OSID - osid.billing.ItemList Service Interface Definition

Interface	osid.billing.ItemList
Implements	`osid.OsidList`
Used By	`osid.billing.ItemBusinessSession`
	`osid.billing.ItemLookupSession`
	`osid.billing.ItemQuerySession`
	`osid.billing.ItemSearchResults`
Description	Like all `OsidLists` , `ItemList` provides a means for accessing `Item` elements sequentially either one at a time or many at a time. Examples: while (il.hasNext()) { Item unit = il.getNextItem(); } or while (il.hasNext()) { Item[] units = il.getNextItems(il.available()); }
Method	getNextItem
Description	Gets the next `Item` in this list.
Return	`osid.billing.Item`		the next `Item` in this list. The `hasNext()` method should be used to test that a next `Item` 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	getNextItems
Description	Gets the next set of `Item` elements in this list. The specified amount must be less than or equal to the return from `available()` .
Parameters	`cardinal`	`n`	the number of `Item` elements requested which must be less than or equal to `available()`
Return	`osid.billing.Item[]`		an array of `Item` 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.