PointExtracter.h

00001 /**********************************************************************
00002  * $Id: PointExtracter.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_GEOM_UTIL_POINTEXTRACTER_H
00018 #define GEOS_GEOM_UTIL_POINTEXTRACTER_H
00019 
00020 #include <geos/geom/GeometryFilter.h>
00021 #include <geos/geom/Point.h>
00022 #include <geos/platform.h>
00023 #include <vector>
00024 
00025 namespace geos {
00026 namespace geom { // geos.geom
00027 namespace util { // geos.geom.util
00028 
00032 class PointExtracter: public GeometryFilter {
00033 
00034 private:
00035         Point::ConstVect& comps;
00036 
00037 public:
00044         static void getPoints(const Geometry &geom, Point::ConstVect &ret)
00045         {
00046                 PointExtracter pe(ret);
00047                 geom.apply_ro(&pe);
00048         }
00049 
00054         PointExtracter(Point::ConstVect& newComps)
00055                 :
00056                 comps(newComps)
00057                 {}
00058 
00059         void filter_rw(Geometry *geom)
00060         {
00061 if ( const Point *p=dynamic_cast<const Point *>(geom) )
00062                 comps.push_back(p);
00063         }
00064 
00065         void filter_ro(const Geometry *geom)
00066         {
00067 if ( const Point *p=dynamic_cast<const Point *>(geom) )
00068                 comps.push_back(p);
00069         }
00070 
00071 };
00072 
00073 } // namespace geos.geom.util
00074 } // namespace geos.geom
00075 } // namespace geos
00076 
00077 #endif
00078 
00079 /**********************************************************************
00080  * $Log$
00081  * Revision 1.1  2006/03/09 16:46:49  strk
00082  * geos::geom namespace definition, first pass at headers split
00083  *
00084  **********************************************************************/

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