org.apache.beam.sdk.transforms

Class Materializations

java.lang.Object

org.apache.beam.sdk.transforms.Materializations

@Internal
public class Materializations
extends java.lang.Object

For internal use only; no backwards-compatibility guarantees.

Utility methods for constructing known materializations for a ViewFn.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Materializations.IterableView<V> Represents the PrimitiveViewT supplied to the ViewFn when it declares to use the iterable materialization.
static interface	Materializations.MultimapView<K,V> Represents the PrimitiveViewT supplied to the ViewFn when it declares to use the multimap materialization.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ITERABLE_MATERIALIZATION_URN The URN for a Materialization where the primitive view type is an iterable of fully specified windowed values.
static java.lang.String	MULTIMAP_MATERIALIZATION_URN The URN for a Materialization where the primitive view type is a multimap of fully specified windowed values.

Constructor Summary

Constructors

Constructor and Description
Materializations()

Method Summary

Modifier and Type	Method and Description
static <V> Materialization<Materializations.IterableView<V>>	iterable() For internal use only; no backwards-compatibility guarantees.
static <K,V> Materialization<Materializations.MultimapView<K,V>>	multimap() For internal use only; no backwards-compatibility guarantees.

Methods inherited from class java.lang.Object

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

Field Detail

ITERABLE_MATERIALIZATION_URN

public static final java.lang.String ITERABLE_MATERIALIZATION_URN

The URN for a Materialization where the primitive view type is an iterable of fully specified windowed values.

See Also:

Constant Field Values

MULTIMAP_MATERIALIZATION_URN

public static final java.lang.String MULTIMAP_MATERIALIZATION_URN

The URN for a Materialization where the primitive view type is a multimap of fully specified windowed values.

See Also:

Constant Field Values

Constructor Detail

Materializations

public Materializations()

Method Detail

multimap

@Internal
public static <K,V> Materialization<Materializations.MultimapView<K,V>> multimap()

For internal use only; no backwards-compatibility guarantees.

A Materialization where the primitive view type is a multimap with fully specified windowed values.

iterable

@Internal
public static <V> Materialization<Materializations.IterableView<V>> iterable()

For internal use only; no backwards-compatibility guarantees.

A Materialization where the primitive view type is an iterable with fully specifed windowed values.