org.osid.topology

Interface NodeGraphAssignmentSession

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable, OsidSession

public interface NodeGraphAssignmentSession
extends OsidSession

This session provides methods to re-assign Nodes to Graph objects A Node may appear in multiple Graph objects and removing the last reference to a Node is the equivalent of deleting it. Each Graph may have its own authorizations governing who is allowed to operate on it.

Adding a reference of a Node to another Graph is not a copy operation (eg: does not change its Id ).

Method Summary

Methods

Modifier and Type	Method and Description
void	assignNodeToGraph(Id nodeId, Id graphId) Adds an existing Node to a Graph.
boolean	canAssignNodes() Tests if this user can alter node/graph mappings.
boolean	canAssignNodesToGraph(Id graphId) Tests if this user can alter node/graph mappings.
IdList	getAssignableGraphIds(Id graphId) Gets a list of graphs including and under the given graph node in which any node can be assigned.
IdList	getAssignableGraphIdsForNode(Id graphId, Id nodeId) Gets a list of graphs including and under the given graph node in which a specific node can be assigned.
void	reassignNodeToGraph(Id nodeId, Id fromGraphId, Id toGraphId) Moves a Node from one Graph to another.
void	unassignNodeFromGraph(Id nodeId, Id graphId) Removes a Node from a Graph.

Methods inherited from interface org.osid.OsidSession

getAuthenticatedAgent, getAuthenticatedAgentId, getClockRate, getDate, getEffectiveAgent, getEffectiveAgentId, getFormatType, getLocale, isAuthenticated, startTransaction, supportsTransactions

Methods inherited from interface org.osid.binding.java.OsidSession

close

Methods inherited from interface java.io.Closeable

close

Method Detail

canAssignNodes

boolean canAssignNodes()

Tests if this user can alter node/graph mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping 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 assignment operations to unauthorized users.

Returns:

false if mapping is not authorized, true otherwise

Compliance:

mandatory - This method must be implemented.

canAssignNodesToGraph

boolean canAssignNodesToGraph(Id graphId)

Tests if this user can alter node/graph mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping 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 assignment operations to unauthorized users.

Parameters:

graphId - the Id of the Graph

Returns:

false if mapping is not authorized, true otherwise

Throws:

NullArgumentException - graphId is null

Compliance:

mandatory - This method must be implemented.

getAssignableGraphIds

IdList getAssignableGraphIds(Id graphId)
                             throws OperationFailedException

Gets a list of graphs including and under the given graph node in which any node can be assigned.

Parameters:

graphId - the Id of the Graph

Returns:

list of assignable graph Ids

Throws:

NullArgumentException - graphId is null

OperationFailedException - unable to complete request

Compliance:

mandatory - This method must be implemented.

getAssignableGraphIdsForNode

IdList getAssignableGraphIdsForNode(Id graphId,
                                  Id nodeId)
                                    throws OperationFailedException

Gets a list of graphs including and under the given graph node in which a specific node can be assigned.

Parameters:

graphId - the Id of the Graph

nodeId - the Id of the Node

Returns:

list of assignable graph Ids

Throws:

NullArgumentException - graphId or nodeId is null

OperationFailedException - unable to complete request

Compliance:

mandatory - This method must be implemented.

assignNodeToGraph

void assignNodeToGraph(Id nodeId,
                     Id graphId)
                       throws AlreadyExistsException,
                              NotFoundException,
                              OperationFailedException,
                              PermissionDeniedException

Adds an existing Node to a Graph.

Parameters:

nodeId - the Id of the Node

graphId - the Id of the Graph

Throws:

AlreadyExistsException - nodeId is already assigned to graphId

NotFoundException - nodeId or graphId not found

NullArgumentException - nodeId or graphId is null

OperationFailedException - unable to complete request

PermissionDeniedException - authorization failure

Compliance:

mandatory - This method must be implemented.

unassignNodeFromGraph

void unassignNodeFromGraph(Id nodeId,
                         Id graphId)
                           throws NotFoundException,
                                  OperationFailedException,
                                  PermissionDeniedException

Removes a Node from a Graph.

Parameters:

nodeId - the Id of the Node

graphId - the Id of the Graph

Throws:

NotFoundException - nodeId or graphId not found or nodeId not assigned to graphId

NullArgumentException - nodeId or graphId is null

OperationFailedException - unable to complete request

PermissionDeniedException - authorization failure

Compliance:

mandatory - This method must be implemented.

reassignNodeToGraph

void reassignNodeToGraph(Id nodeId,
                       Id fromGraphId,
                       Id toGraphId)
                         throws NotFoundException,
                                OperationFailedException,
                                PermissionDeniedException

Moves a Node from one Graph to another. Mappings to other Graphs are unaffected.

Parameters:

nodeId - the Id of the Node

fromGraphId - the Id of the current Graph

toGraphId - the Id of the destination Graph

Throws:

NotFoundException - nodeId, fromGraphId, or toGraphId not found or nodeId not mapped to fromGraphId

NullArgumentException - nodeId, fromGraphId, or toGraphId is null

OperationFailedException - unable to complete request

PermissionDeniedException - authorization failure

Compliance:

mandatory - This method must be implemented.