OSID - osid.course.plan.LessonList Service Interface Definition

Interface	osid.course.plan.LessonList
Implements	`osid.OsidList`
Used By	`osid.course.plan.LessonConflictSession`
	`osid.course.plan.LessonCourseCatalogSession`
	`osid.course.plan.LessonLookupSession`
	`osid.course.plan.LessonQuerySession`
	`osid.course.plan.LessonSearchResults`
Description	Like all `OsidLists`, `LessonList` provides a means for accessing `Lesson` elements sequentially either one at a time or many at a time. Examples: while (ll.hasNext()) { Lesson lesson = ll.getNextLesson(); } or while (ll.hasNext()) { Lesson[] lessons = ll.getNextLessons(ll.available()); }
Method	getNextLesson
Description	Gets the next `Lesson` in this list.
Return	`osid.course.plan.Lesson`		the next `Lesson` in this list. The `hasNext()` method should be used to test that a next `Lesson` 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	getNextLessons
Description	Gets the next set of `Lesson` elements in this list. The specified amount must be less than or equal to the return from available().
Parameters	`cardinal`	`n`	the number of `Lesson` elements requested which must be less than or equal to `available()`
Return	`osid.course.plan.Lesson[]`		an array of `Lesson` 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.