LHAPDF is hosted by Hepforge, IPPP Durham
LHAPDF  6.1.6
CompositePDF.h
1 // -*- C++ -*-
2 //
3 // This file is part of LHAPDF
4 // Copyright (C) 2012-2016 The LHAPDF collaboration (see AUTHORS for details)
5 //
6 #pragma once
7 #ifndef LHAPDF_CompositePDF_H
8 #define LHAPDF_CompositePDF_H
9 
10 #include "LHAPDF/PDF.h"
11 #include "LHAPDF/Interpolator.h"
12 #include "LHAPDF/Extrapolator.h"
13 #include "LHAPDF/KnotArray.h"
14 
15 namespace LHAPDF {
16 
17 
21  class CompositePDF : public PDF {
22  public:
23 
25 
26 
29 
33  template <typename PDFPTR>
34  CompositePDF(std::vector<PDFPTR>& pdfs) {
35  setConstituentPDFs(pdfs);
36  }
37 
39  CompositePDF(const std::vector< std::pair<std::string, int> >& setnames_members);
40 
42  CompositePDF(const std::vector<int>& lhaids);
43 
45  virtual ~CompositePDF() {
46  reset();
47  }
48 
50 
51 
53 
54 
56  const std::vector<PDF*> constituentPDFs() const {
57  return _pdfs;
58  }
59 
61  std::vector<PDF*> constituentPDFs() {
62  return _pdfs;
63  }
64 
66  template <typename PDFPTR>
67  void setConstituentPDFs(std::vector<PDFPTR>& pdfs) {
68  reset();
69  addConstituentPDFs(pdfs);
70  }
71 
73  void addConstituentPDF(PDF* pdf) {
74  _pdfs.push_back(pdf);
75  }
76 
78  template <typename PDFPTR>
79  void addConstituentPDFs(std::vector<PDFPTR>& pdfs) {
80  for (PDF* p : pdfs) addConstituentPDF(p);
81  }
82 
84  void reset() {
85  for (PDF* p : _pdfs) delete p;
86  _pdfs.clear();
87  }
88 
90 
91 
93 
94 
95  const std::vector<int>& flavors() const {
96  if (_flavors.empty()) {
97  for (PDF* p : _pdfs) {
98  for (int pid : p->flavors()) {
99  if (!contains(_flavors, pid)) _flavors.push_back(pid);
100  }
101  }
102  sort(_flavors.begin(), _flavors.end());
103  // std::cout << "Computed flavors: # = " << _flavors.size() << std::endl;
104  }
105  // std::cout << "Pre-computed " << _flavors.size() << " flavors" << std::endl;
106  return _flavors;
107  }
108 
109  bool inRangeQ2(double q2) const {
110  for (PDF* p : _pdfs)
111  if (!p->inRangeQ2(q2)) return false;
112  return true;
113  }
114 
115  bool inRangeX(double x) const {
116  for (PDF* p : _pdfs)
117  if (!p->inRangeX(x)) return false;
118  return true;
119  }
120 
122 
123 
124  protected:
125 
127  double _xfxQ2(int id, double x, double q2) const {
128  double rtn = 1;
129  for (const PDF* p : constituentPDFs())
130  rtn *= p->xfxQ2(id, x, q2);
131  return rtn;
132  }
133 
135  // std::vector< unique_ptr<PDF> > _pdfs;
136  std::vector<PDF*> _pdfs;
137 
138  };
139 
140 
141 }
142 #endif
void setConstituentPDFs(std::vector< PDFPTR > &pdfs)
Set the list of constituent PDFs.
Definition: CompositePDF.h:67
void addConstituentPDF(PDF *pdf)
Append a PDF to the list of constituents.
Definition: CompositePDF.h:73
CompositePDF()
Default (empty) constructor.
Definition: CompositePDF.h:28
PDF is the general interface for access to parton density information.
Definition: PDF.h:26
void addConstituentPDFs(std::vector< PDFPTR > &pdfs)
Append several PDFs to the list of constituents.
Definition: CompositePDF.h:79
bool inRangeX(double x) const
Grid range check for x.
Definition: CompositePDF.h:115
std::vector< PDF * > _pdfs
Collection of owned PDF pointers.
Definition: CompositePDF.h:136
std::vector< PDF * > constituentPDFs()
Get the list of constituent PDFs (non-const version)
Definition: CompositePDF.h:61
vector< int > _flavors
Locally cached list of supported PIDs.
Definition: PDF.h:561
bool inRangeQ2(double q2) const
Grid range check for Q2.
Definition: CompositePDF.h:109
CompositePDF(std::vector< PDFPTR > &pdfs)
Constructor from a list of PDF pointers.
Definition: CompositePDF.h:34
void reset()
Clear the list of constituent PDFs, deleting the objects.
Definition: CompositePDF.h:84
const std::vector< PDF * > constituentPDFs() const
Get the list of constituent PDFs (const version)
Definition: CompositePDF.h:56
virtual ~CompositePDF()
Virtual destructor to allow inheritance.
Definition: CompositePDF.h:45
Namespace for all LHAPDF functions and classes.
Definition: AlphaS.h:14
bool contains(const std::string &s, const std::string &sub)
Does a string s contain the sub substring?
Definition: Utils.h:110
const std::vector< int > & flavors() const
List of flavours defined by this PDF set.
Definition: CompositePDF.h:95
double _xfxQ2(int id, double x, double q2) const
Get PDF xf(x,Q2) value (via multiplicative PDF combination)
Definition: CompositePDF.h:127
A PDF defined by multiplicative combination of several constituent PDFs.
Definition: CompositePDF.h:21