OSID - osid.rules.check.InstructionList Service Interface Definition

Interface	osid.rules.check.InstructionList
Implements	`osid.OsidList`
Used By	`osid.rules.check.InstructionApplicabilitySession`
	`osid.rules.check.InstructionEngineSession`
	`osid.rules.check.InstructionLookupSession`
	`osid.rules.check.InstructionQuerySession`
	`osid.rules.check.InstructionSearchResults`
Description	Like all `OsidLists`, `InstructionList` provides a means for accessing `Instruction` elements sequentially either one at a time or many at a time. Examples: while (il.hasNext()) { Instruction instruction = il.getNextInstruction(); } or while (il.hasNext()) { Instruction[] instructions = il.getNextInstructions(il.available()); }
Method	getNextInstruction
Description	Gets the next `Instruction` in this list.
Return	`osid.rules.check.Instruction`		the next `Instruction` in this list. The `hasNext()` method should be used to test that a next `Instruction` 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	getNextInstructions
Description	Gets the next set of `Instruction` elements in this list. The specified amount must be less than or equal to the return from `available()`.
Parameters	`cardinal`	`n`	the number of `Instruction` elements requested which must be less than or equal to `available()`
Return	`osid.rules.check.Instruction[]`		an array of `Instruction` 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.