OSID - osid.sequencing.ElementLookupSession Service Interface Definition

Interface	osid.sequencing.ElementLookupSession
Implements	`osid.OsidSession`
Used By	`osid.sequencing.SequencingManager`
Used By	`osid.sequencing.SequencingProxyManager`
Description	This session provides methods to get the sequence of elements in a `Chain`.
Method	getAntimatroidId
Description	Gets the `Antimatroid` `Id` associated with this session.
Return	`osid.id.Id`		the `Antimatroid Id` associated with this session
Compliance	`mandatory`		This method must be implemented.
Method	getAntimatroid
Description	Gets the `Antimatroid` associated with this session.
Return	`osid.sequencing.Antimatroid`		the antimatroid
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canLookupElements
Description	Tests if this user can lookup eleemnts to a chain. A return of true does not guarantee successful authorization. A return of false indicates that it is known performing any update will result in a `PERMISSION_DENIED`. This is intended as a hint to an application that may opt not to offer these operations to an unauthorized user.
Return	`boolean`		`false` if looking up elements is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	getElements
Description	Gets the ordered list of elements from a `Chain`.
Parameters	`osid.id.Id`	`chainId`	the `Id` of the chain
Errors	NOT_FOUND		`chainId` not found
	NULL_ARGUMENT		`chainId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.