
 

Uses of MapReduceBase in org.apache.hadoop.tools
 

Subclasses of MapReduceBase in org.apache.hadoop.tools
static class Logalyzer.LogRegexMapper<K extends WritableComparable>
          A Mapper that extracts text matching a regular expression.
 



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