00001 //-------------------------------------------------------------------------- 00002 // 00003 // Environment: 00004 // This software is part of the EvtGen package developed jointly 00005 // for the BaBar and CLEO collaborations. If you use all or part 00006 // of it, please give an appropriate acknowledgement. 00007 // 00008 // Copyright Information: See EvtGen/COPYRIGHT 00009 // Copyright (C) 1998 Caltech, UCSB 00010 // 00011 // Module: EvtGen/EvtId.hh 00012 // 00013 // Description:Class for particle Id used in EvtGen. 00014 // 00015 // Modification history: 00016 // 00017 // DJL/RYD May 26, 1998 Module created 00018 // 00019 //------------------------------------------------------------------------ 00020 00021 #ifndef EVTID_HH 00022 #define EVTID_HH 00023 00024 #include <iostream> 00025 //class ostream; 00026 00027 class EvtId { 00028 00029 public: 00030 00031 //need a default constructor 00032 EvtId():_id(-1),_alias(-1){} 00033 00034 EvtId(int id,int alias):_id(id),_alias(alias){} 00035 00036 friend std::ostream& operator<<(std::ostream& s, const EvtId& v); 00037 00038 int operator==(const EvtId& id) const { return _id==id._id; } 00039 int operator!=(const EvtId& id) const { return _id!=id._id; } 00040 00041 int getId() const { return _id;} 00042 00043 int getAlias() const { return _alias;} 00044 00045 int isAlias() const { return _id!=_alias;} 00046 00047 private: 00048 00049 //particle number 0..n. The order of particles are determined 00050 //by the order in pdt.table 00051 int _id; 00052 //if the particle is an alias to another particle alias!=id 00053 //The only place where the alias should be used is for looking 00054 //up decays in the decay table. 00055 int _alias; 00056 00057 }; 00058 00059 #endif 00060
1.4.7