org.apache.beam.sdk.extensions.joinlibrary

Class Join.LeftOuterJoin<K,V1,V2>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<KV<K,V1>>,PCollection<KV<K,KV<V1,V2>>>>

org.apache.beam.sdk.extensions.joinlibrary.Join.LeftOuterJoin<K,V1,V2>

Type Parameters:

K - Type of the key for both collections

V1 - Type of the values for the left collection.

V2 - Type of the values for the right collection.

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

Join

public static class Join.LeftOuterJoin<K,V1,V2>
extends PTransform<PCollection<KV<K,V1>>,PCollection<KV<K,KV<V1,V2>>>>

PTransform representing a left outer join of two collections of KV elements.

See Also:

Serialized Form

Field Summary

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

annotations, displayData, name, resourceHints

Method Summary

Modifier and Type	Method and Description
PCollection<KV<K,KV<V1,V2>>>	expand(PCollection<KV<K,V1>> leftCollection) Override this method to specify how this PTransform should be expanded on the given InputT.
static <K,V1,V2> Join.LeftOuterJoin<K,V1,V2>	with(PCollection<KV<K,V2>> rightCollection, V2 nullValue)

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

addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Method Detail

with

public static <K,V1,V2> Join.LeftOuterJoin<K,V1,V2> with(PCollection<KV<K,V2>> rightCollection,
                                                         V2 nullValue)

expand

public PCollection<KV<K,KV<V1,V2>>> expand(PCollection<KV<K,V1>> leftCollection)

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<KV<K,V1>>,PCollection<KV<K,KV<V1,V2>>>>