Package org.apache.beam.sdk.values

Class PCollectionViews.IterableBackedListViewFn<T>

java.lang.Object

org.apache.beam.sdk.transforms.ViewFn<Materializations.IterableView<T>,List<T>>

org.apache.beam.sdk.values.PCollectionViews.IterableBackedListViewFn<T>

All Implemented Interfaces:

Serializable

Enclosing class:

PCollectionViews

public static class PCollectionViews.IterableBackedListViewFn<T>
extends ViewFn<Materializations.IterableView<T>,List<T>>

Implementation which is able to adapt an iterable materialization to a List<T>.

Unlike ListViewFn2, this implementation is optimized for iteration rather than indexing.

For internal use only.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
IterableBackedListViewFn(PCollectionViews.TypeDescriptorSupplier<T> typeDescriptorSupplier)

Method Summary

Modifier and Type	Method	Description
List<T>	apply(Materializations.IterableView<T> primitiveViewT)	A function to adapt a primitive view type to a desired view type.
boolean	equals(@Nullable Object other)
Materialization<Materializations.IterableView<T>>	getMaterialization()	Gets the materialization of this ViewFn.
TypeDescriptor<List<T>>	getTypeDescriptor()	Return the TypeDescriptor describing the output of this fn.
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Details

IterableBackedListViewFn

public IterableBackedListViewFn(PCollectionViews.TypeDescriptorSupplier<T> typeDescriptorSupplier)

Method Details

getMaterialization

public Materialization<Materializations.IterableView<T>> getMaterialization()

Description copied from class: ViewFn

Gets the materialization of this ViewFn.

Specified by:

getMaterialization in class ViewFn<Materializations.IterableView<T>,List<T>>

apply

public List<T> apply(Materializations.IterableView<T> primitiveViewT)

Description copied from class: ViewFn

A function to adapt a primitive view type to a desired view type.

Specified by:

apply in class ViewFn<Materializations.IterableView<T>,List<T>>

getTypeDescriptor

public TypeDescriptor<List<T>> getTypeDescriptor()

Description copied from class: ViewFn

Return the TypeDescriptor describing the output of this fn.

Specified by:

getTypeDescriptor in class ViewFn<Materializations.IterableView<T>,List<T>>

equals

public boolean equals(@Nullable Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object