RDProps.h

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//  Copyright (C) 2016-2026 Brian Kelley and other RDKit contributors
//   @@ All Rights Reserved @@
//
//  This file is part of the RDKit.
//  The contents are covered by the terms of the BSD license
//  which is included in the file license.txt, found at the root
//  of the RDKit source tree.
//
#include <RDGeneral/export.h>
#ifndef RDKIT_RDPROPS_H
#define RDKIT_RDPROPS_H
#include "Dict.h"
#include "types.h"
 
namespace RDKit {
 
class RDProps {
 protected:
  mutable Dict d_props;
  // It is a quirk of history that this is mutable
  //  as the RDKit allows properties to be set
  //  on const objects.
 
 public:
  RDProps() : d_props() {}
  RDProps(const RDProps &rhs) : d_props(rhs.d_props) {}
  RDProps &operator=(const RDProps &rhs) {
    if (this == &rhs) {
      return *this;
    }
    d_props = rhs.d_props;
    return *this;
  }
  RDProps(RDProps &&o) noexcept = default;
  RDProps &operator=(RDProps &&rhs) noexcept = default;
 
  void clear() { d_props.reset(); }
  //! gets the underlying Dictionary
  const Dict &getDict() const { return d_props; }
  Dict &getDict() { return d_props; }
 
  // ------------------------------------
  //  Local Property Dict functionality
  //  all setProp functions are const because they
  //     are not meant to change the atom chemically
  // ------------------------------------
  //! returns a list with the names of our \c properties
  STR_VECT getPropList(bool includePrivate = true,
                       bool includeComputed = true) const {
    const STR_VECT &tmp = d_props.keys();
    STR_VECT res, computed;
    if (!includeComputed &&
        getPropIfPresent(RDKit::detail::computedPropName, computed)) {
      computed.emplace_back(RDKit::detail::computedPropName);
    }
 
    auto pos = tmp.begin();
    while (pos != tmp.end()) {
      if ((includePrivate || (*pos)[0] != '_') &&
          std::find(computed.begin(), computed.end(), *pos) == computed.end()) {
        res.push_back(*pos);
      }
      ++pos;
    }
    return res;
  }
 
  //! sets a \c property value
  /*!
    \param key the name under which the \c property should be stored.
    If a \c property is already stored under this name, it will be
    replaced.
    \param val the value to be stored
    \param computed (optional) allows the \c property to be flagged
    \c computed.
  */
 
  //! \overload
  template <typename T>
  void setProp(const std::string_view key, T val, bool computed = false) const {
    if(key.empty()) {
      throw ValueErrorException("Cannot set property with empty key");
    }
    if (computed) {
      STR_VECT compLst;
      getPropIfPresent(RDKit::detail::computedPropName, compLst);
      if (std::find(compLst.begin(), compLst.end(), key) == compLst.end()) {
        compLst.emplace_back(key);
        d_props.setVal(RDKit::detail::computedPropName, compLst);
      }
    }
    d_props.setVal(key, val);
  }
 
  //! allows retrieval of a particular property value
  /*!
 
    \param key the name under which the \c property should be stored.
    If a \c property is already stored under this name, it will be
    replaced.
    \param res a reference to the storage location for the value.
 
    <b>Notes:</b>
    - if no \c property with name \c key exists, a KeyErrorException will be
    thrown.
    - the \c boost::lexical_cast machinery is used to attempt type
    conversions.
    If this fails, a \c boost::bad_lexical_cast exception will be thrown.
 
  */
  //! \overload
  template <typename T>
  void getProp(const std::string_view key, T &res) const {
    d_props.getVal(key, res);
  }
 
  //! \overload
  template <typename T>
  T getProp(const std::string_view key) const {
    return d_props.getVal<T>(key);
  }
 
  //! returns whether or not we have a \c property with name \c key
  //!  and assigns the value if we do
  //! \overload
  template <typename T>
  bool getPropIfPresent(const std::string_view key, T &res) const {
    return d_props.getValIfPresent(key, res);
  }
 
  //! \overload
  bool hasProp(const std::string_view key) const { return d_props.hasVal(key); }
 
  //! clears the value of a \c property
  /*!
    <b>Notes:</b>
    - if no \c property with name \c key exists, this will be a no-op.
    - if the \c property is marked as \c computed, it will also be removed
    from our list of \c computedProperties
  */
  //! \overload
  void clearProp(const std::string_view key) const {
    STR_VECT compLst;
    if (getPropIfPresent(RDKit::detail::computedPropName, compLst)) {
      auto svi = std::find(compLst.begin(), compLst.end(), key);
      if (svi != compLst.end()) {
        compLst.erase(svi);
        d_props.setVal(RDKit::detail::computedPropName, compLst);
      }
    }
    d_props.clearVal(key);
  }
 
  //! clears all of our \c computed \c properties
  void clearComputedProps() const {
    STR_VECT compLst;
    if (getPropIfPresent(RDKit::detail::computedPropName, compLst) &&
        !compLst.empty()) {
      for (const auto &sv : compLst) {
        d_props.clearVal(sv);
      }
      compLst.clear();
      d_props.setVal(RDKit::detail::computedPropName, compLst);
    }
  }
 
  //! update the properties from another
  /*
    \param source    Source to update the properties from
    \param preserve  Existing If true keep existing data, else override from
    the source
  */
  void updateProps(const RDProps &source, bool preserveExisting = false) {
    d_props.update(source.getDict(), preserveExisting);
  }
};
}  // namespace RDKit
#endif