OSID - osid.offering.CanonicalUnitList Service Interface Definition

Interface	osid.offering.CanonicalUnitList
Implements	`osid.OsidList`
Used By	`osid.offering.CanonicalUnitCatalogueSession`
	`osid.offering.CanonicalUnitLookupSession`
	`osid.offering.CanonicalUnitQuerySession`
	`osid.offering.CanonicalUnitSearchResults`
	`osid.offering.rules.CanonicalUnitEnablerRuleLookupSession`
	`osid.offering.rules.CanonicalUnitProcessorRuleLookupSession`
	`osid.offering.rules.OfferingConstrainerRuleLookupSession`
Description	Like all `OsidLists` , `CanonicalUnitList` provides a means for accessing `CanonicalUnit` elements sequentially either one at a time or many at a time. Examples: while (cul.hasNext()) { CanonicalUnit canonical = cul.getNextCanonicalUnit(); } or while (cul.hasNext()) { CanonicalUnit[] canonicals = cul.getNextCanonicalUnits(cul.available()); }
Method	getNextCanonicalUnit
Description	Gets the next `CanonicalUnit` in this list.
Return	`osid.offering.CanonicalUnit`		the next `CanonicalUnit` in this list. The `hasNext()` method should be used to test that a next `CanonicalUnit` is available before calling this method.
Errors	ILLEGAL_STATE		no more elements available in this list
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getNextCanonicalUnits
Description	Gets the next set of `CanonicalUnit` elements in this list. The specified amount must be less than or equal to the return from `available()` .
Parameters	`cardinal`	`n`	the number of `CanonicalUnit` elements requested which must be less than or equal to `available()`
Return	`osid.offering.CanonicalUnit[]`		an array of `CanonicalUnit` elements. The length of the array is less than or equal to the number specified.
Errors	ILLEGAL_STATE		no more elements available in this list
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.