org.apache.beam.sdk.util.construction

Class PTransformTranslation.RawPTransform<InputT extends PInput,OutputT extends POutput>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<InputT,OutputT>

org.apache.beam.sdk.util.construction.PTransformTranslation.RawPTransform<InputT,OutputT>

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

PTransformTranslation

public abstract static class PTransformTranslation.RawPTransform<InputT extends PInput,OutputT extends POutput>
extends PTransform<InputT,OutputT>

A PTransform that indicates its URN and payload directly.

This is the result of rehydrating transforms from a pipeline proto. There is no expand(InputT) method since the definition of the transform may be lost. The transform is already fully expanded in the pipeline proto.

See Also:

Serialized Form

Field Summary

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

annotations, displayData, name, resourceHints

Constructor Summary

Constructors

Constructor and Description
RawPTransform()

Method Summary

Modifier and Type	Method and Description
OutputT	expand(InputT input) By default, throws an exception, but can be overridden.
abstract @Nullable org.apache.beam.model.pipeline.v1.RunnerApi.FunctionSpec	getSpec() The payload for this transform, if any.
@Nullable java.lang.String	getUrn() The URN for this transform, if standardized.
org.apache.beam.model.pipeline.v1.RunnerApi.FunctionSpec	migrate(SdkComponents components) Build a new payload set in the context of the given SdkComponents, if applicable.

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

addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

RawPTransform

public RawPTransform()

Method Detail

getUrn

public @Nullable java.lang.String getUrn()

The URN for this transform, if standardized.

getSpec

public abstract @Nullable org.apache.beam.model.pipeline.v1.RunnerApi.FunctionSpec getSpec()

The payload for this transform, if any.

migrate

public org.apache.beam.model.pipeline.v1.RunnerApi.FunctionSpec migrate(SdkComponents components)
                                                                 throws java.io.IOException

Build a new payload set in the context of the given SdkComponents, if applicable.

When re-serializing this transform, the ids reference in the rehydrated payload may conflict with those defined by the serialization context. In that case, the components must be re-registered and a new payload returned.

Throws:

java.io.IOException

expand

public OutputT expand(InputT input)

By default, throws an exception, but can be overridden.

It is permissible for runner-specific transforms to be both a PTransformTranslation.RawPTransform that directly vends its proto representation and also to expand, for convenience of not having to register a translator.

Specified by:

expand in class PTransform<InputT extends PInput,OutputT extends POutput>