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)
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
#include <geos/geom/LineString.h>
#include <geos/operation/linemerge/LineMergeGraph.h> // for composition
 
#include <memory>
#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 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;
 
    bool isDirected;
 
    std::vector<std::unique_ptr<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(bool directed = false);
    ~LineMerger();
 
    void add(std::vector<const geom::Geometry*>* geometries);
 
    void add(const geom::Geometry* geometry);
 
    std::vector<std::unique_ptr<geom::LineString>> getMergedLineStrings();
 
    void add(const geom::LineString* lineString);
 
    // Declare type as noncopyable
    LineMerger(const LineMerger& other) = delete;
    LineMerger& operator=(const LineMerger& rhs) = delete;
};
 
} // namespace geos::operation::linemerge
} // namespace geos::operation
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif