org.apache.beam.sdk.transforms.windowing

Class NonMergingWindowFn<T,W extends BoundedWindow>

java.lang.Object

org.apache.beam.sdk.transforms.windowing.WindowFn<T,W>

org.apache.beam.sdk.transforms.windowing.NonMergingWindowFn<T,W>

Type Parameters:

T - type of elements being windowed

W - BoundedWindow subclass used to represent the windows used by this WindowFn

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Direct Known Subclasses:

GlobalWindows, PartitioningWindowFn, SlidingWindows, TVFSlidingWindowFn

public abstract class NonMergingWindowFn<T,W extends BoundedWindow>
extends WindowFn<T,W>

Abstract base class for WindowFns that do not merge windows.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.beam.sdk.transforms.windowing.WindowFn

WindowFn.AssignContext, WindowFn.MergeContext

Constructor Summary

Constructors

Constructor and Description
NonMergingWindowFn()

Method Summary

Modifier and Type	Method and Description
boolean	isNonMerging() Returns true if this WindowFn never needs to merge any windows.
void	mergeWindows(WindowFn.MergeContext c) Does whatever merging of windows is necessary.

Methods inherited from class org.apache.beam.sdk.transforms.windowing.WindowFn

assignsToOneWindow, assignWindows, getDefaultWindowMappingFn, getWindowTypeDescriptor, isCompatible, populateDisplayData, verifyCompatibility, windowCoder

Methods inherited from class java.lang.Object

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

Constructor Detail

NonMergingWindowFn

public NonMergingWindowFn()

Method Detail

mergeWindows

public final void mergeWindows(WindowFn.MergeContext c)

Description copied from class: WindowFn

Does whatever merging of windows is necessary.

See MergeOverlappingIntervalWindows.mergeWindows(org.apache.beam.sdk.transforms.windowing.WindowFn<?, org.apache.beam.sdk.transforms.windowing.IntervalWindow>.MergeContext) for an example of how to override this method.

Specified by:

mergeWindows in class WindowFn<T,W extends BoundedWindow>

isNonMerging

public final boolean isNonMerging()

Description copied from class: WindowFn

Returns true if this WindowFn never needs to merge any windows.

Overrides:

isNonMerging in class WindowFn<T,W extends BoundedWindow>