DataTypeRegistry.h

Go to the documentation of this file.

/******************************************************************************
 * Copyright (C) 2014 by Ralf Kaestner                                        *
 * ralf.kaestner@gmail.com                                                    *
 *                                                                            *
 * This program is free software; you can redistribute it and/or modify       *
 * it under the terms of the Lesser GNU General Public License as published by*
 * the Free Software Foundation; either version 3 of the License, or          *
 * (at your option) any later version.                                        *
 *                                                                            *
 * This program is distributed in the hope that it will be useful,            *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the               *
 * Lesser GNU General Public License for more details.                        *
 *                                                                            *
 * You should have received a copy of the Lesser GNU General Public License   *
 * along with this program. If not, see <http://www.gnu.org/licenses/>.       *
 ******************************************************************************/

#ifndef VARIANT_TOPIC_TOOLS_DATA_TYPE_REGISTRY_H
#define VARIANT_TOPIC_TOOLS_DATA_TYPE_REGISTRY_H

#include <typeinfo>

#include <boost/unordered_map.hpp>
#include <boost/type_traits.hpp>

#include <variant_topic_tools/DataTypeTraits.h>
#include <variant_topic_tools/Forwards.h>
#include <variant_topic_tools/MessageFieldCollection.h>
#include <variant_topic_tools/TypeInfoHash.h>

namespace variant_topic_tools {
  class DataTypeRegistry {
  friend class DataType;
  public:
    DataTypeRegistry();
    
    ~DataTypeRegistry();

    DataType getDataType(const std::string& identifier);

    DataType getDataType(const std::string& identifier) const;
    
    DataType getDataType(const std::type_info& typeInfo) const;
    
    template <typename T> DataType getDataType();
    
    template <typename T> DataType getDataType() const;
    
    void write(std::ostream& stream) const;
    
    DataType operator[](const std::string& identifier);
    
    DataType operator[](const std::string& identifier) const;
    
    DataType operator[](const std::type_info& typeInfo) const;
    
    ArrayDataType addArrayDataType(const DataType& memberType, size_t
      numMembers = 0);
    
    template <typename T> ArrayDataType addArrayDataType();
    
    template <typename T, size_t N> ArrayDataType addArrayDataType();
    
    template <typename T> BuiltinDataType addBuiltinDataType(const
      std::string& identifier);
    
    MessageDataType addMessageDataType(const std::string& identifier,
      const MessageFieldCollection<MessageConstant>&
      constantMembers = MessageFieldCollection<MessageConstant>(),
      const MessageFieldCollection<MessageVariable>&
      variableMembers = MessageFieldCollection<MessageVariable>());
    
    MessageDataType addMessageDataType(const std::string&
      identifier, const std::string& definition);
    
    template <typename T> MessageDataType addMessageDataType();
    
    void addDataType(const DataType& dataType);
    
    template <typename T> void addDataType();
    
    void removeDataType(const DataType& dataType);
    
    void clear();
    
  protected:
    class Impl {
    public:
      Impl();
      
      ~Impl();
      
      boost::unordered_map<std::string, DataType> dataTypesByIdentifier;
      
      boost::unordered_multimap<const std::type_info*, DataType, TypeInfoHash>
        dataTypesByInfo;
   };
    
    typedef boost::shared_ptr<Impl> ImplPtr;
    
    typedef boost::weak_ptr<Impl> ImplWPtr;
    
    static ImplPtr impl;
    
    template <typename T> static BuiltinDataType createDataType(typename
      boost::enable_if<type_traits::IsBuiltin<T> >::type* = 0);
    
    template <typename T> static ArrayDataType createDataType(typename
      boost::enable_if<type_traits::IsArray<T> >::type* = 0);
    
    template <typename T> static MessageDataType createDataType(typename
      boost::enable_if<type_traits::IsMessage<T> >::type* = 0);      
  };
    
  std::ostream& operator<<(std::ostream& stream, const DataTypeRegistry&
    dataTypeRegistry);
};

#include <variant_topic_tools/DataTypeRegistry.tpp>

#endif