src/gromacs/options/optionmanagercontainer.h

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  35 /*! \libinternal \file
  36  * \brief
  37  * Declares gmx::OptionManagerContainer.
  38  *
  39  * \author Teemu Murtola <teemu.murtola@gmail.com>
  40  * \inlibraryapi
  41  * \ingroup module_options
  42  */
  43 #ifndef GMX_OPTIONS_OPTIONMANAGERCONTAINER_H
  44 #define GMX_OPTIONS_OPTIONMANAGERCONTAINER_H
  45
  46 #include <vector>
  47
  48 #include "gromacs/utility/classhelpers.h"
  49 #include "gromacs/utility/gmxassert.h"
  50
  51 namespace gmx
  52 {
  53
  54 class IOptionManager;
  55
  56 /*! \libinternal
  57  * \brief
  58  * Container to keep managers added with Options::addManager() and pass them
  59  * to options.
  60  *
  61  * Consistency of the managers (e.g., that there is at most one manager of a
  62  * certain type) is only checked when the managers are accessed.
  63  *
  64  * \inlibraryapi
  65  * \ingroup module_options
  66  */
  67 class OptionManagerContainer
  68 {
  69     public:
  70         OptionManagerContainer()
  71         {
  72         }
  73
  74         //! Returns `true` if there are no managers.
  75         bool empty() const { return list_.empty(); }
  76
  77         //! Adds a manager to the container.
  78         void add(IOptionManager *manager)
  79         {
  80             list_.push_back(manager);
  81         }
  82         /*! \brief
  83          * Retrieves a manager of a certain type.
  84          *
  85          * \tparam  ManagerType  Type of manager to retrieve
  86          *     (should derive from IOptionManager).
  87          * \returns The manager, or `NULL` if there is none.
  88          *
  89          * This method is used in AbstractOption::createStorage() to retrieve
  90          * a manager of a certain type for options that use a manager.
  91          *
  92          * The return value is `NULL` if there is no manager of the given type.
  93          * The caller needs to handle this (either by asserting, or by handling
  94          * the manager as optional).
  95          */
  96         template <class ManagerType>
  97         ManagerType *get() const
  98         {
  99             ManagerType *result = nullptr;
 100             for (ListType::const_iterator i = list_.begin(); i != list_.end(); ++i)
 101             {
 102                 ManagerType *curr = dynamic_cast<ManagerType *>(*i);
 103                 if (curr != nullptr)
 104                 {
 105                     GMX_RELEASE_ASSERT(result == nullptr,
 106                                        "More than one applicable option manager is set");
 107                     result = curr;
 108                 }
 109             }
 110             return result;
 111         }
 112
 113     private:
 114         //! Shorthand for the internal container type.
 115         typedef std::vector<IOptionManager *> ListType;
 116
 117         ListType  list_;
 118
 119         GMX_DISALLOW_COPY_AND_ASSIGN(OptionManagerContainer);
 120 };
 121
 122 } // namespace gmx
 123
 124 #endif