OSID - osid.metering.ReadingList Service Interface Definition

Interface	osid.metering.ReadingList
Implements	`osid.OsidList`
Used By	`osid.metering.MeterReadingSession`
Description	Like all `OsidLists`, `ReadingList` provides a means for accessing `Reading` elements sequentially either one at a time or many at a time. Examples: while (rl.hasNext()) { Reading reading = rl.getNextReading(); } or while (rl.hasNext()) { Reading[] readings = rl.getNextReadings(rl.available()); }
Method	getNextReading
Description	Gets the next `Reading` in this list.
Return	`osid.metering.Reading`		the next `Reading` in this list. The `hasNext()` method should be used to test that a next `Reading` 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	getNextReadings
Description	Gets the next set of `Reading` elements in this list. The specified amount must be less than or equal to the return from `available()`.
Parameters	`cardinal`	`n`	the number of `Reading` elements requested which must be less than or equal to `available()`
Return	`osid.metering.Reading[]`		an array of `Reading` 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.