OSID - osid.topology.EdgeQuerySession Service Interface Definition

Interface	osid.topology.EdgeQuerySession
Implements	`osid.OsidSession`
Description	This session provides methods for searching among `Edge` objects. The search query is constructed using the `EdgeQuery.` This session defines views that offer differing behaviors for searching. federated graph view: searches include edges in graphs of which this graph is an ancestor in the graph hierarchy isolated graph view: searches are restricted to edges in this graph Edges may have a query record indicated by their respective record types. The query record is accessed via the `EdgeQuery.`
Method	getGraphId
Description	Gets the `Graph` `Id` associated with this session.
Return	`osid.id.Id`		the `Graph Id` associated with this session
Compliance	`mandatory`		This method must be implemented.
Method	getGraph
Description	Gets the `Graph` associated with this session.
Return	`osid.topology.Graph`		the graph
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canSearchEdges
Description	Tests if this user can perform `Edge` 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 not offer lookup operations to unauthorized users.
Return	`boolean`		`false` if search methods are not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	useFederatedGraphView
Description	Federates the view for methods in this session. A federated view will include edges in graphs which are children of this graph in the graph hierarchy.
Compliance	`mandatory`		This method is must be implemented.
Method	useIsolatedGraphView
Description	Isolates the view for methods in this session. An isolated view restricts lookups to this graph only.
Compliance	`mandatory`		This method is must be implemented.
Method	getEdgeQuery
Description	Gets an edge query.
Return	`osid.topology.EdgeQuery`		the edge query
Compliance	`mandatory`		This method must be implemented.
Method	getEdgesByQuery
Description	Gets a list of `Edges` matching the given edge query.
Parameters	`osid.topology.EdgeQuery`	`edgeQuery`	the edge query
Return	`osid.topology.EdgeList`		the returned `EdgeList`
Errors	NULL_ARGUMENT		`edgeQuery` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
	UNSUPPORTED		`edgeQuery` is not of this service
Compliance	`mandatory`		This method must be implemented.