org.apache.beam.sdk.util

Class CombineFnUtil

java.lang.Object

org.apache.beam.sdk.util.CombineFnUtil

@Internal
public class CombineFnUtil
extends java.lang.Object

Static utility methods that create combine function instances.

Constructor Summary

Constructors

Constructor and Description
CombineFnUtil()

Method Summary

Modifier and Type	Method and Description
static <K,InputT,AccumT,OutputT> Combine.CombineFn<InputT,AccumT,OutputT>	bindContext(CombineWithContext.CombineFnWithContext<InputT,AccumT,OutputT> combineFn, StateContext<?> stateContext) Returns the partial application of the CombineWithContext.CombineFnWithContext to a specific context to produce a Combine.CombineFn.
static <InputT,AccumT,OutputT> CombineWithContext.CombineFnWithContext<InputT,AccumT,OutputT>	toFnWithContext(CombineFnBase.GlobalCombineFn<InputT,AccumT,OutputT> globalCombineFn) Return a CombineWithContext.CombineFnWithContext from the given CombineFnBase.GlobalCombineFn.

Methods inherited from class java.lang.Object

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

Constructor Detail

CombineFnUtil

public CombineFnUtil()

Method Detail

bindContext

public static <K,InputT,AccumT,OutputT> Combine.CombineFn<InputT,AccumT,OutputT> bindContext(CombineWithContext.CombineFnWithContext<InputT,AccumT,OutputT> combineFn,
                                                                                             StateContext<?> stateContext)

Returns the partial application of the CombineWithContext.CombineFnWithContext to a specific context to produce a Combine.CombineFn.

The returned Combine.CombineFn cannot be serialized.

toFnWithContext

public static <InputT,AccumT,OutputT> CombineWithContext.CombineFnWithContext<InputT,AccumT,OutputT> toFnWithContext(CombineFnBase.GlobalCombineFn<InputT,AccumT,OutputT> globalCombineFn)

Return a CombineWithContext.CombineFnWithContext from the given CombineFnBase.GlobalCombineFn.