org.apache.beam.sdk.transforms

Class Deduplicate.WithRepresentativeValues<T,IdT>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<T>,PCollection<T>>

org.apache.beam.sdk.transforms.Deduplicate.WithRepresentativeValues<T,IdT>

Type Parameters:

T - the type of input and output element

IdT - the type of representative values used to dedup

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

Deduplicate

public static final class Deduplicate.WithRepresentativeValues<T,IdT>
extends PTransform<PCollection<T>,PCollection<T>>

A PTransform that uses a SerializableFunction to obtain a representative value for each input element used for deduplication.

Construct via Deduplicate.withRepresentativeValueFn(org.apache.beam.sdk.transforms.SerializableFunction<T, IdT>).

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

name, resourceHints

Method Summary

Modifier and Type	Method and Description
PCollection<T>	expand(PCollection<T> input) Override this method to specify how this PTransform should be expanded on the given InputT.
Deduplicate.WithRepresentativeValues<T,IdT>	withDuration(Duration duration) Return a WithRepresentativeValues PTransform that is like this one, but with the specified deduplication duration.
Deduplicate.WithRepresentativeValues<T,IdT>	withRepresentativeCoder(Coder<IdT> coder) Return a WithRepresentativeValues PTransform that is like this one, but with the specified id type coder.
Deduplicate.WithRepresentativeValues<T,IdT>	withRepresentativeType(TypeDescriptor<IdT> type) Return a WithRepresentativeValues PTransform that is like this one, but with the specified id type descriptor.
Deduplicate.WithRepresentativeValues<T,IdT>	withTimeDomain(TimeDomain timeDomain) Returns a WithRepresentativeValues PTransform like this one but with the specified time domain.

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Method Detail

withRepresentativeType

public Deduplicate.WithRepresentativeValues<T,IdT> withRepresentativeType(TypeDescriptor<IdT> type)

Return a WithRepresentativeValues PTransform that is like this one, but with the specified id type descriptor.

Either withRepresentativeCoder(org.apache.beam.sdk.coders.Coder<IdT>) or this method must be invoked if using Deduplicate.withRepresentativeValueFn(org.apache.beam.sdk.transforms.SerializableFunction<T, IdT>) in Java 8 with a lambda as the fn.

Parameters:

type - a TypeDescriptor describing the representative type of this WithRepresentativeValues

Returns:

A WithRepresentativeValues PTransform that is like this one, but with the specified representative value type descriptor. Any previously set representative value coder will be cleared.

withRepresentativeCoder

public Deduplicate.WithRepresentativeValues<T,IdT> withRepresentativeCoder(Coder<IdT> coder)

Return a WithRepresentativeValues PTransform that is like this one, but with the specified id type coder.

Required for use of Deduplicate.withRepresentativeValueFn(org.apache.beam.sdk.transforms.SerializableFunction<T, IdT>) in Java 8 with a lambda as the fn.

Parameters:

coder - a Coder capable of encoding the representative type of this WithRepresentativeValues

Returns:

A WithRepresentativeValues PTransform that is like this one, but with the specified representative value coder. Any previously set representative value type descriptor will be cleared.

withTimeDomain

public Deduplicate.WithRepresentativeValues<T,IdT> withTimeDomain(TimeDomain timeDomain)

Returns a WithRepresentativeValues PTransform like this one but with the specified time domain.

withDuration

public Deduplicate.WithRepresentativeValues<T,IdT> withDuration(Duration duration)

Return a WithRepresentativeValues PTransform that is like this one, but with the specified deduplication duration.

expand

public PCollection<T> expand(PCollection<T> input)

Description copied from class: PTransform

Override this method to specify how this PTransform should be expanded on the given InputT.

NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.

Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).

Specified by:

expand in class PTransform<PCollection<T>,PCollection<T>>