eu.stratosphere.arraymodel.operators

Class ReduceWithKeyOperator

java.lang.Object

eu.stratosphere.api.common.operators.Operator

eu.stratosphere.api.common.operators.AbstractUdfOperator<T>

eu.stratosphere.api.common.operators.SingleInputOperator<T>

eu.stratosphere.api.common.operators.base.ReduceOperatorBase<ReduceWithKeyFunction>

eu.stratosphere.arraymodel.operators.ReduceWithKeyOperator

All Implemented Interfaces:

Visitable<Operator>

public class ReduceWithKeyOperator
extends ReduceOperatorBase<ReduceWithKeyFunction>

MapOperator represents a Pact with a Map Input Contract. InputContracts are second-order functions. They have one or multiple input sets of records and a first-order user function (stub implementation).

Map works on a single input and calls the first-order user function of a eu.stratosphere.pact.common.stub.MapStub for each record independently.

See Also:

ReduceFunction

Nested Class Summary

Nested classes/interfaces inherited from class eu.stratosphere.api.common.operators.base.ReduceOperatorBase

ReduceOperatorBase.Combinable

Field Summary

Fields inherited from class eu.stratosphere.api.common.operators.SingleInputOperator

input

Fields inherited from class eu.stratosphere.api.common.operators.AbstractUdfOperator

stub

Fields inherited from class eu.stratosphere.api.common.operators.Operator

compilerHints, name, ocs, parameters

Constructor Summary

Constructors

Constructor and Description
ReduceWithKeyOperator(Class<? extends ReduceWithKeyFunction> udf, int keyPosition, String name)
ReduceWithKeyOperator(ReduceWithKeyFunction udf, int keyPosition, String name)

Method Summary

Methods inherited from class eu.stratosphere.api.common.operators.base.ReduceOperatorBase

isCombinable

Methods inherited from class eu.stratosphere.api.common.operators.SingleInputOperator

accept, addInput, addInputs, clearInputs, getInputs, getKeyColumns, getNumberOfInputs, setInput, setInputs

Methods inherited from class eu.stratosphere.api.common.operators.AbstractUdfOperator

asArray, emptyClassArray, getUserCodeWrapper

Methods inherited from class eu.stratosphere.api.common.operators.Operator

getCompilerHints, getDegreeOfParallelism, getName, getParameters, getUserCodeAnnotation, setDegreeOfParallelism, setName, setParameter, setParameter, setParameter, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ReduceWithKeyOperator

public ReduceWithKeyOperator(Class<? extends ReduceWithKeyFunction> udf,
                     int keyPosition,
                     String name)

ReduceWithKeyOperator

public ReduceWithKeyOperator(ReduceWithKeyFunction udf,
                     int keyPosition,
                     String name)