The purpose of implementing a state machine using Enums is so that the state doesn't have to be explicitly set.
Instead, the logic is provided on how to transition from one to the next.
State Machine Transition
public enum CmHandleState {
Advised {
@Override
public CmHandleState nextState() {
return Locked;
}
@Override
public String cmHandleState() {
return "ADVISED";
}
},
Locked {
@Override
public CmHandleState nextState() {
return Ready;
}
@Override
public String cmHandleState() {
return "LOCKED";
}
},
Ready {
@Override
public CmHandleState nextState() {
return this;
}
@Override
public String cmHandleState() {
return "LOCKED";
}
};
public abstract CmHandleState nextState();
public abstract String cmHandleState();