OSID - osid.inventory.ItemWarehouseAssignmentSession Service Interface Definition

Interface	osid.inventory.ItemWarehouseAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign `Items` to `Warehouse` objects An `Item` may appear in multiple `Warehouse` objects and removing the last reference to an `Item` is the equivalent of deleting it. Each `Warehouse` may have its own authorizations governing who is allowed to operate on it. Adding a reference of an `Item` to another `Warehouse` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignItems
Description	Tests if this user can alter item/warehouse 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 assignment operations to unauthorized users.
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignItemToWarehouse
Description	Tests if this user can alter item/warehouse 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`	`warehouseId`	the `Id` of the `Warehouse`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`warehouseId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableWarehouseIds
Description	Gets a list of warehouses including and under the given warehouse node in which any item can be assigned.
Parameters	`osid.id.Id`	`warehouseId`	the `Id` of the `Warehouse`
Return	`osid.id.IdList`		list of assignable warehouse `Ids`
Errors	NULL_ARGUMENT		`warehouseId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableWarehouseIdsForItem
Description	Gets a list of warehouses including and under the given warehouse node in which a specific item can be assigned.
Parameters	`osid.id.Id`	`warehouseId`	the `Id` of the `Warehouse`
Parameters	`osid.id.Id`	`itemId`	the `Id` of the `Item`
Return	`osid.id.IdList`		list of assignable warehouse `Ids`
Errors	NULL_ARGUMENT		`warehouseId` or `itemId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignItemToWarehouse
Description	Adds an existing `Item` to a `Warehouse.`
Parameters	`osid.id.Id`	`itemId`	the `Id` of the `Item`
Parameters	`osid.id.Id`	`warehouseId`	the `Id` of the `Warehouse`
Errors	ALREADY_EXISTS		`itemId` is already assigned to `warehouseId`
	NOT_FOUND		`itemId` or `warehouseId` not found
	NULL_ARGUMENT		`itemId` or `warehouseId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignItemFromWarehouse
Description	Removes an `Item` from a `Warehouse.`
Parameters	`osid.id.Id`	`itemId`	the `Id` of the `Item`
Parameters	`osid.id.Id`	`warehouseId`	the `Id` of the `Warehouse`
Errors	NOT_FOUND		`itemId` or `warehouseId` not found or `itemId` not assigned `warehouseId`
	NULL_ARGUMENT		`itemId` or `warehouseId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.