UniqueCoordinateArrayFilter.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 * 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.
 *
 **********************************************************************/
 
#ifndef GEOS_UTIL_UNIQUECOORDINATEARRAYFILTER_H
#define GEOS_UTIL_UNIQUECOORDINATEARRAYFILTER_H
 
#include <geos/export.h>
#include <cassert>
#include <set>
#include <vector>
 
#include <geos/geom/CoordinateFilter.h>
#include <geos/geom/CoordinateSequence.h>
#include <geos/geom/Coordinate.h>
 
#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
 
namespace geos {
namespace util { // geos::util
 
/*
 *  A CoordinateFilter that fills a vector of Coordinate const pointers.
 *  The set of coordinates contains no duplicate points.
 *
 *  Last port: util/UniqueCoordinateArrayFilter.java rev. 1.17
 */
class GEOS_DLL UniqueCoordinateArrayFilter: public geom::CoordinateFilter
{
public:
        UniqueCoordinateArrayFilter(geom::Coordinate::ConstVect &target)
                : pts(target)
        {}

        virtual ~UniqueCoordinateArrayFilter() {}

        virtual void filter_ro(const geom::Coordinate *coord)
        {
                if ( uniqPts.insert(coord).second )
                {
                        pts.push_back(coord);
                }
    }
 
private:
        geom::Coordinate::ConstVect &pts;       // target set reference
        geom::Coordinate::ConstSet uniqPts;     // unique points set
 
    // Declare type as noncopyable
    UniqueCoordinateArrayFilter(const UniqueCoordinateArrayFilter& other);
    UniqueCoordinateArrayFilter& operator=(const UniqueCoordinateArrayFilter& rhs);
};
 
} // namespace geos::util
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // GEOS_UTIL_UNIQUECOORDINATEARRAYFILTER_H