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# LinearComponentExtracter.h

    00001 /**********************************************************************
    00002  * $Id: LinearComponentExtracter.h 2772 2009-12-03 19:30:54Z 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_LINEARCOMPONENTEXTRACTER_H
    00018 #define GEOS_GEOM_UTIL_LINEARCOMPONENTEXTRACTER_H
    00019
    00020
    00021 #include <geos/export.h>
    00022 #include <vector>
    00023
    00024 #include <geos/geom/GeometryComponentFilter.h>
    00025 #include <geos/geom/Geometry.h> // to be removed when we have the .inl
    00026 #include <geos/geom/LineString.h> // to be removed when we have the .inl
    00027 //#include <geos/platform.h>
    00028
    00029 namespace geos {
    00030 namespace geom { // geos.geom
    00031 namespace util { // geos.geom.util
    00032
    00036 class GEOS_DLL LinearComponentExtracter: public GeometryComponentFilter {
    00037
    00038 private:
    00039
    00040         LineString::ConstVect &comps;
    00041
    00042     // Declare type as noncopyable
    00043     LinearComponentExtracter(const LinearComponentExtracter& other);
    00044     LinearComponentExtracter& operator=(const LinearComponentExtracter& rhs);
    00045
    00046 public:
    00054         static void getLines(const Geometry &geom, std::vector<const LineString*> &ret)
    00055         {
    00056                 LinearComponentExtracter lce(ret);
    00057                 geom.apply_ro(&lce);
    00058         }
    00059
    00064         LinearComponentExtracter(std::vector<const LineString*> &newComps)
    00065                 :
    00066                 comps(newComps)
    00067                 {}
    00068
    00069         void filter_rw(Geometry *geom)
    00070         {
    00071 if ( const LineString *ls=dynamic_cast<const LineString *>(geom) )
    00072                 comps.push_back(ls);
    00073         }
    00074
    00075         void filter_ro(const Geometry *geom)
    00076         {
    00077 if ( const LineString *ls=dynamic_cast<const LineString *>(geom) )
    00078                 comps.push_back(ls);
    00079         }
    00080
    00081 };
    00082
    00083 } // namespace geos.geom.util
    00084 } // namespace geos.geom
    00085 } // namespace geos
    00086
    00087 #endif
    00088
    00089 /**********************************************************************
    00090  * $Log$
    00091  * Revision 1.1  2006/03/09 16:46:49  strk
    00092  * geos::geom namespace definition, first pass at headers split
    00093  *
    00094  **********************************************************************/