org.apache.beam.sdk.transforms

Class CombineFns.ComposeCombineFnBuilder

java.lang.Object

org.apache.beam.sdk.transforms.CombineFns.ComposeCombineFnBuilder

Enclosing class:

CombineFns

public static class CombineFns.ComposeCombineFnBuilder
extends java.lang.Object

A builder class to construct a composed CombineFnBase.GlobalCombineFn.

Constructor Summary

Constructors

Constructor and Description
ComposeCombineFnBuilder()

Method Summary

Modifier and Type	Method and Description
<DataT,InputT,OutputT> CombineFns.ComposedCombineFn<DataT>	with(SimpleFunction<DataT,InputT> extractInputFn, Combine.CombineFn<InputT,?,OutputT> combineFn, TupleTag<OutputT> outputTag) Returns a CombineFns.ComposedCombineFn that can take additional GlobalCombineFns and apply them as a single combine function.
<DataT,InputT,OutputT> CombineFns.ComposedCombineFnWithContext<DataT>	with(SimpleFunction<DataT,InputT> extractInputFn, CombineWithContext.CombineFnWithContext<InputT,?,OutputT> combineFnWithContext, TupleTag<OutputT> outputTag) Returns a CombineFns.ComposedCombineFnWithContext that can take additional GlobalCombineFns and apply them as a single combine function.

Methods inherited from class java.lang.Object

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

Constructor Detail

ComposeCombineFnBuilder

public ComposeCombineFnBuilder()

Method Detail

with

public <DataT,InputT,OutputT> CombineFns.ComposedCombineFn<DataT> with(SimpleFunction<DataT,InputT> extractInputFn,
                                                                       Combine.CombineFn<InputT,?,OutputT> combineFn,
                                                                       TupleTag<OutputT> outputTag)

Returns a CombineFns.ComposedCombineFn that can take additional GlobalCombineFns and apply them as a single combine function.

The CombineFns.ComposedCombineFn extracts inputs from DataT with the extractInputFn and combines them with the combineFn, and then it outputs each combined value with a TupleTag to a CombineFns.CoCombineResult.

with

public <DataT,InputT,OutputT> CombineFns.ComposedCombineFnWithContext<DataT> with(SimpleFunction<DataT,InputT> extractInputFn,
                                                                                  CombineWithContext.CombineFnWithContext<InputT,?,OutputT> combineFnWithContext,
                                                                                  TupleTag<OutputT> outputTag)

Returns a CombineFns.ComposedCombineFnWithContext that can take additional GlobalCombineFns and apply them as a single combine function.

The CombineFns.ComposedCombineFnWithContext extracts inputs from DataT with the extractInputFn and combines them with the combineFnWithContext, and then it outputs each combined value with a TupleTag to a CombineFns.CoCombineResult.