PCollectionViews.MapViewFn2 (core 2.44.0 API)

java.lang.Object
- org.apache.beam.sdk.transforms.ViewFn<Materializations.MultimapView<K,V>,java.util.Map<K,V>>
- - org.apache.beam.sdk.values.PCollectionViews.MapViewFn2<K,V>

All Implemented Interfaces:

java.io.Serializable

Enclosing class:

PCollectionViews
```
@Internal
public static class PCollectionViews.MapViewFn2<K,V>
extends ViewFn<Materializations.MultimapView<K,V>,java.util.Map<K,V>>
```
Implementation which is able to adapt a multimap materialization to a Map<K, V>.
For internal use only.
Instantiate via PCollectionViews.mapView(org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K, V>>, org.apache.beam.sdk.values.PCollectionViews.TypeDescriptorSupplier<K>, org.apache.beam.sdk.values.PCollectionViews.TypeDescriptorSupplier<V>, org.apache.beam.sdk.values.WindowingStrategy<?, W>).
PCollectionViews.MapViewFn is meant to be removed in the future and replaced with this class.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`MapViewFn2(PCollectionViews.TypeDescriptorSupplier<K> keyTypeDescriptorSupplier, PCollectionViews.TypeDescriptorSupplier<V> valueTypeDescriptorSupplier)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.util.Map<K,V>`	`apply(Materializations.MultimapView<K,V> primitiveViewT)`	A function to adapt a primitive view type to a desired view type.
`Materialization<Materializations.MultimapView<K,V>>`	`getMaterialization()`	Gets the materialization of this `ViewFn`.
`TypeDescriptor<java.util.Map<K,V>>`	`getTypeDescriptor()`	Return the `TypeDescriptor` describing the output of this fn.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MapViewFn2
```
public MapViewFn2(PCollectionViews.TypeDescriptorSupplier<K> keyTypeDescriptorSupplier,
                  PCollectionViews.TypeDescriptorSupplier<V> valueTypeDescriptorSupplier)
```
- Method Detail
  - getMaterialization
```
public Materialization<Materializations.MultimapView<K,V>> getMaterialization()
```
    Description copied from class: ViewFn
    
    Gets the materialization of this ViewFn.
    
    Specified by:
    
    getMaterialization in class ViewFn<Materializations.MultimapView<K,V>,java.util.Map<K,V>>
  - apply
```
public java.util.Map<K,V> apply(Materializations.MultimapView<K,V> 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.MultimapView<K,V>,java.util.Map<K,V>>
  - getTypeDescriptor
```
public TypeDescriptor<java.util.Map<K,V>> getTypeDescriptor()
```
    Description copied from class: ViewFn
    
    Return the TypeDescriptor describing the output of this fn.
    
    Specified by:
    
    getTypeDescriptor in class ViewFn<Materializations.MultimapView<K,V>,java.util.Map<K,V>>