org.apache.flink.api.scala.operators

Class ScalaAggregateOperator<IN>

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<IN,IN,ScalaAggregateOperator<IN>>

org.apache.flink.api.scala.operators.ScalaAggregateOperator<IN>

Type Parameters:

IN - The type of the data set aggregated by the operator.

@Public
public class ScalaAggregateOperator<IN>
extends SingleInputOperator<IN,IN,ScalaAggregateOperator<IN>>

This operator represents the application of a "aggregate" operation 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	ScalaAggregateOperator.AggregatingUdf<T extends scala.Product>

Field Summary

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

name, parallelism

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

context

Constructor Summary

Constructors

Constructor and Description
ScalaAggregateOperator(DataSet<IN> input, Aggregations function, int field) Non grouped aggregation
ScalaAggregateOperator(Grouping<IN> input, Aggregations function, int field) Grouped aggregation

Method Summary

Methods

Modifier and Type	Method and Description
ScalaAggregateOperator<IN>	and(Aggregations function, int field)
protected GroupReduceOperatorBase<IN,IN,GroupReduceFunction<IN,IN>>	translateToDataFlow(Operator<IN> input)

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, clean, coGroup, collect, combineGroup, count, cross, crossWithHuge, crossWithTiny, distinct, distinct, distinct, distinct, fillInType, filter, first, flatMap, fullOuterJoin, fullOuterJoin, getExecutionEnvironment, getType, groupBy, groupBy, groupBy, iterate, iterateDelta, join, join, joinWithHuge, joinWithTiny, leftOuterJoin, leftOuterJoin, map, mapPartition, max, maxBy, min, minBy, output, partitionByHash, partitionByHash, partitionByHash, partitionByRange, partitionByRange, partitionByRange, partitionCustom, partitionCustom, partitionCustom, print, print, printOnTaskManager, printToErr, printToErr, project, rebalance, reduce, reduceGroup, rightOuterJoin, rightOuterJoin, runOperation, sortPartition, sortPartition, sortPartition, sum, union, write, write, writeAsCsv, writeAsCsv, writeAsCsv, writeAsCsv, writeAsFormattedText, writeAsFormattedText, writeAsText, writeAsText

Methods inherited from class java.lang.Object

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

Constructor Detail

ScalaAggregateOperator

public ScalaAggregateOperator(DataSet<IN> input,
                      Aggregations function,
                      int field)

Non grouped aggregation

ScalaAggregateOperator

public ScalaAggregateOperator(Grouping<IN> input,
                      Aggregations function,
                      int field)

Grouped aggregation

Parameters:

input -

function -

field -

Method Detail

and

public ScalaAggregateOperator<IN> and(Aggregations function,
                             int field)

translateToDataFlow

protected GroupReduceOperatorBase<IN,IN,GroupReduceFunction<IN,IN>> translateToDataFlow(Operator<IN> input)

Specified by:

translateToDataFlow in class SingleInputOperator<IN,IN,ScalaAggregateOperator<IN>>