Uses of Class
org.apache.hadoop.mapreduce.Mapper

Packages that use Mapper

Package	Description
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.lib.aggregate
org.apache.hadoop.mapreduce.lib.chain
org.apache.hadoop.mapreduce.lib.fieldsel
org.apache.hadoop.mapreduce.lib.map

Uses of Mapper in org.apache.hadoop.mapreduce

Methods in org.apache.hadoop.mapreduce that return types with arguments of type Mapper

Modifier and Type	Method	Description
Class<? extends Mapper<?,?,?,?>>	JobContext.getMapperClass()	Get the Mapper class for the job.

Method parameters in org.apache.hadoop.mapreduce with type arguments of type Mapper

Modifier and Type	Method	Description
void	Job.setMapperClass(Class<? extends Mapper> cls)	Set the Mapper for the job.

Uses of Mapper in org.apache.hadoop.mapreduce.lib.aggregate

Subclasses of Mapper in org.apache.hadoop.mapreduce.lib.aggregate

Modifier and Type	Class	Description
class	ValueAggregatorMapper<K1 extends WritableComparable<?>,V1 extends Writable>	This class implements the generic mapper of Aggregate.

Uses of Mapper in org.apache.hadoop.mapreduce.lib.chain

Subclasses of Mapper in org.apache.hadoop.mapreduce.lib.chain

Modifier and Type	Class	Description
class	ChainMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>	The ChainMapper class allows to use multiple Mapper classes within a single Map task.

Method parameters in org.apache.hadoop.mapreduce.lib.chain with type arguments of type Mapper

Modifier and Type	Method	Description
static void	ChainMapper.addMapper(Job job, Class<? extends Mapper> klass, Class<?> inputKeyClass, Class<?> inputValueClass, Class<?> outputKeyClass, Class<?> outputValueClass, Configuration mapperConf)	Adds a Mapper class to the chain mapper.
static void	ChainReducer.addMapper(Job job, Class<? extends Mapper> klass, Class<?> inputKeyClass, Class<?> inputValueClass, Class<?> outputKeyClass, Class<?> outputValueClass, Configuration mapperConf)	Adds a Mapper class to the chain reducer.

Uses of Mapper in org.apache.hadoop.mapreduce.lib.fieldsel

Subclasses of Mapper in org.apache.hadoop.mapreduce.lib.fieldsel

Modifier and Type	Class	Description
class	FieldSelectionMapper<K,V>	This class implements a mapper class that can be used to perform field selections in a manner similar to unix cut.

Uses of Mapper in org.apache.hadoop.mapreduce.lib.map

Subclasses of Mapper in org.apache.hadoop.mapreduce.lib.map

Modifier and Type	Class	Description
class	InverseMapper<K,V>	A Mapper that swaps keys and values.
class	MultithreadedMapper<K1,V1,K2,V2>	Multithreaded implementation for @link org.apache.hadoop.mapreduce.Mapper.
class	RegexMapper<K>	A Mapper that extracts text matching a regular expression.
class	TokenCounterMapper	Tokenize the input values and emit each word with a count of 1.
class	WrappedMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>	A Mapper which wraps a given one to allow custom Mapper.Context implementations.

Methods in org.apache.hadoop.mapreduce.lib.map that return types with arguments of type Mapper

Modifier and Type	Method	Description
static <K1, V1, K2, V2> Class<Mapper<K1,V1,K2,V2>>	MultithreadedMapper.getMapperClass(JobContext job)	Get the application's mapper class.

Method parameters in org.apache.hadoop.mapreduce.lib.map with type arguments of type Mapper

Modifier and Type	Method	Description
static <K1, V1, K2, V2> void	MultithreadedMapper.setMapperClass(Job job, Class<? extends Mapper<K1,V1,K2,V2>> cls)	Set the application's mapper class.