OSID - osid.process.StateSequencingSession Service Interface Definition

Interface	osid.process.StateSequencingSession
Implements	`osid.OsidSession`
Used By	`osid.process.ProcessManager`
Used By	`osid.process.ProcessProxyManager`
Description	This session manages state sequences.
Method	getProcessId
Description	Gets the `Process` `Id` associated with this session.
Return	`osid.id.Id`		the `Process Id` associated with this session
Compliance	`mandatory`		This method must be implemented.
Method	getProcess
Description	Gets the `Process` associated with this session.
Return	`osid.process.Process`		the `Process` associated with this session
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canSequenceStates
Description	Tests if this user can sequence `States`. A return of true does not guarantee successful authorization. A return of false indicates that it is known these methods `PERMISSION_DENIED`. This is intended as a hint to an application that may opts not to offer these operations to unauthorized users.
Return	`boolean`		`false` if `State` sequencing is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	addValidNextState
Description	Adds a valid next state.
Parameters	`osid.id.Id`	`stateId`	the `Id` of the `State`
Parameters	`osid.id.Id`	`nextStateId`	the `Id` of the next `State`
Errors	NOT_FOUND		`stateId` or `nextStateId` is not found
	NULL_ARGUMENT		`stateId` or `nextStateId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	removeValidNextState
Description	Removes a valid next state.
Parameters	`osid.id.Id`	`stateId`	the `Id` of the `State`
Parameters	`osid.id.Id`	`nextStateId`	the `Id` of the next `State`
Errors	NOT_FOUND		`stateId` or `nextStateId` is not found
	NULL_ARGUMENT		`stateId` or `nextStateId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.