00001 /* @HEADER@ */ 00002 // ************************************************************************ 00003 // 00004 // Sundance 00005 // Copyright (2005) Sandia Corporation 00006 // 00007 // Copyright (year first published) Sandia Corporation. Under the terms 00008 // of Contract DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government 00009 // retains certain rights in this software. 00010 // 00011 // This library is free software; you can redistribute it and/or modify 00012 // it under the terms of the GNU Lesser General Public License as 00013 // published by the Free Software Foundation; either version 2.1 of the 00014 // License, or (at your option) any later version. 00015 // 00016 // This library is distributed in the hope that it will be useful, but 00017 // WITHOUT ANY WARRANTY; without even the implied warranty of 00018 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00019 // Lesser General Public License for more details. 00020 // 00021 // You should have received a copy of the GNU Lesser General Public 00022 // License along with this library; if not, write to the Free Software 00023 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 00024 // USA 00025 // Questions? Contact Kevin Long (krlong@sandia.gov), 00026 // Sandia National Laboratories, Livermore, California, USA 00027 // 00028 // ************************************************************************ 00029 /* @HEADER@ */ 00030 00031 #ifndef SUNDANCE_OBJECTWITHINSTANCEID_H 00032 #define SUNDANCE_OBJECTWITHINSTANCEID_H 00033 00034 #include "SundanceDefs.hpp" 00035 00036 00037 #ifndef DOXYGEN_DEVELOPER_ONLY 00038 00039 namespace Sundance 00040 { 00041 /** 00042 * ObjectWithInstanceID provides a common method for the 00043 * generation of instance-specific ID numbers. Subclasses will inherit 00044 * the id() method, and instances of those subclasses will be 00045 * given a unique ID at construction time. 00046 * 00047 * <h4> Design note: </h4> By templating on the derived type, 00048 * we can give each derived type its own sequence of ID numbers. 00049 */ 00050 template <class T> 00051 class ObjectWithInstanceID 00052 { 00053 public: 00054 /** Empty ctor will assign ID at construction time */ 00055 ObjectWithInstanceID() : id_(nextID()) {;} 00056 00057 /** Return this object's ID number */ 00058 int id() const {return id_;} 00059 00060 private: 00061 /** Generate the next ID in the sequence */ 00062 static int& nextID() {static int rtn=0; rtn++; return rtn;} 00063 00064 /** */ 00065 int id_; 00066 }; 00067 00068 } 00069 00070 00071 #endif /* DOXYGEN_DEVELOPER_ONLY */ 00072 #endif