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File indexing completed on 2024-04-06 12:31:18
0001 // 0002 // 0003 // File: src/Constraint.cc 0004 // Purpose: Represent a mass constraint equation. 0005 // Created: Jul, 2000, sss, based on run 1 mass analysis code. 0006 // 0007 // CMSSW File : src/Constraint.cc 0008 // Original Author : Scott Stuart Snyder <snyder@bnl.gov> for D0 0009 // Imported to CMSSW by Haryo Sumowidagdo <Suharyo.Sumowidagdo@cern.ch> 0010 // 0011 0012 /** 0013 @file Constraint.cc 0014 0015 @brief Represent a mass constraint equation. 0016 See the documentation for the header file Constraint.h for details. 0017 0018 @par Creation date: 0019 July 2000. 0020 0021 @author 0022 Scott Stuart Snyder <snyder@bnl.gov>. 0023 0024 @par Modification History: 0025 Apr 2009: Haryo Sumowidagdo <Suharyo.Sumowidagdo@cern.ch>: 0026 Imported to CMSSW.<br> 0027 Oct 2009: Haryo Sumowidagdo <Suharyo.Sumowidagdo@cern.ch>: 0028 Added Doxygen tags for automatic generation of documentation. 0029 0030 @par Terms of Usage: 0031 With consent from the original author (Scott Snyder). 0032 */ 0033 0034 #include "TopQuarkAnalysis/TopHitFit/interface/Constraint.h" 0035 #include "TopQuarkAnalysis/TopHitFit/interface/Constraint_Intermed.h" 0036 #include <iostream> 0037 #include <cassert> 0038 0039 using std::ostream; 0040 using std::string; 0041 using std::unique_ptr; 0042 0043 namespace hitfit { 0044 0045 Constraint::Constraint(const Constraint& c) 0046 // 0047 // Purpose: Copy constructor. 0048 // 0049 // Inputs: 0050 // c - The instance to copy. 0051 // 0052 : _lhs(c._lhs->clone()), _rhs(c._rhs->clone()) {} 0053 0054 Constraint& Constraint::operator=(const Constraint& c) 0055 // 0056 // Purpose: Assignment. 0057 // 0058 // Inputs: 0059 // c - The instance to copy. 0060 // 0061 // Returns: 0062 // This instance. 0063 // 0064 { 0065 { 0066 unique_ptr<Constraint_Intermed> ci = c._lhs->clone(); 0067 _lhs = std::move(ci); 0068 } 0069 { 0070 unique_ptr<Constraint_Intermed> ci = c._rhs->clone(); 0071 _rhs = std::move(ci); 0072 } 0073 0074 return *this; 0075 } 0076 0077 Constraint::Constraint(std::string s) 0078 // 0079 // Purpose: Constructor. 0080 // Build a constraint from the string describing it. 0081 // 0082 // Inputs: 0083 // s - The string describing the constraint. 0084 // 0085 { 0086 // Split it at the equals sign. 0087 string::size_type i = s.find('='); 0088 assert(i != string::npos); 0089 0090 // And then build the two halves. 0091 { 0092 unique_ptr<Constraint_Intermed> ci = make_constraint_intermed(s.substr(0, i)); 0093 _lhs = std::move(ci); 0094 } 0095 { 0096 unique_ptr<Constraint_Intermed> ci = make_constraint_intermed(s.substr(i + 1)); 0097 _rhs = std::move(ci); 0098 } 0099 } 0100 0101 int Constraint::has_labels(int ilabel, int jlabel) const 0102 // 0103 // Purpose: See if this guy references both labels ILABEL and JLABEL 0104 // on a single side of the constraint equation. 0105 // 0106 // Inputs: 0107 // ilabel - The first label to test. 0108 // jlabel - The second label to test. 0109 // 0110 // Returns: 0111 // +1 if the LHS references both. 0112 // -1 if the RHS references both. 0113 // 0 if neither reference both. 0114 // 0115 { 0116 if (_lhs->has_labels(ilabel, jlabel)) 0117 return 1; 0118 else if (_rhs->has_labels(ilabel, jlabel)) 0119 return -1; 0120 else 0121 return 0; 0122 } 0123 0124 double Constraint::sum_mass_terms(const Fourvec_Event& ev) const 0125 // 0126 // Purpose: Evaluate the mass constraint, using the data in EV. 0127 // Return m(lhs)^2/2 - m(rhs)^2/2. 0128 // 0129 // Inputs: 0130 // ev - The event for which the constraint should be evaluated. 0131 // 0132 // Returns: 0133 // m(lhs)^2/2 - m(rhs)^2/2. 0134 // 0135 { 0136 return _lhs->sum_mass_terms(ev) - _rhs->sum_mass_terms(ev); 0137 } 0138 0139 /** 0140 0141 @brief Output stream operator, print the content of this Constraint to 0142 an output stream. 0143 0144 @param s The stream to which to write. 0145 0146 @param c The instance of Constraint to be printed. 0147 0148 */ 0149 std::ostream& operator<<(std::ostream& s, const Constraint& c) 0150 // 0151 // Purpose: Print the object to S. 0152 // 0153 // Inputs: 0154 // s - The stream to which to write. 0155 // c - The object to write. 0156 // 0157 // Returns: 0158 // The stream S. 0159 // 0160 { 0161 s << *c._lhs.get() << " = " << *c._rhs.get(); 0162 return s; 0163 } 0164 0165 } // namespace hitfit
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