OSID - osid.hold.BlockLookupSession Service Interface Definition

Interface	osid.hold.BlockLookupSession
Implements	`osid.OsidSession`
Used By	`osid.hold.HoldManager`
Used By	`osid.hold.HoldProxyManager`
Description	This session provides methods for retrieving `Block` objects. This session defines views that offer differing behaviors when retrieving multiple objects. comparative view: elements may be silently omitted or re-ordered plenary view: provides a complete set or is an error condition isolated oubliette view: All block methods in this session operate, retrieve and pertain to blocks defined explicitly in the current oubliette. Using an isolated view is useful for managing `Blocks` with the `BlockAdminSession`. federated oubliette view: All block methods in this session operate, retrieve and pertain to all blocks defined in this oubliette and any other blocks implicitly available in this oubliette through oubliette inheritence. Generally, the comparative view should be used for most applications as it permits operation even if there is data that cannot be accessed. The methods `useFederatedOublietteView()` and `useIsolatedOublietteView()` behave as a radio group and one should be selected before invoking any lookup methods.
Method	getOublietteId
Description	Gets the `Oubliette` `Id` associated with this session.
Return	`osid.id.Id`		the `Oubliette Id` associated with this session
Compliance	`mandatory`		This method must be implemented.
Method	getOubliette
Description	Gets the `Oubliette` associated with this session.
Return	`osid.hold.Oubliette`		the oubliette
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canLookupBlocks
Description	Tests if this user can perform `Block` lookups. 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 to unauthorized users.
Return	`boolean`		`false` if lookup methods are not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	useComparativeBlockView
Description	The returns from the lookup 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	usePlenaryBlockView
Description	A complete view of the `Block` 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	useFederatedOublietteView
Description	Federates the view for methods in this session. A federated view will include blocks in oubliettes which are children of this oubliette in the oubliette hierarchy.
Compliance	`mandatory`		This method is must be implemented.
Method	useIsolatedOublietteView
Description	Isolates the view for methods in this session. An isolated view restricts lookups to this oubliette only.
Compliance	`mandatory`		This method is must be implemented.
Method	getBlock
Description	Gets the `Block` specified by its `Id`. In plenary mode, the exact `Id` is found or a `NOT_FOUND` results. Otherwise, the returned `Block` may have a different `Id` than requested, such as the case where a duplicate `Id` was assigned to a `Block` and retained for compatibility.
Parameters	`osid.id.Id`	`blockId`	`Id` of the `Block`
Return	`osid.hold.Block`		the block
Errors	NOT_FOUND		`blockId` not found
	NULL_ARGUMENT		`blockId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method is must be implemented.
Method	getBlocksByIds
Description	Gets a `BlockList` corresponding to the given `IdList`. In plenary mode, the returned list contains all of the blocks specified in the `Id` list, in the order of the list, including duplicates, or an error results if an `Id` in the supplied list is not found or inaccessible. Otherwise, inaccessible `Blocks` may be omitted from the list and may present the elements in any order including returning a unique set.
Parameters	`osid.id.IdList`	`blockIds`	the list of `Ids` to retrieve
Return	`osid.hold.BlockList`		the returned `Block` list
Errors	NOT_FOUND		an `Id was` not found
	NULL_ARGUMENT		`blockIds` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getBlocksByGenusType
Description	Gets a `BlockList` corresponding to the given block genus `Type` which does not include blocks of genus types derived from the specified `Type`. In plenary mode, the returned list contains all known blocks or an error results. Otherwise, the returned list may contain only those blocks that are accessible through this session.
Parameters	`osid.type.Type`	`blockGenusType`	a block genus type
Return	`osid.hold.BlockList`		the returned `Block` list
Errors	NULL_ARGUMENT		`blockGenusType` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getBlocksByParentGenusType
Description	Gets a `BlockList` corresponding to the given block genus `Type` and include any additional blocks with genus types derived from the specified `Type`. In plenary mode, the returned list contains all known blocks or an error results. Otherwise, the returned list may contain only those blocks that are accessible through this session.
Parameters	`osid.type.Type`	`blockGenusType`	a block genus type
Return	`osid.hold.BlockList`		the returned `Block` list
Errors	NULL_ARGUMENT		`blockGenusType` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getBlocksByRecordType
Description	Gets a `BlockList` containing the given block record `Type`. In plenary mode, the returned list contains all known blocks or an error results. Otherwise, the returned list may contain only those blocks that are accessible through this session.
Parameters	`osid.type.Type`	`blockRecordType`	a block record type
Return	`osid.hold.BlockList`		the returned `Block` list
Errors	NULL_ARGUMENT		`blockRecordType` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getBlocksForIssue
Description	Gets a `BlockList` mapped to the given `Issue` In plenary mode, the returned list contains all known blocks or an error results. Otherwise, the returned list may contain only those blocks that are accessible through this session.
Parameters	`osid.id.Id`	`issueId`	an issue `Id`
Return	`osid.hold.BlockList`		the returned `Block` list
Errors	NULL_ARGUMENT		`issueId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	getBlocks
Description	Gets all `Blocks`. In plenary mode, the returned list contains all known blocks or an error results. Otherwise, the returned list may contain only those blocks that are accessible through this session.
Return	`osid.hold.BlockList`		a list of `Blocks`
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.