FastNodingValidator.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: noding/FastNodingValidator.java rev. ??? (JTS-1.8)
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/noding/NodingIntersectionFinder.h> // for composition
#include <geos/algorithm/LineIntersector.h> // for composition
 
#include <memory>
#include <string>
#include <cassert>
 
// Forward declarations
namespace geos {
namespace noding {
class SegmentString;
}
}
 
namespace geos {
namespace noding { // geos.noding

class FastNodingValidator {
 
public:
 
    FastNodingValidator(const std::vector<std::unique_ptr<SegmentString>>& newSegStrings)
        :
        li(), // robust...
        segInt(),
        isValidVar(true)
    {
        segStrings.resize(newSegStrings.size());
        for (std::size_t i = 0; i < newSegStrings.size(); ++i) {
            segStrings[i] = newSegStrings[i].get();
        }
    }

    bool
    isValid()
    {
        execute();
        return isValidVar;
    }

    std::string getErrorMessage() const;

    void checkValid();
 
private:
 
    geos::algorithm::LineIntersector li;
 
    std::vector<SegmentString*> segStrings;
 
    std::unique_ptr<NodingIntersectionFinder> segInt;
 
    bool isValidVar;
 
    void
    execute()
    {
        if(segInt.get() != nullptr) {
            return;
        }
        checkInteriorIntersections();
    }
 
    void checkInteriorIntersections();
 
    // Declare type as noncopyable
    FastNodingValidator(const FastNodingValidator& other) = delete;
    FastNodingValidator& operator=(const FastNodingValidator& rhs) = delete;
};
 
} // namespace geos.noding
} // namespace geos