Create.Values (Google Cloud Dataflow SDK 1.9.1 API)

Google Cloud Dataflow SDK for Java, version 1.9.1

Warning: Cloud Dataflow SDK 1.x for Java is unsupported as of October 16, 2018. See Migrating from Cloud Dataflow SDK 1.x for Java for migration guidance.

Note: If you are using Cloud Dataflow SDK version 2.x, see the Apache Beam API reference documentation.

com.google.cloud.dataflow.sdk.transforms

Class Create.Values<T>

• java.lang.Object
• • com.google.cloud.dataflow.sdk.transforms.PTransform<PInput,PCollection<T>>
  • • com.google.cloud.dataflow.sdk.transforms.Create.Values<T>

• All Implemented Interfaces:

  HasDisplayData, Serializable

  Direct Known Subclasses:

  Create.TimestampedValues

  Enclosing class:

  Create<T>

  ---

  
  

  public static class Create.Values<T>
  extends PTransform<PInput,PCollection<T>>

  A PTransform that creates a PCollection from a set of in-memory objects.

  See Also:

  Serialized Form

• • Field Summary

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

      name

  • Method Summary

    All Methods Instance Methods Concrete Methods 

    Modifier and Type	Method and Description
    PCollection<T>	apply(PInput input) Applies this PTransform on the given InputT, and returns its Output.
    Coder<T>	getDefaultOutputCoder(PInput input) Returns the default Coder to use for the output of this single-output PTransform when applied to the given input.
    Iterable<T>	getElements()
    Create.Values<T>	withCoder(Coder<T> coder) Returns a Create.Values PTransform like this one that uses the given Coder<T> to decode each of the objects into a value of type T.

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

      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

    • withCoder

      public Create.Values<T> withCoder(Coder<T> coder)

      Returns a Create.Values PTransform like this one that uses the given Coder<T> to decode each of the objects into a value of type T.

      By default, Create.Values can automatically determine the Coder to use if all elements have the same non-parameterized run-time class, and a default coder is registered for that class. See CoderRegistry for details on how defaults are determined.

      Note that for Create.Values with no elements, the VoidCoder is used.

    • getElements

      public Iterable<T> getElements()

    • apply

      public 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>>

    • getDefaultOutputCoder

      public Coder<T> getDefaultOutputCoder(PInput input)
                                     throws CannotProvideCoderException

      Description copied from class: PTransform
      Returns the default Coder to use for the output of this single-output PTransform when applied to the given input.

      By default, always throws.

      Overrides:

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

      Throws:

      CannotProvideCoderException - if none can be inferred.