OSID - osid.hold.BlockOublietteAssignmentSession Service Interface Definition

Interface	osid.hold.BlockOublietteAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign `Blocks` to `Oubliette` mappings. A `Block` may appear in multiple `Oubliette` objects and removing the last reference to a `Block` is the equivalent of deleting it. Each `Oubliette` may have its own authorizations governing who is allowed to operate on it. Adding a reference of a `Block` to another `Oubliette` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignBlocks
Description	Tests if this user can alter block/oubliette 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 hold is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignBlocksToOubliette
Description	Tests if this user can alter block/oubliette 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`	`oublietteId`	the `Id` of the `Oubliette`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`oublietteId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableOublietteIds
Description	Gets a list of oubliettes including and under the given oubliette node in which any block can be assigned.
Parameters	`osid.id.Id`	`oublietteId`	the `Id` of the `Oubliette`
Return	`osid.id.IdList`		list of assignable oubliette `Ids`
Errors	NULL_ARGUMENT		`oublietteId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableOublietteIdsForBlock
Description	Gets a list of oubliettes including and under the given oubliette node in which a specific block can be assigned.
Parameters	`osid.id.Id`	`oublietteId`	the `Id` of the `Oubliette`
Parameters	`osid.id.Id`	`blockId`	the `Id` of the `Block`
Return	`osid.id.IdList`		list of assignable oubliette `Ids`
Errors	NULL_ARGUMENT		`oublietteId` or `blockId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignBlockToOubliette
Description	Adds an existing `Block` to a `Oubliette.`
Parameters	`osid.id.Id`	`blockId`	the `Id` of the `Block`
Parameters	`osid.id.Id`	`oublietteId`	the `Id` of the `Oubliette`
Errors	ALREADY_EXISTS		`blockId` is already assigned to `oublietteId`
	NOT_FOUND		`blockId` or `oublietteId` not found
	NULL_ARGUMENT		`blockId` or `oublietteId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignBlockFromOubliette
Description	Removes a `Block` from a `Oubliette.`
Parameters	`osid.id.Id`	`blockId`	the `Id` of the `Block`
Parameters	`osid.id.Id`	`oublietteId`	the `Id` of the `Oubliette`
Errors	NOT_FOUND		`blockId` or `oublietteId` not found or `blockId` is not assigned to `oublietteId`
	NULL_ARGUMENT		`blockId` or `oublietteId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	reassignBlockToOubliette
Description	Moves a `Block` from one `Oubliette` to another. Mappings to other `Oubliettes` are unaffected.
Parameters	`osid.id.Id`	`blockId`	the `Id` of the `Block`
	`osid.id.Id`	`fromOublietteId`	the `Id` of the current `Oubliette`
	`osid.id.Id`	`toOublietteId`	the `Id` of the destination `Oubliette`
Errors	NOT_FOUND		`blockId, fromOublietteId,` or `toOublietteId` not found or `blockId` not mapped to `fromOublietteId`
	NULL_ARGUMENT		`blockId, fromOublietteId,` or `toOublietteId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.