OSID - osid.rules.check.InstructionEngineAssignmentSession Service Interface Definition

Interface	osid.rules.check.InstructionEngineAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign `Instructions` to `Engine` mappings. An `Instruction` may appear in multiple `Engine` objects and removing the last reference to an `Instruction` is the equivalent of deleting it. Each `Engine` may have its own authorizations governing who is allowed to operate on it. Adding a reference of an `Instruction` to another `Engine` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignInstructions
Description	Tests if this user can alter instruction/engine mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer lookup operations to unauthorized users.
Return	`boolean`		`false` if instruction is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignInstructionsToEngine
Description	Tests if this user can alter instruction/engine mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer lookup operations to unauthorized users.
Parameters	`osid.id.Id`	`engineId`	the `Id` of the `Engine`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`engineId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableEngineIds
Description	Gets a list of engines including and under the given engine node in which any instruction can be assigned.
Parameters	`osid.id.Id`	`engineId`	the `Id` of the `Engine`
Return	`osid.id.IdList`		list of assignable engine `Ids`
Errors	NULL_ARGUMENT		`engineId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableEngineIdsForInstruction
Description	Gets a list of engines including and under the given engine node in which a specific instruction can be assigned.
Parameters	`osid.id.Id`	`engineId`	the `Id` of the `Engine`
Parameters	`osid.id.Id`	`instructionId`	the `Id` of the `Instruction`
Return	`osid.id.IdList`		list of assignable engine `Ids`
Errors	NULL_ARGUMENT		`engineId` or `instructionId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignInstructionToEngine
Description	Adds an existing `Instruction` to a `Engine.`
Parameters	`osid.id.Id`	`instructionId`	the `Id` of the `Instruction`
Parameters	`osid.id.Id`	`engineId`	the `Id` of the `Engine`
Errors	ALREADY_EXISTS		`instructionId` is already assigned to `engineId`
	NOT_FOUND		`instructionId` or `engineId` not found
	NULL_ARGUMENT		`instructionId` or `engineId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignInstructionFromEngine
Description	Removes an `Instruction` from a `Engine.`
Parameters	`osid.id.Id`	`instructionId`	the `Id` of the `Instruction`
Parameters	`osid.id.Id`	`engineId`	the `Id` of the `Engine`
Errors	NOT_FOUND		`instructionId` or `engineId` not found or `instructionId` not assigned to `engineId`
	NULL_ARGUMENT		`instructionId` or `engineId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.