ConnectedSubgraphFinder.h

00001 /**********************************************************************
00002  * $Id: ConnectedSubgraphFinder.h 1820 2006-09-06 16:54:23Z mloskot $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00008  * Copyright (C) 2005-2006 Refractions Research Inc.
00009  *
00010  * This is free software; you can redistribute and/or modify it under
00011  * the terms of the GNU Lesser General Public Licence as published
00012  * by the Free Software Foundation. 
00013  * See the COPYING file for more information.
00014  *
00015  **********************************************************************/
00016 
00017 #ifndef GEOS_PLANARGRAPH_ALGO_CONNECTEDSUBGRAPHFINDER_H
00018 #define GEOS_PLANARGRAPH_ALGO_CONNECTEDSUBGRAPHFINDER_H
00019 
00020 #include <geos/planargraph/PlanarGraph.h> // for inlines
00021 
00022 #include <stack>
00023 #include <vector>
00024 
00025 // Forward declarations
00026 namespace geos {
00027         namespace planargraph { 
00028                 class PlanarGraph;
00029                 class Subgraph;
00030                 class Node;
00031         }
00032 }
00033 
00034 namespace geos {
00035 namespace planargraph { // geos::planargraph
00036 namespace algorithm { // geos::planargraph::algorithm
00037 
00043 class ConnectedSubgraphFinder
00044 {
00045 private:
00046         PlanarGraph& graph;
00047 
00049         Subgraph* findSubgraph(Node* node);
00050 
00051 
00058         void addReachable(Node* node, Subgraph* subgraph);
00059 
00065         void addEdges(Node* node, std::stack<Node *>& nodeStack,
00066                         Subgraph* subgraph);
00067 
00068 public:
00069 
00070         ConnectedSubgraphFinder(PlanarGraph& newGraph)
00071                 :
00072                 graph(newGraph)
00073                 {}
00074 
00083         void getConnectedSubgraphs(std::vector<Subgraph *>& dest);
00084 
00085 };
00086 
00087 } // namespace geos::planargraph::algorithm
00088 } // namespace geos::planargraph
00089 } // namespace geos
00090 
00091 #endif // GEOS_PLANARGRAPH_ALGO_CONNECTEDSUBGRAPHFINDER_H
00092 

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