org.apache.beam.runners.dataflow

Class CreateDataflowView<ElemT,ViewT>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<ElemT>,PCollectionView<ViewT>>

org.apache.beam.runners.dataflow.CreateDataflowView<ElemT,ViewT>

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

public class CreateDataflowView<ElemT,ViewT>
extends PTransform<PCollection<ElemT>,PCollectionView<ViewT>>

A DataflowRunner marker class for creating a PCollectionView.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

name

Method Summary

Modifier and Type	Method and Description
PCollectionView<ViewT>	expand(PCollection<ElemT> input) Applies this PTransform on the given InputT, and returns its Output.
PCollectionView<ViewT>	getView()
static <ElemT,ViewT> CreateDataflowView<ElemT,ViewT>	of(PCollectionView<ViewT> view)

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, populateDisplayData, toString, validate

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <ElemT,ViewT> CreateDataflowView<ElemT,ViewT> of(PCollectionView<ViewT> view)

expand

public PCollectionView<ViewT> expand(PCollection<ElemT> input)

Description copied from class: PTransform

Applies this PTransform on the given InputT, and returns its Output.

Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).

Specified by:

expand in class PTransform<PCollection<ElemT>,PCollectionView<ViewT>>

getView

public PCollectionView<ViewT> getView()