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

Packages that use Mapper

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.input
org.apache.hadoop.mapreduce.lib.map
org.apache.hadoop.mapreduce.lib.reduce
org.apache.hadoop.mapreduce.task

Uses of Mapper in org.apache.hadoop.mapreduce

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

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

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

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

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

protected static void	Chain.addMapper(boolean isMap, Job job, Class<? extends Mapper> klass, Class<?> inputKeyClass, Class<?> inputValueClass, Class<?> outputKeyClass, Class<?> outputValueClass, org.apache.hadoop.conf.Configuration mapperConf) Adds a Mapper class to the chain job.
static void	ChainMapper.addMapper(Job job, Class<? extends Mapper> klass, Class<?> inputKeyClass, Class<?> inputValueClass, Class<?> outputKeyClass, Class<?> outputValueClass, org.apache.hadoop.conf.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, org.apache.hadoop.conf.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

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.input

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

class

DelegatingMapper<K1,V1,K2,V2> An Mapper that delegates behavior of paths to multiple other mappers.

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

static void

MultipleInputs.addInputPath(Job job, org.apache.hadoop.fs.Path path, Class<? extends InputFormat> inputFormatClass, Class<? extends Mapper> mapperClass) Add a Path with a custom InputFormat and Mapper to the list of inputs for the map-reduce job.

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

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

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 WrappedMapper.Context implementations.

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

Class<? extends Mapper<?,?,?,?>>	WrappedMapper.Context.getMapperClass()
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

static <K1,V1,K2,V2> void

MultithreadedMapper.setMapperClass(Job job, Class<? extends Mapper<K1,V1,K2,V2>> cls) Set the application's mapper class.

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

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

Class<? extends Mapper<?,?,?,?>>

WrappedReducer.Context.getMapperClass()

Uses of Mapper in org.apache.hadoop.mapreduce.task

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

Class<? extends Mapper<?,?,?,?>>

JobContextImpl.getMapperClass() Get the Mapper class for the job.