OSID - osid.room.squatting.LeaseCampusAssignmentSession Service Interface Definition

Interface	osid.room.squatting.LeaseCampusAssignmentSession
Implements	`osid.OsidSession`
Used By	`osid.room.squatting.RoomSquattingManager`
Used By	`osid.room.squatting.RoomSquattingProxyManager`
Description	This session provides methods to re-assign `Leases` to `Campuses`. A `Lease` may map to multiple `Campuses` and removing the last reference to a `Lease` is the equivalent of deleting it. Each `Campus` may have its own authorizations governing who is allowed to operate on it. Adding a reference of a `Lease` to another `Campus` is not a copy operation (eg: does not change its `Id`).
Method	canAssignLeases
Description	Tests if this user can alter lease/campus 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	canAssignLeasesToCampus
Description	Tests if this user can alter lease/campus 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.
Parameters	`osid.id.Id`	`campusId`	the `Id` of the `Campus`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`campusId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableCampusIds
Description	Gets a list of campuses including and under the given campus node in which any lease can be assigned.
Parameters	`osid.id.Id`	`campusId`	the `Id` of the `Campus`
Return	`osid.id.IdList`		list of assignable campus `Ids`
Errors	NULL_ARGUMENT		`campusId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableCampusIdsForLease
Description	Gets a list of campuses including and under the given campus node in which a specific lease can be assigned.
Parameters	`osid.id.Id`	`campusId`	the `Id` of the `Campus`
Parameters	`osid.id.Id`	`leaseId`	the `Id` of the `Lease`
Return	`osid.id.IdList`		list of assignable campus `Ids`
Errors	NULL_ARGUMENT		`campusId` or `leaseId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignLeaseToCampus
Description	Adds an existing `Lease` to a `Campus`.
Parameters	`osid.id.Id`	`leaseId`	the `Id` of the `Lease`
Parameters	`osid.id.Id`	`campusId`	the `Id` of the `Campus`
Errors	ALREADY_EXISTS		`leaseId` is already assigned to `campusId`
	NOT_FOUND		`leaseId` or `campusId` not found
	NULL_ARGUMENT		`leaseId` or `campusId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignLeaseFromCampus
Description	Removes a `Lease` from a `Campus`.
Parameters	`osid.id.Id`	`leaseId`	the `Id` of the `Lease`
Parameters	`osid.id.Id`	`campusId`	the `Id` of the `Campus`
Errors	NOT_FOUND		`leaseId` or `campusId` not found or `leaseId` not assigned to `campusId`
	NULL_ARGUMENT		`leaseId` or `campusId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	reassignLeaseToCampus
Description	Moves a `Lease` from one `Campus` to another. Mappings to other `Campuses` are unaffected.
Parameters	`osid.id.Id`	`leaseId`	the `Id` of the `Lease`
	`osid.id.Id`	`fromCampusId`	the `Id` of the current `Campus`
	`osid.id.Id`	`toCampusId`	the `Id` of the destination `Campus`
Errors	ALREADY_EXISTS		`leaseId` already assigned to `toCampusId`
	NOT_FOUND		`leaseId, fromCampusId`, or `toCampusId` not found or `leaseId` not mapped to `fromCampusId`
	NULL_ARGUMENT		`leaseId, fromCampusId`, or `toCampusId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.