PointExtracter.h

00001 /**********************************************************************
00002  *
00003  * GEOS - Geometry Engine Open Source
00004  * http://geos.osgeo.org
00005  *
00006  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00007  * Copyright (C) 2006 Refractions Research Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  **********************************************************************/
00015 
00016 #ifndef GEOS_GEOM_UTIL_POINTEXTRACTER_H
00017 #define GEOS_GEOM_UTIL_POINTEXTRACTER_H
00018 
00019 #include <geos/export.h>
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 GEOS_DLL PointExtracter: public GeometryFilter {
00033 
00034 public:
00041         static void getPoints(const Geometry &geom, Point::ConstVect &ret)
00042         {
00043                 PointExtracter pe(ret);
00044                 geom.apply_ro(&pe);
00045         }
00046 
00051         PointExtracter(Point::ConstVect& newComps)
00052                 :
00053                 comps(newComps)
00054                 {}
00055 
00056         void filter_rw(Geometry *geom)
00057         {
00058 if ( const Point *p=dynamic_cast<const Point *>(geom) )
00059                 comps.push_back(p);
00060         }
00061 
00062         void filter_ro(const Geometry *geom)
00063         {
00064 if ( const Point *p=dynamic_cast<const Point *>(geom) )
00065                 comps.push_back(p);
00066         }
00067 
00068 private:
00069 
00070         Point::ConstVect& comps;
00071 
00072     // Declare type as noncopyable
00073     PointExtracter(const PointExtracter& other);
00074     PointExtracter& operator=(const PointExtracter& rhs);
00075 };
00076 
00077 } // namespace geos.geom.util
00078 } // namespace geos.geom
00079 } // namespace geos
00080 
00081 #endif

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