OSID - osid.acknowledgement.BillingQuerySession Service Interface Definition

Interface	osid.acknowledgement.BillingQuerySession
Implements	`osid.OsidSession`
Description	This session provides methods for querying `Billing` objects. The search query is constructed using the `BillingQuery.` Billings may have a query record indicated by their respective record types. The query record is accessed via the `BillingQuery.` The returns in this session may not be cast directly to these interfaces.
Method	canSearchBillings
Description	Tests if this user can perform `Billing` 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	getBillingQuery
Description	Gets a billing query.
Return	`osid.acknowledgement.BillingQuery`		the billing query
Compliance	`mandatory`		This method must be implemented.
Method	getBillingsByQuery
Description	Gets a list of `Billings` matching the given search.
Parameters	`osid.acknowledgement.BillingQuery`	`billingQuery`	the billing query
Return	`osid.acknowledgement.BillingList`		the returned `BillingList`
Errors	NULL_ARGUMENT		`billingQuery` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
	UNSUPPORTED		`billingQuery` is not of this service
Compliance	`mandatory`		This method must be implemented.