OSID - osid.repository.rules.CompositionEnablerRepositoryAssignmentSession Service Interface Definition

Interface	osid.repository.rules.CompositionEnablerRepositoryAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign `CompositionEnabler` to `Repository` mappings. A `CompositionEnabler` may appear in multiple `Repository` objects and removing the last reference to a `CompositionEnabler` is the equivalent of deleting it. Each `Composition` may have its own authorizations governing who is allowed to operate on it. Adding a reference of a `CompositionEnabler` to another `Repository` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignCompositionEnablers
Description	Tests if this user can alter composition enabler/repository 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 lookup operations to unauthorized users.
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignCompositionEnablersToRepository
Description	Tests if this user can alter composition enabler/repository 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 lookup operations to unauthorized users.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`repositoryId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableRepositoryIds
Description	Gets a list of repositories including and under the given repository node in which any repository enabler can be assigned.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Return	`osid.id.IdList`		list of assignable composition `Ids`
Errors	NULL_ARGUMENT		`repositoryId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableRepositoryIdsForCompositionEnabler
Description	Gets a list of repositories including and under the given repository node in which a specific repository enabler can be assigned.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Parameters	`osid.id.Id`	`compositionEnablerId`	the `Id` of the `CompositionEnabler`
Return	`osid.id.IdList`		list of assignable repository `Ids`
Errors	NULL_ARGUMENT		`repositoryId` or `compositionEnablerId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignCompositionEnablerToRepository
Description	Adds an existing `CompositionEnabler` to a `Repository.`
Parameters	`osid.id.Id`	`compositionEnablerId`	the `Id` of the `CompositionEnabler`
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Errors	ALREADY_EXISTS		`compositionEnablerId` is alraedy assigned to `repositoryId`
	NOT_FOUND		`compositionEnablerId` or `repositoryId` not found
	NULL_ARGUMENT		`compositionEnablerId` or `repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignCompositionEnablerFromRepository
Description	Removes a `CompositionEnabler` from a `Repository.`
Parameters	`osid.id.Id`	`compositionEnablerId`	the `Id` of the `CompositionEnabler`
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Errors	NOT_FOUND		`compositionEnablerId` or `repositoryId` not found or `compositionEnablerId` not assigned to `repositoryId`
	NULL_ARGUMENT		`compositionEnablerId` or `repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	reassignCompositionEnablerToRepository
Description	Moves a `CompositionEnabler` from one `Repository` to another. Mappings to other `Repositories` are unaffected.
Parameters	`osid.id.Id`	`compositionEnablerId`	the `Id` of the `CompositionEnabler`
	`osid.id.Id`	`fromRepositoryId`	the `Id` of the current `Repository`
	`osid.id.Id`	`toRepositoryId`	the `Id` of the destination `Repository`
Errors	NOT_FOUND		`compositionEnablerId, fromRepositoryId,` or `toRepositoryId` not found or `compositionEnablerId` not mapped to `fromRepositoryId`
	NULL_ARGUMENT		`compositionEnablerId, fromRepositoryId,` or `toRepositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.