examples/CustomCoordinateSequenceExample.h

   1 /**********************************************************************
   2  *
   3  * GEOS - Geometry Engine Open Source
   4  * http://geos.osgeo.org
   5  *
   6  * Copyright (C) 2001-2002 Vivid Solutions Inc.
   7  *
   8  * This is free software; you can redistribute and/or modify it under
   9  * the terms of the GNU Lesser General Public Licence as published
  10  * by the Free Software Foundation.
  11  * See the COPYING file for more information.
  12  *
  13  **********************************************************************
  14  * $Log$
  15  * Revision 1.2  2006/04/04 08:16:46  strk
  16  * Changed GEOSException hierarchy to be derived from std::runtime_exception.
  17  * Removed the GEOSException::toString redundant method (use ::what() instead)
  18  *
  19  * Revision 1.1  2004/07/08 19:41:27  strk
  20  * renamed to reflect JTS API.
  21  *
  22  * Revision 1.8  2004/07/02 13:28:26  strk
  23  * Fixed all #include lines to reflect headers layout change.
  24  * Added client application build tips in README.
  25  *
  26  * Revision 1.7  2003/11/07 01:23:42  pramsey
  27  * Add standard CVS headers licence notices and copyrights to all cpp and h
  28  * files.
  29  *
  30  *
  31  **********************************************************************/
  32
  33
  34 #ifndef GEOS_EX2_H
  35 #define GEOS_EX2_H
  36
  37 #include <geos/platform.h>
  38 #include <geos/geom.h>
  39 #include <geos/util.h>
  40
  41 using namespace std;
  42 using namespace geos;
  43
  44 /*
  45  * This is an example of how you can create a custom CoordinateSequence class that wraps
  46  * your own way of storing lists of coordinates. Depending on your internal storage
  47  * format some methods in the wrapper class might not work properly (but have to be
  48  * preserved for the interface compatibility. In this example CustomPointCoordinateSequence
  49  * wraps an array of point_3d. Since the array is fixed length, methods like 'add' or
  50  * 'deleteAt' will not work.
  51  */
  52 class CustomPointCoordinateSequence : public BasicCoordinateSequence {
  53 public:
  54         CustomPointCoordinateSequence(point_3d *newPts,int newSize);
  55         CustomPointCoordinateSequence(const CustomPointCoordinateSequence &cl);
  56         bool isEmpty();
  57         void add(Coordinate& c); //NoOp (exception)
  58         void add(point_3d p); //NoOp (exception)
  59         int getSize();
  60         Coordinate& getAt(int pos);
  61         point_3d getPointAt(int pos);
  62         void setAt(Coordinate& c, int pos);
  63         void setAt(point_3d p, int pos);
  64         void deleteAt(int pos); //NoOp (exception)
  65         vector<Coordinate>* toVector();
  66         vector<point_3d>* toPointVector();
  67         string toString();
  68         void setPoints(const vector<Coordinate> &v);
  69         void setPoints(const vector<point_3d> &v);
  70 private:
  71         point_3d *pts;
  72         int size;
  73 };
  74
  75 class CPCLException: public GEOSException {
  76 public:
  77         CPCLException();
  78         CPCLException(const string& msg);
  79         ~CPCLException();
  80 };
  81
  82 #endif
  83