org.apache.flink.api.java.operators

Class CrossOperator.DefaultCross<I1,I2>

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.TwoInputOperator<IN1,IN2,OUT,O>

org.apache.flink.api.java.operators.TwoInputUdfOperator<I1,I2,OUT,CrossOperator<I1,I2,OUT>>

org.apache.flink.api.java.operators.CrossOperator<I1,I2,Tuple2<I1,I2>>

org.apache.flink.api.java.operators.CrossOperator.DefaultCross<I1,I2>

Type Parameters:

I1 - The type of the first input DataSet of the Cross transformation.

I2 - The type of the second input DataSet of the Cross transformation.

All Implemented Interfaces:

UdfOperator<CrossOperator<I1,I2,Tuple2<I1,I2>>>

Enclosing class:

CrossOperator<I1,I2,OUT>

@Public
public static final class CrossOperator.DefaultCross<I1,I2>
extends CrossOperator<I1,I2,Tuple2<I1,I2>>

A Cross transformation that wraps pairs of crossed elements into Tuple2.

It also represents the DataSet that is the result of a Cross transformation.

See Also:

Tuple2, DataSet

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.api.java.operators.CrossOperator

CrossOperator.CrossProjection<I1,I2>, CrossOperator.DefaultCross<I1,I2>, CrossOperator.ProjectCross<I1,I2,OUT extends Tuple>, CrossOperator.ProjectCrossFunction<T1,T2,R extends Tuple>

Field Summary

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

minResources, name, parallelism, preferredResources

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

context

Constructor Summary

Constructors

Constructor and Description
DefaultCross(DataSet<I1> input1, DataSet<I2> input2, CrossOperatorBase.CrossHint hint, String defaultName)

Method Summary

Modifier and Type	Method and Description
<OUT extends Tuple> CrossOperator.ProjectCross<I1,I2,OUT>	projectFirst(int... firstFieldIndexes) Initiates a ProjectCross transformation and projects the first cross input.
<OUT extends Tuple> CrossOperator.ProjectCross<I1,I2,OUT>	projectSecond(int... secondFieldIndexes) Initiates a ProjectCross transformation and projects the second cross input.
<R> CrossOperator<I1,I2,R>	with(CrossFunction<I1,I2,R> function) Finalizes a Cross transformation by applying a CrossFunction to each pair of crossed elements.

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

getCrossHint, getFunction, translateToDataFlow

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

extractSemanticAnnotationsFromUdf, getAnalyzedUdfSemanticsFlag, getBroadcastSets, getParameters, getSemanticProperties, returns, returns, returns, setAnalyzedUdfSemanticsFlag, setSemanticProperties, udfWithForwardedFieldsFirstAnnotation, udfWithForwardedFieldsSecondAnnotation, withBroadcastSet, withForwardedFieldsFirst, withForwardedFieldsSecond, withParameters

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

getInput1, getInput1Type, getInput2, getInput2Type

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

getMinResources, getName, getParallelism, getPreferredResources, 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

DefaultCross

public DefaultCross(DataSet<I1> input1,
                    DataSet<I2> input2,
                    CrossOperatorBase.CrossHint hint,
                    String defaultName)

Method Detail

with

public <R> CrossOperator<I1,I2,R> with(CrossFunction<I1,I2,R> function)

Finalizes a Cross transformation by applying a CrossFunction to each pair of crossed elements.

Each CrossFunction call returns exactly one element.

Parameters:

function - The CrossFunction that is called for each pair of crossed elements.

Returns:

An CrossOperator that represents the crossed result DataSet

See Also:

CrossFunction, DataSet

projectFirst

public <OUT extends Tuple> CrossOperator.ProjectCross<I1,I2,OUT> projectFirst(int... firstFieldIndexes)

Initiates a ProjectCross transformation and projects the first cross input.

If the first cross input is a Tuple DataSet, fields can be selected by their index. If the first cross input is not a Tuple DataSet, no parameters should be passed.

Fields of the first and second input can be added by chaining the method calls of CrossOperator.ProjectCross.projectFirst(int...) and CrossOperator.ProjectCross.projectSecond(int...).

Note: With the current implementation, the Project transformation loses type information.

Parameters:

firstFieldIndexes - If the first input is a Tuple DataSet, the indexes of the selected fields. For a non-Tuple DataSet, do not provide parameters. The order of fields in the output tuple is defined by to the order of field indexes.

Returns:

A ProjectCross which represents the projected cross result.

See Also:

Tuple, DataSet, CrossOperator.ProjectCross

projectSecond

public <OUT extends Tuple> CrossOperator.ProjectCross<I1,I2,OUT> projectSecond(int... secondFieldIndexes)

Initiates a ProjectCross transformation and projects the second cross input.

If the second cross input is a Tuple DataSet, fields can be selected by their index. If the second cross input is not a Tuple DataSet, no parameters should be passed.

Fields of the first and second input can be added by chaining the method calls of CrossOperator.ProjectCross.projectFirst(int...) and CrossOperator.ProjectCross.projectSecond(int...).

Note: With the current implementation, the Project transformation loses type information.

Parameters:

secondFieldIndexes - If the second input is a Tuple DataSet, the indexes of the selected fields. For a non-Tuple DataSet, do not provide parameters. The order of fields in the output tuple is defined by to the order of field indexes.

Returns:

A ProjectCross which represents the projected cross result.

See Also:

Tuple, DataSet, CrossOperator.ProjectCross