StateMachine (Couchbase, Inc. Enterprise Edition License Agreement 3.0.2-11)

java.lang.Object
- com.couchbase.lite.internal.utils.StateMachine<T>

Type Parameters:

T - states.
```
public final class StateMachine<T extends Enum<T>>
extends Object
```
A simple state machine.
This class is not thread safe!

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class StateMachine.Builder<S extends Enum<S>>

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`assertState(T... expected)`	Verify expected state.
`boolean`	`setState(T nextState)`	Set the new state.
`String`	`toString()`

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

- Method Detail
  - toString
```
@NonNull
public String toString()
```
    Overrides:
    
    toString in class Object
  - assertState
```
@SafeVarargs
public final boolean assertState(@NonNull
                                 T... expected)
```
    Verify expected state.
    
    Parameters:
    
    expected - expected states.
    
    Returns:
    
    true if the current state at the time of the call, is one of the expected states.
  - setState
```
public boolean setState(@NonNull
                        T nextState)
```
    Set the new state. If it is legal to transition to the new state, from the current state, do so, returning the now-previous state. If the transition is illegal do nothing and return null.
    
    Parameters:
    
    nextState - the requested new state
    
    Returns:
    
    the previous state, if the transition succeeds; null otherwise.