Connectivity Class Reference
[Algorithms]

Connectivity class. More...

Inheritance diagram for Connectivity:

Inheritance graph
Collaboration diagram for Connectivity:

Collaboration graph

List of all members.

Public Member Functions

virtual ~Connectivity ()
 Destructor.
virtual void AddNodeType (sparksee::gdb::type_t t)
 Allows connectivity through nodes of the given type.
virtual void AddAllNodeTypes ()
 Allows connectivity through all node types of the graph.
virtual void ExcludeNodes (sparksee::gdb::Objects &nodes)
 Set which nodes can't be used.
virtual void ExcludeEdges (sparksee::gdb::Objects &edges)
 Set which edges can't be used.
ConnectedComponentsGetConnectedComponents ()
 Returns the results generated by the execution of the algorithm.
virtual void Run ()=0
 Runs the algorithm in order to find the connected components.
void SetMaterializedAttribute (const std::wstring &attributeName)
 Creates a new common attribute type for all node types in the graph in order to store, persistently, the results related to the connected components found while executing this algorithm.

Protected Types

typedef std::map
< sparksee::gdb::type_t,
sparksee::gdb::EdgesDirection
EdgeTypes_t
 A type definition to store allowed edge types.
typedef std::vector
< sparksee::gdb::type_t
NodeTypes_t
 A type definition to store allowed node types.

Protected Member Functions

 Connectivity (sparksee::gdb::Session &s)
 Creates a new instance of Connectivity.
void AddEdgeType (sparksee::gdb::type_t t, sparksee::gdb::EdgesDirection d)
 Allows connectivity through edges of the given type.
void AddAllEdgeTypes (sparksee::gdb::EdgesDirection d)
 Allows connectivity through all edge types of the graph.
void AssertAddedEdges ()
 Check that edges had been added.
void AssertAddedNodes ()
 Check that nodes had been added.
void AssertNotComputed ()
 Check that the connectivity had not been calculated yet.
void SetConnectedComponent (sparksee::gdb::oid_t idNode)
 Assigns the current component to the given node.
void SetNodesNotVisited ()
 Set all the selected nodes in nodesNotVisited.
void AssertNotComponentAttribute (const std::wstring &attributeName)
 Check that the given attribute name is not already in use.
void AssertComputed ()
 Check that the connectivity had been calculated.
void AssertEdgeType (sparksee::gdb::type_t edgetype)
 Check that the given edge type is valid.
void AssertNodeType (sparksee::gdb::type_t nodetype)
 Check that the given node type is valid.
void CreateGlobalPersistentAttribute (const std::wstring &attributeName)
 Set a new persistent global attribute to store the connectivity information.
void CreateGlobalTransientAttribute ()
 Set a new temporary global attribute to store the connectivity information.
void RemoveGlobalAttribute ()
 Removes the global attribute where the connectivity information is stored.
sparksee::gdb::bool_t IsNodeTypeAllowed (sparksee::gdb::oid_t nodeId)
 Check if the given node has an allowed type.
sparksee::gdb::bool_t IsNodeExcluded (sparksee::gdb::oid_t node)
 Check if the given node is forbidden.
sparksee::gdb::bool_t IsEdgeExcluded (sparksee::gdb::oid_t edge)
 Check if the given edge is forbidden.

Protected Attributes

sparksee::gdb::Session * sess
 Session.
sparksee::gdb::Graph * graph
 Graph.
EdgeTypes_t edgeTypes
 Allowed edge types.
std::vector
< sparksee::gdb::type_t
nodeTypes
 Allowed node types.
sparksee::gdb::attr_t attrComponent
 common attribute where the connected component information is stored.
std::wstring attrComponentName
 name of the common attribute where the connected component information is stored.
sparksee::gdb::int64_t actualComponent
 Current component identifier.
sparksee::gdb::Objects * nodesNotVisited
 Identifiers of the nodes not visited.
sparksee::gdb::bool_t matResults
 Materialized results.
sparksee::gdb::bool_t computed
 True if the connectivity has been calculated.
sparksee::gdb::Objects * excludedNodes
 The set of excluded nodes.
sparksee::gdb::Objects * excludedEdges
 The set of excluded edges.
ConnectedComponentsccs
 The calculated connectivity information.


Detailed Description

Connectivity class.

Any class implementing this abstract class can be used to solve a problem related to graph connectivity as finding the strongly connected components or finding the weakly connected components.

Check out the 'Algorithms' section in the SPARKSEE User Manual for more details on this.

Author:
Sparsity Technologies http://www.sparsity-technologies.com

Constructor & Destructor Documentation

Connectivity::Connectivity ( sparksee::gdb::Session &  s  )  [protected]

Creates a new instance of Connectivity.

Parameters:
s [in] Session to get the graph from and calculate the connectivity


Member Function Documentation

virtual void Connectivity::ExcludeNodes ( sparksee::gdb::Objects &  nodes  )  [virtual]

Set which nodes can't be used.

This will replace any previously specified set of excluded nodes. Should only be used to exclude the usage of specific nodes from allowed node types because it's less efficient than not allowing a node type.

Parameters:
nodes [in] A set of node identifiers that must be kept intact until the destruction of the class.

virtual void Connectivity::ExcludeEdges ( sparksee::gdb::Objects &  edges  )  [virtual]

Set which edges can't be used.

This will replace any previously specified set of excluded edges. Should only be used to exclude the usage of specific edges from allowed edge types because it's less efficient than not allowing an edge type.

Parameters:
edges [in] A set of edge identifiers that must be kept intact until the destruction of the class.

ConnectedComponents* Connectivity::GetConnectedComponents (  ) 

Returns the results generated by the execution of the algorithm.

These results contain information related to the connected components found as the number of different components, the set of nodes contained in each component or many other data.

Returns:
Returns an instance of the class ConnectedComponents which contain information related to the connected components found.

virtual void Connectivity::Run (  )  [pure virtual]

Runs the algorithm in order to find the connected components.

This method can be called only once.

Implemented in StrongConnectivityGabow, and WeakConnectivityDFS.

void Connectivity::SetMaterializedAttribute ( const std::wstring &  attributeName  ) 

Creates a new common attribute type for all node types in the graph in order to store, persistently, the results related to the connected components found while executing this algorithm.

Whenever the user wants to retrieve the results, even when the graph has been closed and opened again, it is only necessary to create a new instance of the class ConnectedComponents indicating the graph and the name of the common attribute type which stores the results. This instance will have all the information related to the connected components found in the moment of the execution of the algorithm that stored this data.

It is possible to run the algorithm without specifying this parameter in order to avoid materializing the results of the execution.

Parameters:
attributeName [in] The name of the common attribute type for all node types in the graph which will store persistently the results generated by the execution of the algorithm.

void Connectivity::AddEdgeType ( sparksee::gdb::type_t  t,
sparksee::gdb::EdgesDirection  d 
) [protected]

Allows connectivity through edges of the given type.

Parameters:
t [in] Edge type.
d [in] Edge direction.

Reimplemented in StrongConnectivity.

void Connectivity::AddAllEdgeTypes ( sparksee::gdb::EdgesDirection  d  )  [protected]

Allows connectivity through all edge types of the graph.

Parameters:
d [in] Edge direction.

Reimplemented in StrongConnectivity.

void Connectivity::SetNodesNotVisited (  )  [protected]

Set all the selected nodes in nodesNotVisited.

That's all the nodes of the allowed node types but not the excluded ones.


The documentation for this class was generated from the following file:

Generated on Fri Sep 12 13:36:25 2014 for Sparksee by  doxygen 1.5.6