NonMergingWindowFn (core 2.44.0 API)

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, IdentityWindowFn, PartitioningWindowFn, SlidingWindows
```
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 Description

NonMergingWindowFn()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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.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>