GEOS  3.4.2
ComponentCoordinateExtracter.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_COMPONENTCOORDINATEEXTRACTER_H
00017 #define GEOS_GEOM_UTIL_COMPONENTCOORDINATEEXTRACTER_H
00018 
00019 #include <vector>
00020 
00021 #include <geos/geom/GeometryComponentFilter.h>
00022 #include <geos/geom/Geometry.h> // to be removed when we have the .inl
00023 #include <geos/geom/Coordinate.h> // to be removed when we have the .inl
00024 #include <geos/geom/LineString.h> // to be removed when we have the .inl
00025 #include <geos/geom/Point.h> // to be removed when we have the .inl
00026 //#include <geos/platform.h>
00027 
00028 namespace geos {
00029 namespace geom { // geos::geom
00030 namespace util { // geos::geom::util
00031 
00038 class ComponentCoordinateExtracter : public GeometryComponentFilter 
00039 {
00040 public:
00048         static void getCoordinates(const Geometry &geom, std::vector<const Coordinate*> &ret)
00049         {
00050                 ComponentCoordinateExtracter cce(ret);
00051                 geom.apply_ro(&cce);
00052         }
00053 
00058         ComponentCoordinateExtracter( std::vector<const Coordinate*> &newComps)
00059                 :
00060                 comps(newComps)
00061                 {}
00062 
00063         void filter_rw( Geometry * geom)
00064         {
00065                 if (    geom->getGeometryTypeId() == geos::geom::GEOS_LINEARRING 
00066                         ||      geom->getGeometryTypeId() == geos::geom::GEOS_LINESTRING
00067                         ||      geom->getGeometryTypeId() == geos::geom::GEOS_POINT ) 
00068                         comps.push_back( geom->getCoordinate() );
00069                 //if (  typeid( *geom ) == typeid( LineString )
00070                 //      ||      typeid( *geom ) == typeid( Point ) )
00071                 //if ( const Coordinate *ls=dynamic_cast<const Coordinate *>(geom) )
00072                 //      comps.push_back(ls);
00073         }
00074 
00075         void filter_ro( const Geometry * geom)
00076         {
00077                 //if (  typeid( *geom ) == typeid( LineString )
00078                 //      ||      typeid( *geom ) == typeid( Point ) )
00079                 if (    geom->getGeometryTypeId() == geos::geom::GEOS_LINEARRING 
00080                         ||      geom->getGeometryTypeId() == geos::geom::GEOS_LINESTRING
00081                         ||      geom->getGeometryTypeId() == geos::geom::GEOS_POINT ) 
00082                         comps.push_back( geom->getCoordinate() );
00083                 //if ( const Coordinate *ls=dynamic_cast<const Coordinate *>(geom) )
00084                 //      comps.push_back(ls);
00085         }
00086 
00087 private:
00088 
00089         Coordinate::ConstVect &comps;
00090 
00091     // Declare type as noncopyable
00092     ComponentCoordinateExtracter(const ComponentCoordinateExtracter& other);
00093     ComponentCoordinateExtracter& operator=(const ComponentCoordinateExtracter& rhs);
00094 };
00095 
00096 } // namespace geos.geom.util
00097 } // namespace geos.geom
00098 } // namespace geos
00099 
00100 #endif //GEOS_GEOM_UTIL_COMPONENTCOORDINATEEXTRACTER_H