OSID - osid.process.StateList Service Interface Definition

Interface	osid.process.StateList
Implements	`osid.OsidList`
Used By	`osid.control.Controller`
	`osid.mapping.path.Signal`
	`osid.process.StateAssignmentSession`
	`osid.process.StateLookupSession`
	`osid.process.StateQuerySession`
	`osid.process.StateSearchResults`
	`osid.process.StateSession`
	`osid.workflow.Step`
Description	Like all `OsidLists`, `StateList` provides a means for accessing `State` elements sequentially either one at a time or many at a time. Examples: while (sl.hasNext()) { State state = sl.getNextState(); } or while (sl.hasNext()) { State[] states = sl.getNextStates(sl.available()); }
Method	getNextState
Description	Gets the next `State` in this list.
Return	`osid.process.State`		the next `State` in this list. The `hasNext()` method should be used to test that a next `State` 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	getNextStates
Description	Gets the next set of `States` in this list which must be less than or equal to the return from `available()`.
Parameters	`cardinal`	`n`	the number of `State` elements requested which must be less than or equal to `available()`
Return	`osid.process.State[]`		an array of `State` 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.