com.google.cloud.dataflow.sdk.io

Class ReadSource.Bound<T>

java.lang.Object

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

com.google.cloud.dataflow.sdk.io.ReadSource.Bound<T>

All Implemented Interfaces:

java.io.Serializable

Enclosing class:

ReadSource

public static class ReadSource.Bound<T>
extends PTransform<PInput,PCollection<T>>

Implementation of the ReadSource PTransform builder.

See Also:

Serialized Form

Field Summary

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

name

Method Summary

Methods

Modifier and Type	Method and Description
PCollection<T>	apply(PInput input) Applies this PTransform on the given Input, and returns its Output.
<T> ReadSource.Bound<T>	from(Source<T> source) Returns a new ReadSource PTransform that's like this one but reads from the given Source.
protected Coder<T>	getDefaultOutputCoder() Returns the default Coder to use for the output of this single-output PTransform, or null if none can be inferred.
Source<T>	getSource() Returns the Source used to create this ReadSource PTransform.
ReadSource.Bound<T>	named(java.lang.String name) Returns a new ReadSource PTransform that's like this one but has the given name.

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

finishSpecifying, getCoderRegistry, getDefaultName, getDefaultOutputCoder, getInput, getKindString, getName, getOutput, getPipeline, setName, setPipeline, toString, withName

Methods inherited from class java.lang.Object

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

Method Detail

from

public <T> ReadSource.Bound<T> from(Source<T> source)

Returns a new ReadSource PTransform that's like this one but reads from the given Source.

Does not modify this object.

named

public ReadSource.Bound<T> named(java.lang.String name)

Returns a new ReadSource 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, or null if none can be inferred.

By default, returns null.

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 Input, 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<Input, Output>, Input).

Overrides:

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

getSource

@Nullable
public Source<T> getSource()

Returns the Source used to create this ReadSource PTransform.