org.apache.beam.sdk.extensions.sql

Class TypedCombineFnDelegate<InputT,AccumT,OutputT>

java.lang.Object

org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

org.apache.beam.sdk.extensions.sql.TypedCombineFnDelegate<InputT,AccumT,OutputT>

Type Parameters:

InputT - the type of input

AccumT - the type of accumulator

OutputT - the type of output

All Implemented Interfaces:

java.io.Serializable, org.apache.beam.sdk.transforms.CombineFnBase.GlobalCombineFn<InputT,AccumT,OutputT>, org.apache.beam.sdk.transforms.display.HasDisplayData

public class TypedCombineFnDelegate<InputT,AccumT,OutputT>
extends org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

A Combine.CombineFn delegating all relevant calls to given delegate. This is used to create a type anonymous class for cases where the CombineFn is a generic class. The anonymous class can then be used in a UDAF as

   .registerUdaf("UDAF", new TypedCombineFnDelegate<>(genericCombineFn) {})
 

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TypedCombineFnDelegate(org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT> delegate)

Method Summary

Modifier and Type	Method and Description
AccumT	addInput(AccumT mutableAccumulator, InputT input)
OutputT	apply(java.lang.Iterable<? extends InputT> inputs)
AccumT	compact(AccumT accumulator)
AccumT	createAccumulator()
OutputT	defaultValue()
OutputT	extractOutput(AccumT accumulator)
java.lang.reflect.TypeVariable<?>	getAccumTVariable()
org.apache.beam.sdk.coders.Coder<AccumT>	getAccumulatorCoder(org.apache.beam.sdk.coders.CoderRegistry registry, org.apache.beam.sdk.coders.Coder<InputT> inputCoder)
org.apache.beam.sdk.coders.Coder<OutputT>	getDefaultOutputCoder(org.apache.beam.sdk.coders.CoderRegistry registry, org.apache.beam.sdk.coders.Coder<InputT> inputCoder)
java.lang.String	getIncompatibleGlobalWindowErrorMessage()
java.lang.reflect.TypeVariable<?>	getInputTVariable()
org.apache.beam.sdk.values.TypeDescriptor<InputT>	getInputType()
java.lang.reflect.TypeVariable<?>	getOutputTVariable()
org.apache.beam.sdk.values.TypeDescriptor<OutputT>	getOutputType()
AccumT	mergeAccumulators(java.lang.Iterable<AccumT> accumulators)
void	populateDisplayData(org.apache.beam.sdk.transforms.display.DisplayData.Builder builder)

Methods inherited from class java.lang.Object

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

Constructor Detail

TypedCombineFnDelegate

protected TypedCombineFnDelegate(org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT> delegate)

Method Detail

getOutputType

public org.apache.beam.sdk.values.TypeDescriptor<OutputT> getOutputType()

Overrides:

getOutputType in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

getInputType

public org.apache.beam.sdk.values.TypeDescriptor<InputT> getInputType()

Overrides:

getInputType in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

createAccumulator

public AccumT createAccumulator()

Specified by:

createAccumulator in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

addInput

public AccumT addInput(AccumT mutableAccumulator,
                       InputT input)

Specified by:

addInput in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

mergeAccumulators

public AccumT mergeAccumulators(java.lang.Iterable<AccumT> accumulators)

Specified by:

mergeAccumulators in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

extractOutput

public OutputT extractOutput(AccumT accumulator)

Specified by:

extractOutput in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

compact

public AccumT compact(AccumT accumulator)

Overrides:

compact in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

apply

public OutputT apply(java.lang.Iterable<? extends InputT> inputs)

Overrides:

apply in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

defaultValue

public OutputT defaultValue()

Specified by:

defaultValue in interface org.apache.beam.sdk.transforms.CombineFnBase.GlobalCombineFn<InputT,AccumT,OutputT>

Overrides:

defaultValue in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

getAccumulatorCoder

public org.apache.beam.sdk.coders.Coder<AccumT> getAccumulatorCoder(org.apache.beam.sdk.coders.CoderRegistry registry,
                                                                    org.apache.beam.sdk.coders.Coder<InputT> inputCoder)
                                                             throws org.apache.beam.sdk.coders.CannotProvideCoderException

Specified by:

getAccumulatorCoder in interface org.apache.beam.sdk.transforms.CombineFnBase.GlobalCombineFn<InputT,AccumT,OutputT>

Throws:

org.apache.beam.sdk.coders.CannotProvideCoderException

getDefaultOutputCoder

public org.apache.beam.sdk.coders.Coder<OutputT> getDefaultOutputCoder(org.apache.beam.sdk.coders.CoderRegistry registry,
                                                                       org.apache.beam.sdk.coders.Coder<InputT> inputCoder)
                                                                throws org.apache.beam.sdk.coders.CannotProvideCoderException

Specified by:

getDefaultOutputCoder in interface org.apache.beam.sdk.transforms.CombineFnBase.GlobalCombineFn<InputT,AccumT,OutputT>

Throws:

org.apache.beam.sdk.coders.CannotProvideCoderException

getIncompatibleGlobalWindowErrorMessage

public java.lang.String getIncompatibleGlobalWindowErrorMessage()

Specified by:

getIncompatibleGlobalWindowErrorMessage in interface org.apache.beam.sdk.transforms.CombineFnBase.GlobalCombineFn<InputT,AccumT,OutputT>

Overrides:

getIncompatibleGlobalWindowErrorMessage in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

getInputTVariable

public java.lang.reflect.TypeVariable<?> getInputTVariable()

Overrides:

getInputTVariable in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

getAccumTVariable

public java.lang.reflect.TypeVariable<?> getAccumTVariable()

Overrides:

getAccumTVariable in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

getOutputTVariable

public java.lang.reflect.TypeVariable<?> getOutputTVariable()

Overrides:

getOutputTVariable in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>

populateDisplayData

public void populateDisplayData(org.apache.beam.sdk.transforms.display.DisplayData.Builder builder)

Specified by:

populateDisplayData in interface org.apache.beam.sdk.transforms.display.HasDisplayData

Overrides:

populateDisplayData in class org.apache.beam.sdk.transforms.Combine.CombineFn<InputT,AccumT,OutputT>