OSID - osid.voting.VotingSession Service Interface Definition

Interface	osid.voting.VotingSession
Implements	`osid.OsidSession`
Implemented By	`osid.voting.batch.VotingBatchSession`
Used By	`osid.voting.VotingManager`
Used By	`osid.voting.VotingProxyManager`
Description	This session provides methods for voting on a ballot.
Method	getPollsId
Description	Gets the `Polls` `Id` associated with this session.
Return	`osid.id.Id`		the `Polls Id` associated with this session
Compliance	`mandatory`		This method must be implemented.
Method	getPolls
Description	Gets the `Polls` associated with this session.
Return	`osid.voting.Polls`		the polls
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isOpen
Description	Tests if this ballot is open.
Return	`boolean`		`true` if the ballot is open, `false` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canVote
Description	Tests if this user can vote. A return of true does not guarantee successful authorization. A return of false indicates that it is known all 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 relationship operations.
Return	`boolean`		`false` if voting methods are not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	getRace
Description	Gets a race.
Parameters	`osid.id.Id`	`raceId`	`Id` of the `Race`
Return	`osid.voting.Race`		the race
Errors	NOT_FOUND		`raceId` not found
	NULL_ARGUMENT		`raceId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method is must be implemented.
Method	getRacesForBallot
Description	Gets all `Races` on this ballot.
Parameters	`osid.id.Id`	`ballotId`	`Id` of the `Ballot`
Return	`osid.voting.RaceList`		the races
Errors	NOT_FOUND		`ballotId` not found
	NULL_ARGUMENT		`ballotId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getMyUncastRacesForBallot
Description	Gets all `Races` on this ballot for which a vote has not been cast.
Parameters	`osid.id.Id`	`ballotId`	`Id` of the `Ballot`
Return	`osid.voting.RaceList`		the uncast races
Errors	NOT_FOUND		`ballotId` not found
	NULL_ARGUMENT		`ballotId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canVoteWithRecordTypes
Description	Tests if this user can create a single `Vote` using the desired record interface types. While `VotingManager.getVoteRecordTypes()` can be used to examine which records are supported, this method tests which record(s) are required for creating a specific `Vote` . Providing an empty array tests if an `Vote` can be created with no records.
Parameters	`osid.id.Id`	`raceId`	a race `Id`
Parameters	`osid.type.Type[]`	`voteRecordTypes`	array of vote record types
Return	`boolean`		`true` if `Vote` creation using the specified record `Types` is supported, `false` otherwise
Errors	NULL_ARGUMENT		`ballotId` or `voteRecordTypes` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getVotingAllocation
Description	Gets the voter allocation for a race.
Parameters	`osid.id.Id`	`raceId`	`Id` of the `Race`
Return	`osid.voting.VoterAllocation`		the allocation
Errors	NOT_FOUND		`raceId` not found
	NULL_ARGUMENT		`raceId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method is must be implemented.
Method	getVoteForm
Description	Gets a vote form for a race.
Parameters	`osid.id.Id`	`raceId`	`Id` of the `Race`
	`osid.id.Id`	`candidateId`	a candidate
	`osid.type.Type[]`	`voteRecordTypes`	array of vote record types
Return	`osid.voting.VoteForm`		the race
Errors	NOT_FOUND		`raceId` or `candidateId` not found
	NULL_ARGUMENT		`raceId, candidateId` , or `voteRecordTypes` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
	UNSUPPORTED		cannot get form with requested record types
Compliance	`mandatory`		This method is must be implemented.
Method	vote
Description	Votes for a candidate in a race.
Parameters	`osid.voting.VoteForm`	`voteForm`	the vote form
Return	`osid.voting.Vote`		the vote
Errors	ILLEGAL_STATE		`voteForm` already used in a voting transaction
	INVALID_ARGUMENT		form is invalid
	NULL_ARGUMENT		`voteForm` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
	UNSUPPORTED		`voteForm` did not originate from `getVoteForm()`
Compliance	`mandatory`		This method must be implemented.
Method	getMyVotesForBallot
Description	Gets all my `Votes` cast on a ballot.
Parameters	`osid.id.Id`	`ballotId`	a ballot
Return	`osid.voting.VoteList`		the votes
Errors	NOT_FOUND		`ballotId` is not found
	NULL_ARGUMENT		`ballotId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getMyVotesForRace
Description	Gets all my `Votes` cast on this ballot for the given race.
Parameters	`osid.id.Id`	`raceId`	a race
Return	`osid.voting.VoteList`		the votes
Errors	NOT_FOUND		`raceId` is not found
	NULL_ARGUMENT		`raceId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canRevote
Description	Tests if this user can change a vote by deleting a vote and voting again.
Parameters	`osid.id.Id`	`ballotId`	a ballot
Return	`boolean`		`true` if changing a vote is permitted, `false` otherwise
Errors	NOT_FOUND		`ballotId` is not found
	NULL_ARGUMENT		`ballotId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	deleteMyVote
Description	Deletes a vote in a race.
Parameters	`osid.id.Id`	`voteId`	a vote
Errors	ILLEGAL_STATE		`canRevote()` is `false`
	NOT_FOUND		`voteId` is not found
	NULL_ARGUMENT		`voteId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.