ActionMapper (discord4j-common (3.2.2))

java.lang.Object
- discord4j.common.store.api.ActionMapper

```
public class ActionMapper
extends Object
```
Holds mappings between concrete StoreAction types and the code to execute when they are invoked.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class ActionMapper.Builder

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static ActionMapper`	`aggregate(ActionMapper... mappers)`	Aggregates the mappings contained in the given `mappers` into a single `ActionMapper` instance.
`static ActionMapper.Builder`	`builder()`	Initializes a new builder for an `ActionMapper`.
`static ActionMapper`	`empty()`	Returns an `ActionMapper` containing no mappings.
`<R> Optional<Function<StoreAction<R>,? extends Publisher<R>>>`	`findHandlerForAction(StoreAction<R> action)`	Retrieves the handler associated to the given action based on its concrete type.

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

- Method Detail
  - builder
```
public static ActionMapper.Builder builder()
```
    Initializes a new builder for an ActionMapper.
    
    Returns:
    
    a new builder
  - empty
```
public static ActionMapper empty()
```
    Returns an ActionMapper containing no mappings.
    
    Returns:
    
    an empty ActionMapper
  - aggregate
```
public static ActionMapper aggregate(ActionMapper... mappers)
```
    Aggregates the mappings contained in the given mappers into a single ActionMapper instance. All mappers must be defining distinct sets of actions, any conflicts will cause an IllegalStateException to be thrown.
    
    Parameters:
    
    mappers - the mappers to aggregate
    
    Returns:
    
    an aggregated ActionMapper
    
    Throws:
    
    IllegalStateException - if two or more mappers define a mapping for the same action type
  - findHandlerForAction
```
public <R> Optional<Function<StoreAction<R>,? extends Publisher<R>>> findHandlerForAction(StoreAction<R> action)
```
    Retrieves the handler associated to the given action based on its concrete type.
    
    Type Parameters:
    
    R - the return type of the action, to ensure type safety
    
    Parameters:
    
    action - the action to retrieve the handler for
    
    Returns:
    
    the handler for the given action, or Optional.empty() if not found.