OSID - osid.repository.CompositionRepositoryAssignmentSession Service Interface Definition

Interface	osid.repository.CompositionRepositoryAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign `Compositions` to `Repository` objects. A `Composition` may be associated with multiple `Repository` objects. Removing the last reference to a `Composition` is the equivalent of deleting it. Each `Repository` may have its own authorizations governing who is allowed to operate on it. Moving or adding a reference of a `Composition` to another `Repository` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignCompositions
Description	Tests if this user can alter composition/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 assignment operations to unauthorized users.
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignCompositionsToRepository
Description	Tests if this user can alter composition/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 assignment 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 composition can be assigned.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Return	`osid.id.IdList`		list of assignable repository `Ids`
Errors	NULL_ARGUMENT		`repositoryId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableRepositoryIdsForComposition
Description	Gets a list of repositories including and under the given repository node in which a specific composition can be assigned.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Parameters	`osid.id.Id`	`compositionId`	the `Id` of the `Composition`
Return	`osid.id.IdList`		list of assignable repository `Ids`
Errors	NULL_ARGUMENT		`repositoryId` or `compositionId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignCompositionToRepository
Description	Adds an existing `Composition` to a `Repository.`
Parameters	`osid.id.Id`	`compositionId`	the `Id` of the `Composition`
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Errors	ALREADY_EXISTS		`compositionId` already assigned to `repositoryId`
	NOT_FOUND		`compositionId` or `repositoryId` not found
	NULL_ARGUMENT		`compositionId` or `repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignCompositionFromRepository
Description	Removes `Composition` from a `Repository.`
Parameters	`osid.id.Id`	`compositionId`	the `Id` of the `Composition`
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of the `Repository`
Errors	NOT_FOUND		`compositionId` or `repositoryId` not found or `compositionId` not assigned to `repositoryId`
	NULL_ARGUMENT		`compositionId` or `repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.