org.apache.beam.runners.core.construction

Class EmptyFlattenAsCreateFactory<T>

java.lang.Object

org.apache.beam.runners.core.construction.EmptyFlattenAsCreateFactory<T>

All Implemented Interfaces:

PTransformOverrideFactory<PCollectionList<T>,PCollection<T>,Flatten.PCollections<T>>

public class EmptyFlattenAsCreateFactory<T>
extends Object
implements PTransformOverrideFactory<PCollectionList<T>,PCollection<T>,Flatten.PCollections<T>>

A PTransformOverrideFactory that provides an empty Create to replace a Flatten.PCollections that takes no input PCollections.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.beam.sdk.runners.PTransformOverrideFactory

PTransformOverrideFactory.PTransformReplacement<InputT extends PInput,OutputT extends POutput>, PTransformOverrideFactory.ReplacementOutput

Method Summary

Modifier and Type	Method and Description
PTransformOverrideFactory.PTransformReplacement<PCollectionList<T>,PCollection<T>>	getReplacementTransform(AppliedPTransform<PCollectionList<T>,PCollection<T>,Flatten.PCollections<T>> transform)
static <T> EmptyFlattenAsCreateFactory<T>	instance()
Map<PValue,PTransformOverrideFactory.ReplacementOutput>	mapOutputs(Map<TupleTag<?>,PValue> outputs, PCollection<T> newOutput)

Methods inherited from class java.lang.Object

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

Method Detail

instance

public static <T> EmptyFlattenAsCreateFactory<T> instance()

getReplacementTransform

public PTransformOverrideFactory.PTransformReplacement<PCollectionList<T>,PCollection<T>> getReplacementTransform(AppliedPTransform<PCollectionList<T>,PCollection<T>,Flatten.PCollections<T>> transform)

Specified by:

getReplacementTransform in interface PTransformOverrideFactory<PCollectionList<T>,PCollection<T>,Flatten.PCollections<T>>

mapOutputs

public Map<PValue,PTransformOverrideFactory.ReplacementOutput> mapOutputs(Map<TupleTag<?>,PValue> outputs,
                                                                          PCollection<T> newOutput)

Specified by:

mapOutputs in interface PTransformOverrideFactory<PCollectionList<T>,PCollection<T>,Flatten.PCollections<T>>