RDKit
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RandomSampleAllBBs.h
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32 
33 #include <RDGeneral/export.h>
34 #ifndef RGROUP_RANDOM_SAMPLE_ALLBBS_H
35 #define RGROUP_RANDOM_SAMPLE_ALLBBS_H
36 
38 #include <boost/random.hpp>
39 #include <boost/random/uniform_int_distribution.hpp>
40 #include <sstream>
41 
42 namespace RDKit {
43 //! RandomSampleAllBBsStrategy
44 //! Randomly sample rgroup indices
45 
46 //! This is a class for randomly enumerating reagents that ensures all reagents
47 // are sampled.
48 /*!
49  basic usage:
50 
51  \verbatim
52  std::vector<MOL_SPTR_VECT> bbs;
53  bbs.push_back( bbs_for_reactants_1 );
54  bbs.push_back( bbs_for_reactants_2 );
55 
56  RandomSampleAllBBsStrategy rgroups;
57  rgroups.initialize(rxn, bbs);
58  for(size_t i=0; i<num_samples && rgroups; ++i) {
59  MOL_SPTR_VECT rvect = getReactantsFromRGroups(bbs, rgroups.next());
60  std::vector<MOL_SPTR_VECT> lprops = rxn.RunReactants(rvect);
61  ...
62  }
63  \endverbatim
64 
65  See EnumerationStrategyBase for more details and usage.
66 */
67 
69  : public EnumerationStrategyBase {
70  boost::uint64_t m_numPermutationsProcessed;
71  size_t m_offset;
72  size_t m_maxoffset;
73 
74  boost::minstd_rand m_rng;
75  std::vector<boost::random::uniform_int_distribution<>> m_distributions;
76 
77  public:
80  m_numPermutationsProcessed(0),
81  m_offset(0),
82  m_maxoffset(0),
83  m_rng(),
84  m_distributions() {
85  for (size_t i = 0; i < m_permutation.size(); ++i) {
86  m_distributions.push_back(
87  boost::random::uniform_int_distribution<>(0, m_permutation[i] - 1));
88  }
89  }
91 
93  const EnumerationTypes::BBS &) {
94  m_distributions.clear();
95  m_permutation.resize(m_permutationSizes.size());
96  m_offset = 0;
97  m_maxoffset =
98  *std::max_element(m_permutationSizes.begin(), m_permutationSizes.end());
99  for (size_t i = 0; i < m_permutationSizes.size(); ++i) {
100  m_distributions.push_back(boost::random::uniform_int_distribution<>(
101  0, m_permutationSizes[i] - 1));
102  }
103 
104  m_numPermutationsProcessed = 0;
105  }
106 
107  virtual const char *type() const { return "RandomSampleAllBBsStrategy"; }
108 
109  //! The current permutation {r1, r2, ...}
110  virtual const EnumerationTypes::RGROUPS &next() {
111  if (m_offset >= m_maxoffset) {
112  for (size_t i = 0; i < m_permutation.size(); ++i) {
113  m_permutation[i] = m_distributions[i](m_rng);
114  }
115  m_offset = 0;
116  } else {
117  for (size_t i = 0; i < m_permutation.size(); ++i) {
118  m_permutation[i] = (m_permutation[i] + 1) % m_permutationSizes[i];
119  }
120  ++m_offset;
121  }
122  ++m_numPermutationsProcessed;
123 
124  return m_permutation;
125  }
126 
127  virtual boost::uint64_t getPermutationIdx() const {
128  return m_numPermutationsProcessed;
129  }
130 
131  virtual operator bool() const { return true; }
132 
134  return new RandomSampleAllBBsStrategy(*this);
135  }
136 
137  private:
138 #ifdef RDK_USE_BOOST_SERIALIZATION
139  friend class boost::serialization::access;
140 
141  template <class Archive>
142  void save(Archive &ar, const unsigned int /*version*/) const {
143  // invoke serialization of the base class
144  ar << boost::serialization::base_object<const EnumerationStrategyBase>(
145  *this);
146  ar << m_numPermutationsProcessed;
147 
148  std::stringstream random;
149  random << m_rng;
150  std::string s = random.str();
151  ar << s;
152 
153  ar << m_offset;
154  ar << m_maxoffset;
155  }
156 
157  template <class Archive>
158  void load(Archive &ar, const unsigned int /*version*/) {
159  // invoke serialization of the base class
160  ar >> boost::serialization::base_object<EnumerationStrategyBase>(*this);
161  ar >> m_numPermutationsProcessed;
162  std::string s;
163  ar >> s;
164  std::stringstream random(s);
165  random >> m_rng;
166  ar >> m_offset;
167  ar >> m_maxoffset;
168 
169  // reset the uniform distributions
170  m_distributions.clear();
171  for (size_t i = 0; i < m_permutationSizes.size(); ++i) {
172  m_distributions.push_back(boost::random::uniform_int_distribution<>(
173  0, m_permutationSizes[i] - 1));
174  }
175  }
176 
177  template <class Archive>
178  void serialize(Archive &ar, const unsigned int file_version) {
179  boost::serialization::split_member(ar, *this, file_version);
180  }
181 #endif
182 };
183 } // namespace RDKit
184 
185 #ifdef RDK_USE_BOOST_SERIALIZATION
186 BOOST_CLASS_VERSION(RDKit::RandomSampleAllBBsStrategy, 1)
187 #endif
188 
189 #endif
RDKit::RandomSampleAllBBsStrategy::RandomSampleAllBBsStrategy
RandomSampleAllBBsStrategy()
Definition: RandomSampleAllBBs.h:78
EnumerationStrategyBase.h
RDKit::RandomSampleAllBBsStrategy::copy
EnumerationStrategyBase * copy() const
copy the enumeration strategy complete with current state
Definition: RandomSampleAllBBs.h:133
RDKit::RandomSampleAllBBsStrategy
This is a class for randomly enumerating reagents that ensures all reagents.
Definition: RandomSampleAllBBs.h:69
RDKit::RandomSampleAllBBsStrategy::initializeStrategy
void initializeStrategy(const ChemicalReaction &, const EnumerationTypes::BBS &)
Definition: RandomSampleAllBBs.h:92
RDKit::EnumerationTypes::BBS
std::vector< MOL_SPTR_VECT > BBS
Definition: EnumerateTypes.h:42
RDKit::RandomSampleAllBBsStrategy::type
virtual const char * type() const
Definition: RandomSampleAllBBs.h:107
RDKit::RandomSampleAllBBsStrategy::getPermutationIdx
virtual boost::uint64_t getPermutationIdx() const
Returns how many permutations have been processed by this strategy.
Definition: RandomSampleAllBBs.h:127
RDKit::ChemicalReaction
This is a class for storing and applying general chemical reactions.
Definition: Reaction.h:120
RDKit::EnumerationStrategyBase
Definition: EnumerationStrategyBase.h:121
RDKit::EnumerationTypes::RGROUPS
std::vector< boost::uint64_t > RGROUPS
Definition: EnumerateTypes.h:56
RDKit
Std stuff.
Definition: Atom.h:30
RDKit::RandomSampleAllBBsStrategy::next
virtual const EnumerationTypes::RGROUPS & next()
The current permutation {r1, r2, ...}.
Definition: RandomSampleAllBBs.h:110
RDKIT_CHEMREACTIONS_EXPORT
#define RDKIT_CHEMREACTIONS_EXPORT
Definition: export.h:60
RDKit::EnumerationStrategyBase::initialize
void initialize(const ChemicalReaction &reaction, const EnumerationTypes::BBS &building_blocks)
Definition: EnumerationStrategyBase.h:143
export.h