src/geom/util/LinearComponentExtracter.cpp

   1 /**********************************************************************
   2  *
   3  * GEOS - Geometry Engine Open Source
   4  * http://geos.osgeo.org
   5  *
   6  * Copyright (C) 2001-2002 Vivid Solutions Inc.
   7  * Copyright (C) 2006 Refractions Research Inc.
   8  *
   9  * This is free software; you can redistribute and/or modify it under
  10  * the terms of the GNU Lesser General Public Licence as published
  11  * by the Free Software Foundation.
  12  * See the COPYING file for more information.
  13  *
  14  **********************************************************************/
  15
  16 #include <geos/export.h>
  17 #include <vector>
  18
  19 #include <geos/geom/GeometryComponentFilter.h>
  20 #include <geos/geom/util/LinearComponentExtracter.h>
  21
  22 namespace geos {
  23    namespace geom { // geos.geom
  24       namespace util { // geos.geom.util
  25
  26          LinearComponentExtracter::LinearComponentExtracter(std::vector<const LineString*> &newComps)
  27             :
  28          comps(newComps)
  29          {}
  30
  31          void LinearComponentExtracter::getLines(const Geometry &geom, std::vector<const LineString*> &ret)
  32          {
  33             LinearComponentExtracter lce(ret);
  34             geom.apply_ro(&lce);
  35          }
  36
  37          void LinearComponentExtracter::filter_rw(Geometry *geom)
  38          {
  39             if ( const LineString *ls=dynamic_cast<const LineString *>(geom) )
  40                comps.push_back(ls);
  41          }
  42
  43          void LinearComponentExtracter::filter_ro(const Geometry *geom)
  44          {
  45             if ( const LineString *ls=dynamic_cast<const LineString *>(geom) )
  46                comps.push_back(ls);
  47          }
  48
  49       }
  50    }
  51 }