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  **********************************************************************/
  15
  16
  17 #ifndef GEOS_EX2_H
  18 #define GEOS_EX2_H
  19
  20 #include <geos/platform.h>
  21 #include <geos/geom.h>
  22 #include <geos/util.h>
  23
  24 using namespace std;
  25 using namespace geos;
  26
  27 /*
  28  * This is an example of how you can create a custom CoordinateSequence class that wraps
  29  * your own way of storing lists of coordinates. Depending on your internal storage
  30  * format some methods in the wrapper class might not work properly (but have to be
  31  * preserved for the interface compatibility. In this example CustomPointCoordinateSequence
  32  * wraps an array of point_3d. Since the array is fixed length, methods like 'add' or
  33  * 'deleteAt' will not work.
  34  */
  35 class CustomPointCoordinateSequence : public BasicCoordinateSequence {
  36 public:
  37         CustomPointCoordinateSequence(point_3d *newPts,int newSize);
  38         CustomPointCoordinateSequence(const CustomPointCoordinateSequence &cl);
  39         bool isEmpty();
  40         void add(Coordinate& c); //NoOp (exception)
  41         void add(point_3d p); //NoOp (exception)
  42         int getSize();
  43         Coordinate& getAt(int pos);
  44         point_3d getPointAt(int pos);
  45         void setAt(Coordinate& c, int pos);
  46         void setAt(point_3d p, int pos);
  47         void deleteAt(int pos); //NoOp (exception)
  48         vector<Coordinate>* toVector();
  49         vector<point_3d>* toPointVector();
  50         string toString();
  51         void setPoints(const vector<Coordinate> &v);
  52         void setPoints(const vector<point_3d> &v);
  53 private:
  54         point_3d *pts;
  55         int size;
  56 };
  57
  58 class CPCLException: public GEOSException {
  59 public:
  60         CPCLException();
  61         CPCLException(const string& msg);
  62         ~CPCLException();
  63 };
  64
  65 #endif
  66