Reducer (Support SDK - v509)

java.lang.Object
- zendesk.support.suas.Reducer<E>

Type Parameters:

E - type of the state
```
public abstract class Reducer<E>
extends java.lang.Object
```
Definition of a Reducer. The implementation should be able to mutate state on a provided Action.
Each Reducer implementation is responsible for a certain type of state.

Constructor Summary

Constructors
Constructor and Description

Reducer()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`abstract E`	`getInitialState()` Returns an empty or default instance of `E`.
`java.lang.String`	`getStateKey()` Gets a state key that's unique among all `Reducer`.
`abstract E`	`reduce(E state, Action<?> action)` Reduce state.

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

- Constructor Detail
  - Reducer
```
public Reducer()
```
- Method Detail
  - reduce
```
public abstract E reduce(E state,
                         Action<?> action)
```
    Reduce state. Apply the provided action on the oldState.
    
    Returns:
    
    the new state, or null if nothing has changed
  - getInitialState
```
public abstract E getInitialState()
```
    Returns an empty or default instance of E.
  - getStateKey
```
public java.lang.String getStateKey()
```
    Gets a state key that's unique among all Reducer.