LineMerger.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 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.
 *
 **********************************************************************
 *
 * Last port: operation/linemerge/LineMerger.java r378 (JTS-1.12)
 *
 **********************************************************************/
 
#ifndef GEOS_OP_LINEMERGE_LINEMERGER_H
#define GEOS_OP_LINEMERGE_LINEMERGER_H
 
#include <geos/export.h>
#include <geos/operation/linemerge/LineMergeGraph.h> // for composition
 
#include <vector>
 
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif
 
// Forward declarations 
namespace geos {
        namespace geom { 
                class LineString;
                class GeometryFactory;
                class Geometry;
        }
        namespace planargraph {
                class Node;
        }
        namespace operation { 
                namespace linemerge { 
                        class EdgeString;
                        class LineMergeDirectedEdge;
                }
        }
}
 
 
namespace geos {
namespace operation { // geos::operation
namespace linemerge { // geos::operation::linemerge

class GEOS_DLL LineMerger {
 
private:
 
        LineMergeGraph graph;
 
        std::vector<geom::LineString*> *mergedLineStrings;
 
        std::vector<EdgeString*> edgeStrings;
 
        const geom::GeometryFactory *factory;
 
        void merge();
 
        void buildEdgeStringsForObviousStartNodes();
 
        void buildEdgeStringsForIsolatedLoops();
 
        void buildEdgeStringsForUnprocessedNodes();
 
        void buildEdgeStringsForNonDegree2Nodes();
 
        void buildEdgeStringsStartingAt(planargraph::Node *node);
 
        EdgeString* buildEdgeStringStartingWith(LineMergeDirectedEdge *start);
 
public:
        LineMerger();
        ~LineMerger();

        void add(std::vector<geom::Geometry*> *geometries);
  
        void add(const geom::Geometry *geometry);

        std::vector<geom::LineString*>* getMergedLineStrings();
 
        void add(const geom::LineString *lineString);
 
};
 
} // namespace geos::operation::linemerge
} // namespace geos::operation
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // GEOS_OP_LINEMERGE_LINEMERGER_H