org.apache.beam.sdk.transforms

Class SimpleFunction<InputT,OutputT>

java.lang.Object

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

All Implemented Interfaces:

Serializable, SerializableFunction<InputT,OutputT>

public abstract class SimpleFunction<InputT,OutputT>
extends Object
implements SerializableFunction<InputT,OutputT>

A SerializableFunction which is not a functional interface. Concrete subclasses allow us to infer type information, which in turn aids Coder inference.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SimpleFunction()

Method Summary

Modifier and Type	Method and Description
TypeDescriptor<InputT>	getInputTypeDescriptor() Returns a TypeDescriptor capturing what is known statically about the input type of this DoFn instance's most-derived class.
TypeDescriptor<OutputT>	getOutputTypeDescriptor() Returns a TypeDescriptor capturing what is known statically about the output type of this DoFn instance's most-derived class.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.beam.sdk.transforms.SerializableFunction

apply

Constructor Detail

SimpleFunction

public SimpleFunction()

Method Detail

getInputTypeDescriptor

public TypeDescriptor<InputT> getInputTypeDescriptor()

Returns a TypeDescriptor capturing what is known statically about the input type of this DoFn instance's most-derived class.

See getOutputTypeDescriptor() for more discussion.

getOutputTypeDescriptor

public TypeDescriptor<OutputT> getOutputTypeDescriptor()

Returns a TypeDescriptor capturing what is known statically about the output type of this DoFn instance's most-derived class.

In the normal case of a concrete DoFn subclass with no generic type parameters of its own (including anonymous inner classes), this will be a complete non-generic type, which is good for choosing a default output Coder<OutputT> for the output PCollection<OutputT>.