OSID - osid.dictionary.DictionaryHierarchySession Service Interface Definition

Interface	osid.dictionary.DictionaryHierarchySession
Implements	`osid.OsidSession`
Description	This session defines methods for traversing a hierarchy of `Dictionary` objects. Each node in the hierarchy is a unique `Dictionary.` The hierarchy may be traversed recursively to establish the tree structure through `getParentDIctionaries()` and `getChildDictionaries().` To relate these `Ids` to another OSID, `getDictionaryNodes()` can be used for retrievals that can be used for bulk lookups in other OSIDs. Any `Dictionary` available in the Dictionary 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 `getParentDictionaries()` or `getChildDictionaries()` 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: dictionary elements may be silently omitted or re-ordered plenary view: provides a complete set or is an error condition
Method	getDictionaryHierarchyId
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	getDictionaryHierarchy
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	canAccessDictionaryHierarchy
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	useComparativeDictionaryView
Description	The returns from the dictionary 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	usePlenaryDictionaryView
Description	A complete view of the `Dictionary` 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	getRootDictionaryIds
Description	Gets the root dictionary `Ids` in this hierarchy.
Return	`osid.id.IdList`		the root dictionary `Ids`
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getRootDictionaries
Description	Gets the root subjects in the dictionary hierarchy. A node with no parents is an orphan. While all dictionary `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.dictionary.DictionaryList`		the root dictionaries
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method is must be implemented.
Method	hasParentDictionaries
Description	Tests if the `Dictionary` has any parents.
Parameters	`osid.id.Id`	`dictionaryId`	a dictionary `Id`
Return	`boolean`		`true` if the dictionary has parents, f `alse` otherwise
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`dictionaryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isParentOfDictionary
Description	Tests if an `Id` is a direct parent of dictionary.
Parameters	`osid.id.Id`	`id`	an `Id`
Parameters	`osid.id.Id`	`dictionaryId`	the `Id` of a dictionary
Return	`boolean`		`true` if this `id` is a parent of `dictionaryId,` f `alse` otherwise
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`id` or `dictionaryId` 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	getParentDictionaryIds
Description	Gets the parent `Ids` of the given dictionary.
Parameters	`osid.id.Id`	`dictionaryId`	a dictionary `Id`
Return	`osid.id.IdList`		the parent Ids of the dictionary
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`dictionaryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getParentDictionaries
Description	Gets the parent dictionaries of the given `id.`
Parameters	`osid.id.Id`	`dictionaryId`	the `Id` of the `Dictionary` to query
Return	`osid.dictionary.DictionaryList`		the parent dictionaries of the `id`
Errors	NOT_FOUND		a `Dictionary` identified by `Id is` not found
	NULL_ARGUMENT		`dictionaryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isAncestorOfDictionary
Description	Tests if an `Id` is an ancestor of a dictionary.
Parameters	`osid.id.Id`	`id`	an `Id`
Parameters	`osid.id.Id`	`dictionaryId`	the `Id` of a dictionary
Return	`boolean`		`tru` e if this `id` is an ancestor of `dictionaryId,` `false` otherwise
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`dictionaryId` 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	hasChildDictionaries
Description	Tests if a dictionary has any children.
Parameters	`osid.id.Id`	`dictionaryId`	a dictionary `Id`
Return	`boolean`		`true` if the `dictionaryId` has children, `false` otherwise
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`dictionaryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isChildOfDictionary
Description	Tests if a dictionary is a direct child of another.
Parameters	`osid.id.Id`	`id`	an `Id`
Parameters	`osid.id.Id`	`dictionaryId`	the `Id` of a dictionary
Return	`boolean`		`true` if the `id` is a child of `dictionaryId,` `false` otherwise
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`id` or `dictionaryId` 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	getChildDictionaryIds
Description	Gets the child `Ids` of the given dictionary.
Parameters	`osid.id.Id`	`dictionaryId`	the `Id` to query
Return	`osid.id.IdList`		the children of the dictionary
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`dictionaryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getChildDictionaries
Description	Gets the child dictionaries of the given `id.`
Parameters	`osid.id.Id`	`dictionaryId`	the `Id` of the `Dictionary` to query
Return	`osid.dictionary.DictionaryList`		the child dictionaries of the `id`
Errors	NOT_FOUND		a `Dictionary` identified by `Id is` not found
	NULL_ARGUMENT		`dictionaryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	isDescendantOfDictionary
Description	Tests if an `Id` is a descendant of a dictionary.
Parameters	`osid.id.Id`	`id`	an `Id`
Parameters	`osid.id.Id`	`dictionaryId`	the `Id` of a dictionary
Return	`boolean`		`true` if the `id` is a descendant of the `dictionaryId,` `false` otherwise
Errors	NOT_FOUND		`dictionaryId` not found
	NULL_ARGUMENT		`id` or `dictionaryId` 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	getDictionaryNodeIds
Description	Gets a portion of the hierarchy for the given dictionary.
Parameters	`osid.id.Id`	`dictionaryId`	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.hierarchy.Node`		a dictionary node
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`dictionaryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getDictionaryNodes
Description	Gets a portion of the hierarchy for the given dictionary.
Parameters	`osid.id.Id`	`dictionaryId`	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.dictionary.DictionaryNode`		a dictionary node
Errors	NOT_FOUND		`dictionaryId` is not found
	NULL_ARGUMENT		`dictionaryId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.