OSID - osid.voting.VotePollsAssignmentSession Service Interface Definition

Interface	osid.voting.VotePollsAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign `Votes` to `Polls.` A `Vote` may map to multiple `Polls` objects and removing the last reference to a `Vote` is the equivalent of deleting it. Each `Polls` may have its own authorizations governing who is allowed to operate on it. Moving or adding a reference of a `Vote` to another `Polls` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignVotes
Description	Tests if this user can alter vote/polls mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer assignment operations to unauthorized users.
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignVotesToPolls
Description	Tests if this user can alter vote/polls mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer assignment operations to unauthorized users.
Parameters	`osid.id.Id`	`pollsId`	the `Id` of the `Polls`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`pollsId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignablePollsIds
Description	Gets a list of polls including and under the given polls node in which any vote can be assigned.
Parameters	`osid.id.Id`	`pollsId`	the `Id` of the `Polls`
Return	`osid.id.IdList`		list of assignable polls `Ids`
Errors	NULL_ARGUMENT		`pollsId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignablePollsIdsForVote
Description	Gets a list of polls including and under the given polls node in which a specific vote can be assigned.
Parameters	`osid.id.Id`	`pollsId`	the `Id` of the `Polls`
Parameters	`osid.id.Id`	`voteId`	the `Id` of the `Vote`
Return	`osid.id.IdList`		list of assignable polls `Ids`
Errors	NULL_ARGUMENT		`pollsId` or `voteId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignVoteToPolls
Description	Adds an existing `Vote` to a `Polls.`
Parameters	`osid.id.Id`	`voteId`	the `Id` of the `Vote`
Parameters	`osid.id.Id`	`pollsId`	the `Id` of the `Polls`
Errors	ALREADY_EXISTS		`voteId` is already assigned to `pollsId`
	NOT_FOUND		`voteId` or `pollsId` not found
	NULL_ARGUMENT		`voteId` or `pollsId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignVoteFromPolls
Description	Removes a `Vote` from a `Polls.`
Parameters	`osid.id.Id`	`voteId`	the `Id` of the `Vote`
Parameters	`osid.id.Id`	`pollsId`	the `Id` of the `Polls`
Errors	NOT_FOUND		`voteId` or `pollsId` not found or `voteId` not assigned to `pollsId`
	NULL_ARGUMENT		`voteId` or `pollsId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.