SegmentNodeList.h

/**********************************************************************
 * $Id: SegmentNodeList.h 2556 2009-06-06 22:22:28Z strk $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * 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: noding/SegmentNodeList.java rev. 1.8 (JTS-1.10)
 *
 **********************************************************************/

#ifndef GEOS_NODING_SEGMENTNODELIST_H
#define GEOS_NODING_SEGMENTNODELIST_H

#include <geos/export.h>

#include <geos/inline.h>

#include <cassert>
#include <iostream>
#include <vector>
#include <set>

#include <geos/noding/SegmentNode.h> // for composition

// Forward declarations
namespace geos {
        namespace geom {
                class CoordinateSequence;
        }
        namespace noding {
                class SegmentString;
                class NodedSegmentString;
        }
}

namespace geos {
namespace noding { // geos::noding

class GEOS_DLL SegmentNodeList {
private:
        std::set<SegmentNode*,SegmentNodeLT> nodeMap;

        // the parent edge
        const NodedSegmentString& edge; 

        // This vector is here to keep track of created splitEdges
        std::vector<SegmentString*> splitEdges;

        // This vector is here to keep track of created Coordinates
        std::vector<geom::CoordinateSequence*> splitCoordLists;

        void checkSplitEdgesCorrectness(std::vector<SegmentString*>& splitEdges);

        SegmentString* createSplitEdge(SegmentNode *ei0, SegmentNode *ei1);

        void addCollapsedNodes();

        void findCollapsesFromExistingVertices(
                        std::vector<size_t>& collapsedVertexIndexes);

        void findCollapsesFromInsertedNodes(
                std::vector<size_t>& collapsedVertexIndexes);

        bool findCollapseIndex(SegmentNode& ei0, SegmentNode& ei1,
                size_t& collapsedVertexIndex);
public:

        friend std::ostream& operator<< (std::ostream& os, const SegmentNodeList& l);

        typedef std::set<SegmentNode*,SegmentNodeLT> container;
        typedef container::iterator iterator;
        typedef container::const_iterator const_iterator;

        SegmentNodeList(const NodedSegmentString* newEdge): edge(*newEdge) {}

        SegmentNodeList(const NodedSegmentString& newEdge): edge(newEdge) {}

        const NodedSegmentString& getEdge() const { return edge; }

        // TODO: Is this a final class ?
        // Should remove the virtual in that case
        virtual ~SegmentNodeList();

        SegmentNode* add(const geom::Coordinate& intPt, size_t segmentIndex);

        SegmentNode* add(const geom::Coordinate *intPt, size_t segmentIndex) {
                return add(*intPt, segmentIndex);
        }

        /*
         * returns the set of SegmentNodes
         */
        //replaces iterator()
        // TODO: obsolete this function
        std::set<SegmentNode*,SegmentNodeLT>* getNodes() { return &nodeMap; }

        size_t size() const { return nodeMap.size(); }

        container::iterator begin() { return nodeMap.begin(); }
        container::const_iterator begin() const { return nodeMap.begin(); }
        container::iterator end() { return nodeMap.end(); }
        container::const_iterator end() const { return nodeMap.end(); }

        void addEndpoints();

        void addSplitEdges(std::vector<SegmentString*>& edgeList);

        void addSplitEdges(std::vector<SegmentString*>* edgeList) {
                assert(edgeList);
                addSplitEdges(*edgeList);
        }

        //string print();
};

std::ostream& operator<< (std::ostream& os, const SegmentNodeList& l);

} // namespace geos::noding
} // namespace geos

//#ifdef GEOS_INLINE
//# include "geos/noding/SegmentNodeList.inl"
//#endif

#endif

/**********************************************************************
 * $Log$
 * Revision 1.4  2006/06/12 11:29:23  strk
 * unsigned int => size_t
 *
 * Revision 1.3  2006/05/04 07:41:56  strk
 * const-correct size() method for SegmentNodeList
 *
 * Revision 1.2  2006/03/24 09:52:41  strk
 * USE_INLINE => GEOS_INLINE
 *
 * Revision 1.1  2006/03/09 16:46:49  strk
 * geos::geom namespace definition, first pass at headers split
 *
 **********************************************************************/

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