OSID - osid.metering.MeterUtilitySession Service Interface Definition

Interface	osid.metering.MeterUtilitySession
Implements	`osid.OsidSession`
Used By	`osid.metering.MeteringManager`
Used By	`osid.metering.MeteringProxyManager`
Description	This session provides methods to retrieve `Meter` to `Utility` mappings. A `Meter` may appear in multiple `Utility` objects. Each catalog may have its own authorizations governing who is allowed to look at it. This lookup session defines several views: comparative view: elements may be silently omitted or re-ordered plenary view: provides a complete result set or is an error condition
Method	canLookupMeterUtilityMappings
Description	Tests if this user can perform lookups of meter/utility mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known lookup 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 looking up mappings is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	useComparativeUtilityView
Description	The returns from the lookup methods may omit or translate elements based on this session, such as authorization, and not result in an error. This view is used when greater interoperability is desired at the expense of precision.
Compliance	`mandatory`		This method is must be implemented.
Method	usePlenaryUtilityView
Description	A complete view of the `Meter` and `Utility` returns is desired. Methods will return what is requested or result in an error. This view is used when greater precision is desired at the expense of interoperability.
Compliance	`mandatory`		This method is must be implemented.
Method	getMeterIdsByUtility
Description	Gets the list of `Meter Ids` associated with a `Utility`.
Parameters	`osid.id.Id`	`utilityId`	`Id` of the `Utility`
Return	`osid.id.IdList`		list of related meter `Ids`
Errors	NOT_FOUND		`utilityId` is not found
	NULL_ARGUMENT		`utilityId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getMetersByUtility
Description	Gets the list of `Meters` associated with a `Utility`.
Parameters	`osid.id.Id`	`utilityId`	`Id` of the `Utility`
Return	`osid.metering.MeterList`		list of related meters
Errors	NOT_FOUND		`utilityId` is not found
	NULL_ARGUMENT		`utilityId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getMeterIdsByUtilities
Description	Gets the list of `Meter Ids` corresponding to a list of `Utility` objects.
Parameters	`osid.id.IdList`	`utilityIds`	list of utility `Ids`
Return	`osid.id.IdList`		list of meter `Ids`
Errors	NULL_ARGUMENT		`utilityIds` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getMetersByUtilities
Description	Gets the list of `Meters` corresponding to a list of `Utility` objects.
Parameters	`osid.id.IdList`	`utilityIds`	list of utility `Ids`
Return	`osid.metering.MeterList`		list of meters
Errors	NULL_ARGUMENT		`utilityIds` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getUtilityIdsByMeter
Description	Gets the `Utility` `Ids` mapped to a `Meter`.
Parameters	`osid.id.Id`	`meterId`	`Id` of a `Meter`
Return	`osid.id.IdList`		list of utility `Ids`
Errors	NOT_FOUND		`meterId` is not found
	NULL_ARGUMENT		`meterId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getUtilitiesByMeter
Description	Gets the `Utility` objects mapped to a `Meter`.
Parameters	`osid.id.Id`	`meterId`	`Id` of a `Meter`
Return	`osid.metering.UtilityList`		list of utility `Ids`
Errors	NOT_FOUND		`meterId` is not found
	NULL_ARGUMENT		`meterId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.