BoundablePair.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2016 Daniel Baston
 *
 * 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: index/strtree/BoundablePair.java (JTS-1.14)
 *
 **********************************************************************/

#ifndef GEOS_INDEX_STRTREE_BOUNDABLEPAIR_H
#define GEOS_INDEX_STRTREE_BOUNDABLEPAIR_H

#include <geos/index/strtree/Boundable.h>
#include <geos/index/strtree/ItemDistance.h>
#include <queue>

namespace geos {
namespace index {
namespace strtree {

class BoundablePair {
private:
    const Boundable* boundable1;
    const Boundable* boundable2;
    ItemDistance* itemDistance;
    double mDistance;

public:
    struct BoundablePairQueueCompare {
        bool
        operator()(const BoundablePair* a, const BoundablePair* b)
        {
            return a->getDistance() > b->getDistance();
        }
    };

    typedef std::priority_queue<BoundablePair*, std::vector<BoundablePair*>, BoundablePairQueueCompare> BoundablePairQueue;
    BoundablePair(const Boundable* boundable1, const Boundable* boundable2, ItemDistance* itemDistance);

    const Boundable* getBoundable(int i) const;

    double distance() const;

    double getDistance() const;

    bool isLeaves() const;

    double maximumDistance();

    static bool isComposite(const Boundable* item);

    static double area(const Boundable* b);

    void expandToQueue(BoundablePairQueue&, double minDistance);
    void expand(const Boundable* bndComposite, const Boundable* bndOther, bool isFlipped, BoundablePairQueue& priQ,
                double minDistance);
};
}
}
}

#endif