eu.stratosphere.arraymodel.functions

Class MapFunction

java.lang.Object

eu.stratosphere.api.common.functions.AbstractFunction

eu.stratosphere.arraymodel.functions.AbstractArrayModelFunction

eu.stratosphere.arraymodel.functions.MapFunction

All Implemented Interfaces:

Function, GenericMapper<Value[],Value[]>

Direct Known Subclasses:

WordCountArrayTuples.TokenizeLine

public abstract class MapFunction
extends AbstractArrayModelFunction
implements GenericMapper<Value[],Value[]>

Constructor Summary

Constructors

Constructor and Description
MapFunction()

Method Summary

Methods

Modifier and Type	Method and Description
Method	getUDFMethod()
abstract void	map(Value[] record, Collector<Value[]> out) This method must be implemented to provide a user implementation of a mapper.

Methods inherited from class eu.stratosphere.arraymodel.functions.AbstractArrayModelFunction

getDataTypes

Methods inherited from class eu.stratosphere.api.common.functions.AbstractFunction

close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface eu.stratosphere.api.common.functions.Function

close, getRuntimeContext, open, setRuntimeContext

Constructor Detail

MapFunction

public MapFunction()

Method Detail

map

public abstract void map(Value[] record,
       Collector<Value[]> out)
                  throws Exception

This method must be implemented to provide a user implementation of a mapper. It is called for each individual record.

Specified by:

map in interface GenericMapper<Value[],Value[]>

Parameters:

record - The record to be mapped.

out - A collector that collects all output records.

Throws:

Exception - Implementations may forward exceptions, which are caught by the runtime. When the runtime catches an exception, it aborts the map task and lets the fail-over logic decide whether to retry the mapper execution.

getUDFMethod

public Method getUDFMethod()

Specified by:

getUDFMethod in class AbstractArrayModelFunction