Heat Resource 各个状态之间的变化

heat resource的状态是由：actions + statuses 一起来确定的。
ACTIONS = (
INIT, CREATE, DELETE, UPDATE, ROLLBACK,
SUSPEND, RESUME, ADOPT, SNAPSHOT, CHECK,
) = (
‘INIT’, ‘CREATE’, ‘DELETE’, ‘UPDATE’, ‘ROLLBACK’,
‘SUSPEND’, ‘RESUME’, ‘ADOPT’, ‘SNAPSHOT’, ‘CHECK’,
)
STATUSES = (IN_PROGRESS, FAILED, COMPLETE
) = (‘IN_PROGRESS’, ‘FAILED’, ‘COMPLETE’)
那个各个状态之间的合法转化是如何呢 ？