OSID - osid.metering.UtilityQuerySession Service Interface Definition

Interface	osid.metering.UtilityQuerySession
Implements	`osid.OsidSession`
Implemented By	`osid.metering.UtilitySearchSession`
Used By	`osid.metering.MeteringManager`
Used By	`osid.metering.MeteringProxyManager`
Description	This session provides methods for searching `Utility` objects. The search query is constructed using the `UtilityQuery`. The utility record `Type` also specifies the record for the utility query. Utilities may have a query record indicated by their respective record types. The query record is accessed via the `UtilityQuery`. The returns in this session may not be cast directly to these interfaces.
Method	canSearchUtilities
Description	Tests if this user can perform `Utility` searches. A return of true does not guarantee successful authorization. A return of false indicates that it is known all 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 search operations to unauthorized users.
Return	`boolean`		`false` if search methods are not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	getUtilityQuery
Description	Gets a utility query.
Return	`osid.metering.UtilityQuery`		the utility query
Compliance	`mandatory`		This method must be implemented.
Method	getUtilitiesByQuery
Description	Gets a list of `Utilities` matching the given utility query.
Parameters	`osid.metering.UtilityQuery`	`utilityQuery`	the utility query
Return	`osid.metering.UtilityList`		the returned `UtilityList`
Errors	NULL_ARGUMENT		`utilityQuery` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
	UNSUPPORTED		`utilityQuery` is not of this service
Compliance	`mandatory`		This method must be implemented.