org.apache.flink.api.java.operators

Class DistinctOperator<T>

java.lang.Object

org.apache.flink.api.java.DataSet<OUT>

org.apache.flink.api.java.operators.Operator<OUT,O>

org.apache.flink.api.java.operators.SingleInputOperator<T,T,DistinctOperator<T>>

org.apache.flink.api.java.operators.DistinctOperator<T>

Type Parameters:

T - The type of the data set made distinct by the operator.

public class DistinctOperator<T>
extends SingleInputOperator<T,T,DistinctOperator<T>>

This operator represents the application of a "distinct" function on a data set, and the result data set produced by the function.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DistinctOperator.DistinctFunction<T>

Constructor Summary

Constructors

Constructor and Description
DistinctOperator(DataSet<T> input, Keys<T> keys)

Method Summary

Methods

Modifier and Type	Method and Description
protected GroupReduceOperatorBase<?,T,?>	translateToDataFlow(Operator<T> input) Translates this operation to a data flow operator of the common data flow API.

Methods inherited from class org.apache.flink.api.java.operators.SingleInputOperator

getInput, getInputType

Methods inherited from class org.apache.flink.api.java.operators.Operator

getName, getParallelism, getResultType, name, setParallelism

Methods inherited from class org.apache.flink.api.java.DataSet

aggregate, checkSameExecutionContext, coGroup, cross, crossWithHuge, crossWithTiny, distinct, distinct, distinct, filter, flatMap, getExecutionEnvironment, getType, groupBy, groupBy, iterate, iterateDelta, join, joinWithHuge, joinWithTiny, map, max, min, output, print, printToErr, project, reduce, reduceGroup, runOperation, sum, union, write, write, writeAsCsv, writeAsCsv, writeAsCsv, writeAsText, writeAsText

Methods inherited from class java.lang.Object

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

Constructor Detail

DistinctOperator

public DistinctOperator(DataSet<T> input,
                Keys<T> keys)

Method Detail

translateToDataFlow

protected GroupReduceOperatorBase<?,T,?> translateToDataFlow(Operator<T> input)

Description copied from class: SingleInputOperator

Translates this operation to a data flow operator of the common data flow API.

Specified by:

translateToDataFlow in class SingleInputOperator<T,T,DistinctOperator<T>>

Parameters:

input - The data flow operator that produces this operation's input data.

Returns:

The translated data flow operator.