com.google.cloud.dataflow.sdk.io

Class Read.Bounded<T>

java.lang.Object

com.google.cloud.dataflow.sdk.transforms.PTransform<PInput,PCollection<T>>

com.google.cloud.dataflow.sdk.io.Read.Bounded<T>

All Implemented Interfaces:

Serializable

Enclosing class:

Read

public static class Read.Bounded<T>
extends PTransform<PInput,PCollection<T>>

PTransform that reads from a BoundedSource.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.google.cloud.dataflow.sdk.transforms.PTransform

name

Method Summary

Modifier and Type	Method and Description
PCollection<T>	apply(PInput input) Applies this PTransform on the given InputT, and returns its Output.
protected Coder<T>	getDefaultOutputCoder() Returns the default Coder to use for the output of this single-output PTransform.
String	getKindString() Returns the name to use by default for this PTransform (not including the names of any enclosing PTransforms).
BoundedSource<T>	getSource() Returns the BoundedSource used to create this Read PTransform.
Read.Bounded<T>	named(String name) Returns a new Bounded PTransform that's like this one but has the given name.

Methods inherited from class com.google.cloud.dataflow.sdk.transforms.PTransform

getDefaultOutputCoder, getDefaultOutputCoder, getName, toString, validate

Methods inherited from class java.lang.Object

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

Method Detail

named

public Read.Bounded<T> named(String name)

Returns a new Bounded PTransform that's like this one but has the given name.

Does not modify this object.

getDefaultOutputCoder

protected Coder<T> getDefaultOutputCoder()

Description copied from class: PTransform

Returns the default Coder to use for the output of this single-output PTransform.

By default, always throws

Overrides:

getDefaultOutputCoder in class PTransform<PInput,PCollection<T>>

apply

public final PCollection<T> apply(PInput 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).

The default implementation throws an exception. A derived class must either implement apply, or else each runner must supply a custom implementation via PipelineRunner.apply(com.google.cloud.dataflow.sdk.transforms.PTransform<InputT, OutputT>, InputT).

Overrides:

apply in class PTransform<PInput,PCollection<T>>

getSource

public BoundedSource<T> getSource()

Returns the BoundedSource used to create this Read PTransform.

getKindString

public String getKindString()

Description copied from class: PTransform

Returns the name to use by default for this PTransform (not including the names of any enclosing PTransforms).

By default, returns the base name of this PTransform's class.

The caller is responsible for ensuring that names of applied PTransforms are unique, e.g., by adding a uniquifying suffix when needed.

Overrides:

getKindString in class PTransform<PInput,PCollection<T>>