OSID - osid.course.ActivityList Service Interface Definition

Interface	osid.course.ActivityList
Implements	`osid.OsidList`
Used By	`osid.course.Activity`
	`osid.course.ActivityCourseCatalogSession`
	`osid.course.ActivityLookupSession`
	`osid.course.ActivityQuerySession`
	`osid.course.ActivitySearchResults`
	`osid.course.ActivityUnravellingSession`
	`osid.course.plan.Lesson`
	`osid.course.plan.LessonConflictSession`
	`osid.course.registration.RegistrationTarget`
Description	Like all `OsidLists` , `ActivityList` provides a means for accessing `Activity` elements sequentially either one at a time or many at a time. Examples: while (al.hasNext()) { Activity activity = al.getNextActivity(); } or while (al.hasNext()) { Activity[] activities = al.getNextActivities(al.available()); }
Method	getNextActivity
Description	Gets the next `Activity` in this list.
Return	`osid.course.Activity`		the next `Activity` in this list. The `hasNext()` method should be used to test that a next `Activity` 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	getNextActivities
Description	Gets the next set of `Activity` elements in this list. The specified amount must be less than or equal to the return from `available()` .
Parameters	`cardinal`	`n`	the number of `Activity` elements requested which must be less than or equal to `available()`
Return	`osid.course.Activity[]`		an array of `Activity` 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.