GEOS  3.3.3
GeometryFilter.h
1 /**********************************************************************
2  * $Id: GeometryFilter.h 2556 2009-06-06 22:22:28Z strk $
3  *
4  * GEOS - Geometry Engine Open Source
5  * http://geos.refractions.net
6  *
7  * Copyright (C) 2001-2002 Vivid Solutions Inc.
8  * Copyright (C) 2005 2006 Refractions Research Inc.
9  *
10  * This is free software; you can redistribute and/or modify it under
11  * the terms of the GNU Lesser General Public Licence as published
12  * by the Free Software Foundation.
13  * See the COPYING file for more information.
14  *
15  **********************************************************************/
16 
17 #ifndef GEOS_GEOM_GEOMETRYFILTER_H
18 #define GEOS_GEOM_GEOMETRYFILTER_H
19 
20 //#include <geos/platform.h>
21 #include <geos/export.h>
22 #include <geos/inline.h>
23 
24 #include <string>
25 #include <vector>
26 #include <cassert>
27 
28 namespace geos {
29  namespace geom { // geos::geom
30  class Geometry;
31  }
32 }
33 
34 namespace geos {
35 namespace geom { // geos::geom
36 
37 
49 class GEOS_DLL GeometryFilter {
50 public:
51  /*
52  * Performs an operation with or on <code>geom</code>.
53  *
54  * @param geom a <code>Geometry</code> to which the filter
55  * is applied.
56  *
57  * NOTE: this are not pure abstract to allow read-only
58  * or read-write-only filters to avoid defining a fake
59  * version of the not-implemented kind.
60  */
61  virtual void filter_ro(const Geometry * /*geom*/) { assert(0); }
62  virtual void filter_rw(Geometry * /*geom*/) { assert(0); }
63 
64  virtual ~GeometryFilter() {}
65 };
66 
67 } // namespace geos::geom
68 } // namespace geos
69 
70 //#ifdef GEOS_INLINE
71 //# include "geos/geom/GeometryFilter.inl"
72 //#endif
73 
74 #endif // ndef GEOS_GEOM_GEOMETRYFILTER_H
75 
76 /**********************************************************************
77  * $Log$
78  * Revision 1.4 2006/06/12 17:14:11 strk
79  * added assert(0) version of filter_ro() and filter_rw() to allow implementations to only defined the required one.
80  *
81  * Revision 1.3 2006/06/08 11:20:24 strk
82  * Added missing virtual destructor to abstract classes.
83  *
84  * Revision 1.2 2006/03/24 09:52:41 strk
85  * USE_INLINE => GEOS_INLINE
86  *
87  * Revision 1.1 2006/03/09 16:46:49 strk
88  * geos::geom namespace definition, first pass at headers split
89  *
90  **********************************************************************/