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# ConnectedSubgraphFinder.h

    00001 /**********************************************************************
    00002  * $Id: ConnectedSubgraphFinder.h 2783 2009-12-03 19:51:16Z 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/export.h>
    00021 #include <geos/planargraph/PlanarGraph.h> // for inlines
    00022
    00023 #include <stack>
    00024 #include <vector>
    00025
    00026 // Forward declarations
    00027 namespace geos {
    00028         namespace planargraph {
    00029                 class PlanarGraph;
    00030                 class Subgraph;
    00031                 class Node;
    00032         }
    00033 }
    00034
    00035 namespace geos {
    00036 namespace planargraph { // geos::planargraph
    00037 namespace algorithm { // geos::planargraph::algorithm
    00038
    00044 class GEOS_DLL ConnectedSubgraphFinder
    00045 {
    00046 public:
    00047
    00048         ConnectedSubgraphFinder(PlanarGraph& newGraph)
    00049                 :
    00050                 graph(newGraph)
    00051                 {}
    00052
    00061         void getConnectedSubgraphs(std::vector<Subgraph *>& dest);
    00062
    00063 private:
    00064
    00065         PlanarGraph& graph;
    00066
    00068         Subgraph* findSubgraph(Node* node);
    00069
    00070
    00077         void addReachable(Node* node, Subgraph* subgraph);
    00078
    00084         void addEdges(Node* node, std::stack<Node *>& nodeStack,
    00085                         Subgraph* subgraph);
    00086
    00087     // Declare type as noncopyable
    00088     ConnectedSubgraphFinder(const ConnectedSubgraphFinder& other);
    00089     ConnectedSubgraphFinder& operator=(const ConnectedSubgraphFinder& rhs);
    00090 };
    00091
    00092 } // namespace geos::planargraph::algorithm
    00093 } // namespace geos::planargraph
    00094 } // namespace geos
    00095
    00096 #endif // GEOS_PLANARGRAPH_ALGO_CONNECTEDSUBGRAPHFINDER_H
    00097