| VRS - The Virtual Rendering System |
| version 3.3 |
00001 /********************************************************************** 00002 VRS - The Virtual Rendering System 00003 Copyright (C) 2001 Computer Graphics Systems Group at the 00004 Hasso-Plattner-Institute, Potsdam, Germany. 00005 This library is free software; you can redistribute it and/or 00006 modify it under the terms of the GNU Lesser General Public 00007 License as published by the Free Software Foundation; either 00008 version 2.1 of the License, or (at your option) any later version. 00009 This library is distributed in the hope that it will be useful, but 00010 WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 00012 See the GNU Lesser General Public License for more details. 00013 You should have received a copy of the GNU Lesser+ General Public 00014 License along with this library; if not, write to the FreeSoftware 00015 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA, 02111-1307, USA. 00016 **********************************************************************/ 00017 // $Id: skipiterator.h 4455 2004-11-03 10:58:29Z saar $ 00018 // $Date: 2004-11-03 11:58:29 +0100 (Wed, 03 Nov 2004) $ 00019 // $Revision: 4455 $ 00020 // $State$ 00021 // $Author: saar $ 00022 // 00023 // $Log$ 00024 // Revision 1.14 2004/11/03 10:58:28 saar 00025 // Class comment changed (Doxygen style) 00026 // 00027 // Revision 1.13 2004/06/03 12:48:01 kirsch 00028 // replaced vrs assertions with check args and internal error macros 00029 // 00030 // Revision 1.12 2004/03/12 16:28:39 baumann 00031 // macros VRS_NAMESPACE_BEGIN/_END expanded and removed 00032 // 00033 // Revision 1.11 2004/02/12 08:29:07 gerber 00034 // added macro VRS_SERIALIZATION_PARENT_CLASS for parent serialization 00035 // 00036 // Revision 1.10 2004/01/19 11:43:57 baumann 00037 // serialization mechanism improved 00038 // 00039 // Revision 1.9 2004/01/15 14:16:54 baumann 00040 // serialization mechanism improved 00041 // 00042 // Revision 1.8 2003/01/22 17:15:13 baumann 00043 // method lastTransactionNo() reimplemented 00044 // 00045 // Revision 1.7 2002/09/11 10:28:22 kirsch 00046 // fixed calculation of size (thanks to Christian Schneider) 00047 // 00048 // Revision 1.6 2002/08/06 16:24:02 baumann 00049 // VRS_API removed for template classes 00050 // 00051 // Revision 1.5 2002/07/11 14:21:52 kersting 00052 // added version for serialize method 00053 // 00054 // Revision 1.4 2002/07/05 05:55:27 baumann 00055 // changed return type of get()-method from "const T&" to "T" 00056 // 00057 // Revision 1.3 2002/07/03 15:52:50 baumann 00058 // several changes for iterator code 00059 // most iterators are now serializable again 00060 // 00061 // Revision 1.2 2002/07/02 06:12:34 baumann 00062 // VRS::Iterator<T> completely rewritten 00063 // 00064 // Revision 1.1 2002/03/04 12:03:54 kersting 00065 // directory structure changes 00066 // 00067 // Revision 1.7 2002/03/03 21:44:25 kosta 00068 // VRS_TYPEINFO-macro rewritten 00069 // 00070 // Revision 1.6 2002/02/19 10:34:12 kosta 00071 // undone all changes since 2002-02-15 00072 // 00073 // Revision 1.3 2002/01/15 16:25:54 kosta 00074 // macros rewritten for a better namespace support 00075 // 00076 // Revision 1.2 2001/11/13 16:36:31 kirsch 00077 // changed line feed to unix style (removed control-M) 00078 // 00079 // Revision 1.1.1.1 2001/06/08 08:09:20 kirsch 00080 // imported alpha-version by olli 00081 // 00082 00083 00084 #ifndef VRS_CONTAINER_SKIPITERATOR_H 00085 #define VRS_CONTAINER_SKIPITERATOR_H 00086 00087 #include <vrs/container/iterator.h> 00088 00089 namespace VRS { 00090 00092 template<typename T> 00093 class SkipIterator : public Iterator<T> { 00094 public: 00095 SkipIterator(const Iterator<T>* sourceItr, unsigned int skip = 1, unsigned int offset = 0) 00096 : itr_(sourceItr), skip_(skip), offset_(offset) { 00097 VRS_CheckArg(sourceItr, "no iterator"); VRS_CheckArg(skip > 0, "invalid skip value"); 00098 } 00104 //: { A, B, C, D, E, F, G, H } 00106 //: { A, C, E, G } 00108 //: { B, E, H } 00109 00110 virtual unsigned int size () const { return ((itr_->size() - offset_ + skip_ - 1) / skip_); } 00111 virtual T get(unsigned int index) const { return itr_->get(offset_ + index * skip_); } 00113 00114 virtual const TransactionNo& lastTransactionNo() const { return itr_->lastTransactionNo(); } 00115 00116 VRS_TYPEINFO(SkipIterator, Iterator<T>); 00117 VRS_SERIALIZABLE(SkipIterator); 00118 00119 protected: 00120 SkipIterator() { } // only for serialization 00121 00122 private: 00123 SO<const Iterator<T> > itr_; 00124 unsigned int skip_; 00125 unsigned int offset_; 00126 }; 00127 00128 template<typename T> 00129 inline void SkipIterator<T>::serialize(SerializationManager& doc) { 00130 VRS_SERIALIZATION_PARENT_CLASS(doc, Iterator<T>); 00131 serialization(doc, "Skip", skip_); 00132 serialization(doc, "Offset", offset_); 00133 serialization(doc, "Iterator", itr_); 00134 } 00135 00136 VRS_SERIALIZATION_REGISTRATION_TEMPLATE(SkipIterator); 00137 00138 } // namespace VRS 00139 00140 #endif // VRS_CONTAINER_SKIPITERATOR_H 00141