OSID - osid.topology.GraphQuerySession Service Interface Definition

Interface	osid.topology.GraphQuerySession
Implements	`osid.OsidSession`
Implemented By	`osid.topology.GraphSearchSession`
Used By	`osid.topology.TopologyManager`
Used By	`osid.topology.TopologyProxyManager`
Description	This session provides methods for searching among `Graph` objects. The search query is constructed using the `GraphQuery`. Graphs may have a query record indicated by their respective record types. The query record is accessed via the `GraphQuery`.
Method	canSearchGraphs
Description	Tests if this user can perform `Graph` searches. 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	getGraphQuery
Description	Gets a graph query.
Return	`osid.topology.GraphQuery`		the graph query
Compliance	`mandatory`		This method must be implemented.
Method	getGraphsByQuery
Description	Gets a list of `Graphs` matching the given graph query.
Parameters	`osid.topology.GraphQuery`	`graphQuery`	the graph query
Return	`osid.topology.GraphList`		the returned `GraphList`
Errors	NULL_ARGUMENT		`graphQuery` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
	UNSUPPORTED		`graphQuery` is not of this service
Compliance	`mandatory`		This method must be implemented.