# UniqueCoordinateArrayFilter.h

    00001 /**********************************************************************
    00002  * $Id: UniqueCoordinateArrayFilter.h 1820 2006-09-06 16:54:23Z mloskot $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2001-2002 Vivid Solutions Inc.
    00008  * Copyright (C) 2006 Refractions Research Inc.
    00009  *
    00010  * This is free software; you can redistribute and/or modify it under
    00011  * the terms of the GNU Lesser General Public Licence as published
    00012  * by the Free Software Foundation.
    00013  * See the COPYING file for more information.
    00014  *
    00015  **********************************************************************/
    00016
    00017 #ifndef GEOS_UTIL_UNIQUECOORDINATEARRAYFILTER_H
    00018 #define GEOS_UTIL_UNIQUECOORDINATEARRAYFILTER_H
    00019
    00020 #include <cassert>
    00021 #include <set>
    00022 #include <vector>
    00023
    00024 #include <geos/geom/CoordinateFilter.h>
    00025 #include <geos/geom/CoordinateSequence.h>
    00026 #include <geos/geom/Coordinate.h>
    00027
    00028 namespace geos {
    00029 namespace util { // geos::util
    00030
    00031 /*
    00032  *  A CoordinateFilter that fills a vector of Coordinate const pointers.
    00033  *  The set of coordinates contains no duplicate points.
    00034  *
    00035  *  Last port: util/UniqueCoordinateArrayFilter.java rev. 1.17
    00036  */
    00037 class UniqueCoordinateArrayFilter: public geom::CoordinateFilter {
    00038
    00039 private:
    00040         geom::Coordinate::ConstVect &pts;       // target set reference
    00041         geom::Coordinate::ConstSet uniqPts;     // unique points set
    00042
    00043 public:
    00049         UniqueCoordinateArrayFilter(geom::Coordinate::ConstVect &target)
    00050                 : pts(target)
    00051         {}
    00052
    00059         virtual ~UniqueCoordinateArrayFilter() {}
    00060
    00066         virtual void filter_ro(const geom::Coordinate *coord)
    00067         {
    00068                 if ( uniqPts.insert(coord).second )
    00069                 {
    00070                         pts.push_back(coord);
    00071                 }
    00072         }
    00073
    00074 };
    00075
    00076 } // namespace geos::util
    00077 } // namespace geos
    00078
    00079 #endif // GEOS_UTIL_UNIQUECOORDINATEARRAYFILTER_H
    00080
    00081 /**********************************************************************
    00082  * $Log$
    00083  * Revision 1.4  2006/06/19 23:33:03  strk
    00084  * Don't *require* CoordinateFilters to define both read-only and read-write methods.
    00085  *
    00086  * Revision 1.3  2006/06/12 10:10:39  strk
    00087  * Fixed getGeometryN() to take size_t rather then int, changed unsigned int parameters to size_t.
    00088  *
    00089  * Revision 1.2  2006/04/10 09:21:23  mloskot
    00090  * Added new test for UniqueCoordinateArrayFilter class. Small fixes related to signed/unsigned comparison.
    00091  *
    00092  * Revision 1.1  2006/03/09 16:46:49  strk
    00093  * geos::geom namespace definition, first pass at headers split
    00094  *
    00095  **********************************************************************/