Package com.alibaba.cola.statemachine

Interface Transition<S,E,C>

Type Parameters:

S - the type of state

E - the type of event

C - the type of user defined context, which is used to hold application data

All Known Implementing Classes:

TransitionImpl

public interface Transition<S,E,C>

Transition is something what a state machine associates with a state changes.

Author:

Frank Zhang

Method Summary

Modifier and Type	Method	Description
Action<S,E,C>	getAction()
Condition<C>	getCondition()	Gets the guard of this transition.
E	getEvent()
State<S,E,C>	getSource()	Gets the source state of this transition.
State<S,E,C>	getTarget()	Gets the target state of this transition.
void	setAction(Action<S,E,C> action)
void	setCondition(Condition<C> condition)
void	setEvent(E event)
void	setSource(State<S,E,C> state)
void	setTarget(State<S,E,C> state)
void	setType(TransitionType type)
State<S,E,C>	transit(C ctx, boolean checkCondition)	Do transition from source state to target state.
void	verify()	Verify transition correctness

Method Detail

getSource

State<S,E,C> getSource()

Gets the source state of this transition.

Returns:

the source state

setSource

void setSource(State<S,E,C> state)

getEvent

E getEvent()

setEvent

void setEvent(E event)

setType

void setType(TransitionType type)

getTarget

State<S,E,C> getTarget()

Gets the target state of this transition.

Returns:

the target state

setTarget

void setTarget(State<S,E,C> state)

getCondition

Condition<C> getCondition()

Gets the guard of this transition.

Returns:

the guard

setCondition

void setCondition(Condition<C> condition)

getAction

Action<S,E,C> getAction()

setAction

void setAction(Action<S,E,C> action)

transit

State<S,E,C> transit(C ctx,
                                 boolean checkCondition)

Do transition from source state to target state.

Returns:

the target state

verify

void verify()

Verify transition correctness