DoFnReflector (Google Cloud Dataflow SDK 1.9.1 API)

Google Cloud Dataflow SDK for Java, version 1.9.1

Warning: Dataflow SDK 1.x for Java is unsupported as of October 16, 2018. After August 12, 2020, you can use unsupported SDKs temporarily while you upgrade your pipelines. For more information, see Using an unsupported SDK.

For information on migrating from the 1.x SDK, see Migrating from Dataflow SDK 1.x for Java.

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 DoFnReflector

• java.lang.Object
• • com.google.cloud.dataflow.sdk.transforms.DoFnReflector

• ---

  
  

  public abstract class DoFnReflector
  extends Object

  Utility implementing the necessary reflection for working with DoFnWithContexts.

• • Constructor Summary

    Constructors 

    Constructor and Description
    DoFnReflector()

  • Method Summary

    All Methods Static Methods Instance Methods Abstract Methods Concrete Methods 

    Modifier and Type	Method and Description
    static Class<?>	getDoFnClass(DoFn<?,?> fn)
    static DoFnReflector	of(Class<? extends DoFnWithContext> fn)
    <InputT,OutputT> DoFn<InputT,OutputT>	toDoFn(DoFnWithContext<InputT,OutputT> fn) Create a DoFn that the DoFnWithContext.
    abstract boolean	usesSingleWindow()

    • Methods inherited from class java.lang.Object

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

• • Constructor Detail

    • DoFnReflector

      public DoFnReflector()

  • Method Detail

    • usesSingleWindow

      public abstract boolean usesSingleWindow()

      Returns:

      true if the reflected DoFnWithContext uses a Single Window.

    • of

      public static DoFnReflector of(Class<? extends DoFnWithContext> fn)

      Returns:

      the DoFnReflector for the given DoFnWithContext.

    • toDoFn

      public <InputT,OutputT> DoFn<InputT,OutputT> toDoFn(DoFnWithContext<InputT,OutputT> fn)

      Create a DoFn that the DoFnWithContext.

    • getDoFnClass

      public static Class<?> getDoFnClass(DoFn<?,?> fn)