OSID - osid.repository.RepositoryHierarchySession Service Interface Definition

Interface	osid.repository.RepositoryHierarchySession
Implements	`osid.OsidSession`
Used By	`osid.repository.RepositoryManager`
Used By	`osid.repository.RepositoryProxyManager`
Description	This session defines methods for traversing a hierarchy of `Repository` objects. Each node in the hierarchy is a unique `Repository`. The hierarchy may be traversed recursively to establish the tree structure through `getParents()` and `getChildren()`. To relate these `Ids` to another OSID, `getAncestors()` and `getDescendants()` can be used for retrievals that can be used for bulk lookups in other OSIDs. Any `Repository` available in the Repository OSID is known to this hierarchy but does not appear in the hierarchy traversal until added as a root node or a child of another node. A user may not be authorized to traverse the entire hierarchy. Parts of the hierarchy may be made invisible through omission from the returns of `getParents()` or `getChildren()` in lieu of a `PERMISSION_DENIED` error that may disrupt the traversal through authorized pathways. This session defines views that offer differing behaviors when retrieving multiple objects. comparative view: repository elements may be silently omitted or re-ordered plenary view: provides a complete set or is an error condition
Method	getRepositoryHierarchyId
Description	Gets the hierarchy `Id` associated with this session.
Return	`osid.id.Id`		the hierarchy `Id` associated with this session
Compliance	`mandatory`		This method must be implemented.
Method	getRepositoryHierarchy
Description	Gets the hierarchy associated with this session.
Return	`osid.hierarchy.Hierarchy`		the hierarchy associated with this session
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canAccessRepositoryHierarchy
Description	Tests if this user can perform hierarchy queries. 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 lookup operations.
Return	`boolean`		`false` if hierarchy traversal methods are not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	useComparativeRepositoryView
Description	The returns from the repository methods may omit or translate elements based on this session, such as authorization, and not result in an error. This view is used when greater interoperability is desired at the expense of precision.
Compliance	`mandatory`		This method is must be implemented.
Method	usePlenaryRepositoryView
Description	A complete view of the `Repository` returns is desired. Methods will return what is requested or result in an error. This view is used when greater precision is desired at the expense of interoperability.
Compliance	`mandatory`		This method is must be implemented.
Method	getRootRepositoryIds
Description	Gets the root repository `Ids` in this hierarchy.
Return	`osid.id.IdList`		the root repository `Ids`
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getRootRepositories
Description	Gets the root repositories in the repository hierarchy. A node with no parents is an orphan. While all repository `Ids` are known to the hierarchy, an orphan does not appear in the hierarchy unless explicitly added as a root node or child of another node.
Return	`osid.repository.RepositoryList`		the root repositories
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method is must be implemented.
Method	hasParentRepositories
Description	Tests if the `Repository` has any parents.
Parameters	`osid.id.Id`	`repositoryId`	a repository `Id`
Return	`boolean`		`true` if the repository has parents, `false` otherwise
Errors	NOT_FOUND		`repositoryId` is not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isParentOfRepository
Description	Tests if an `Id` is a direct parent of a repository.
Parameters	`osid.id.Id`	`id`	an `Id`
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of a repository
Return	`boolean`		`true` if this `id` is a parent of `repositoryId`, `false` otherwise
Errors	NOT_FOUND		`repositoryId` is not found
	NULL_ARGUMENT		`id` or `repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Provider Notes	If `id` not found return `false`.
Method	getParentRepositoryIds
Description	Gets the parent `Ids` of the given repository.
Parameters	`osid.id.Id`	`repositoryId`	a repository `Id`
Return	`osid.id.IdList`		the parent `Ids` of the repository
Errors	NOT_FOUND		`repositoryId` is not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getParentRepositories
Description	Gets the parents of the given repository.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` to query
Return	`osid.repository.RepositoryList`		the parents of the repository
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isAncestorOfRepository
Description	Tests if an `Id` is an ancestor of a repository.
Parameters	`osid.id.Id`	`id`	an `Id`
Parameters	`osid.id.Id`	`repositoryId`	the Id of a repository
Return	`boolean`		`true` if this `id` is an ancestor of `repositoryId`, `false` otherwise
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Provider Notes	If `id` not found return `false`.
Method	hasChildRepositories
Description	Tests if a repository has any children.
Parameters	`osid.id.Id`	`repositoryId`	a repository `Id`
Return	`boolean`		`true` if the `repositoryId` has children, `false` otherwise
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isChildOfRepository
Description	Tests if a node is a direct child of another.
Parameters	`osid.id.Id`	`id`	an `Id`
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of a repository
Return	`boolean`		`true` if the `id` is a child of `repositoryId`, `false` otherwise
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Provider Notes	If `id` not found return `false`.
Method	getChildRepositoryIds
Description	Gets the `Ids` of the children of the given repository.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` to query
Return	`osid.id.IdList`		the children of the repository
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getChildRepositories
Description	Gets the children of the given repository.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` to query
Return	`osid.repository.RepositoryList`		the children of the repository
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isDescendantOfRepository
Description	Tests if an `Id` is a descendant of a repository.
Parameters	`osid.id.Id`	`id`	an `Id`
Parameters	`osid.id.Id`	`repositoryId`	the `Id` of a repository
Return	`boolean`		`true` if the `id` is a descendant of the `repositoryId`, `false` otherwise
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` or `id` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Provider Notes	If `id` is not found return `false`.
Method	getRepositoryNodeIds
Description	Gets a portion of the hierarchy for the given repository.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` to query
	`cardinal`	`ancestorLevels`	the maximum number of ancestor levels to include. A value of 0 returns no parents in the node.
	`cardinal`	`descendantLevels`	the maximum number of descendant levels to include. A value of 0 returns no children in the node.
	`boolean`	`includeSiblings`	`true` to include the siblings of the given node, `false` to omit the siblings
Return	`osid.id.IdList`		the specified repository node
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getRepositoryNodes
Description	Gets a portion of the hierarchy for the given repository.
Parameters	`osid.id.Id`	`repositoryId`	the `Id` to query
	`cardinal`	`ancestorLevels`	the maximum number of ancestor levels to include. A value of 0 returns no parents in the node.
	`cardinal`	`descendantLevels`	the maximum number of descendant levels to include. A value of 0 returns no children in the node.
	`boolean`	`includeSiblings`	`true` to include the siblings of the given node, `false` to omit the siblings
Return	`osid.repository.RepositoryNode`		the specified repository node
Errors	NOT_FOUND		`repositoryId` not found
	NULL_ARGUMENT		`repositoryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.