MapFnRunners (harness 2.68.0 API)

java.lang.Object
- org.apache.beam.fn.harness.MapFnRunners

```
public abstract class MapFnRunners
extends java.lang.Object
```
Utilities to create PTransformRunners which execute simple map functions.
Simple map functions are used in a large number of transforms, especially runner-managed transforms, such as map_windows.
TODO: Add support for DoFns which are actually user supplied map/lambda functions instead of using the FnApiDoFnRunner instance.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static interface`	`MapFnRunners.ValueMapFnFactory<InputT,OutputT>`	A function factory which given a PTransform returns a map function.
`static interface`	`MapFnRunners.WindowedValueMapFnFactory<InputT,OutputT>`	A function factory which given a PTransform returns a map function over the entire `WindowedValue` of input and output elements.

Constructor Summary

Constructors
Constructor Description

MapFnRunners()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <InputT,OutputT> PTransformRunnerFactory`	`forValueMapFnFactory(MapFnRunners.ValueMapFnFactory<InputT,OutputT> fnFactory)`	Create a `MapFnRunners` where the map function consumes elements directly.
`static <InputT,OutputT> PTransformRunnerFactory`	`forWindowedValueMapFnFactory(MapFnRunners.WindowedValueMapFnFactory<InputT,OutputT> fnFactory)`	Create a `MapFnRunners` where the map function consumes `Windowed Values` and produced `Windowed Values`.

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

- Constructor Detail
  - MapFnRunners
```
public MapFnRunners()
```
- Method Detail
  - forValueMapFnFactory
```
public static <InputT,OutputT> PTransformRunnerFactory forValueMapFnFactory(MapFnRunners.ValueMapFnFactory<InputT,OutputT> fnFactory)
```
    Create a MapFnRunners where the map function consumes elements directly.
  - forWindowedValueMapFnFactory
```
public static <InputT,OutputT> PTransformRunnerFactory forWindowedValueMapFnFactory(MapFnRunners.WindowedValueMapFnFactory<InputT,OutputT> fnFactory)
```
    Create a MapFnRunners where the map function consumes Windowed Values and produced Windowed Values.
    Each WindowedValue provided to the function produced by the MapFnRunners.WindowedValueMapFnFactory will be in exactly one window.