ConnectedSubgraphFinder.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 * Copyright (C) 2005-2006 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************/
 
#ifndef GEOS_PLANARGRAPH_ALGO_CONNECTEDSUBGRAPHFINDER_H
#define GEOS_PLANARGRAPH_ALGO_CONNECTEDSUBGRAPHFINDER_H
 
#include <geos/export.h>
#include <geos/planargraph/PlanarGraph.h> // for inlines
 
#include <stack>
#include <vector>
 
// Forward declarations
namespace geos {
        namespace planargraph { 
                class PlanarGraph;
                class Subgraph;
                class Node;
        }
}
 
namespace geos {
namespace planargraph { // geos::planargraph
namespace algorithm { // geos::planargraph::algorithm

class GEOS_DLL ConnectedSubgraphFinder
{
public:
 
        ConnectedSubgraphFinder(PlanarGraph& newGraph)
                :
                graph(newGraph)
                {}

        void getConnectedSubgraphs(std::vector<Subgraph *>& dest);
 
private:
 
        PlanarGraph& graph;

        Subgraph* findSubgraph(Node* node);
 

        void addReachable(Node* node, Subgraph* subgraph);

        void addEdges(Node* node, std::stack<Node *>& nodeStack,
                        Subgraph* subgraph);
 
    // Declare type as noncopyable
    ConnectedSubgraphFinder(const ConnectedSubgraphFinder& other);
    ConnectedSubgraphFinder& operator=(const ConnectedSubgraphFinder& rhs);
};
 
} // namespace geos::planargraph::algorithm
} // namespace geos::planargraph
} // namespace geos
 
#endif // GEOS_PLANARGRAPH_ALGO_CONNECTEDSUBGRAPHFINDER_H