display_factory.hpp

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// Copyright 2024 Kotaro Uetake.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#ifndef AWVIZ_COMMON__DISPLAY_FACTORY_HPP_
#define AWVIZ_COMMON__DISPLAY_FACTORY_HPP_
 
#include "awviz_common/display.hpp"
#include "awviz_common/factory/plugin_factory.hpp"
 
#include <tinyxml2.h>
 
#include <map>
#include <optional>
#include <set>
#include <string>
 
namespace awviz_common
{
 
class DisplayFactory : public PluginFactory<Display>
{
public:
  DisplayFactory();
 
  ~DisplayFactory() = default;
 
  const std::set<std::string> & get_message_types(const std::string & lookup_name);
 
  std::optional<std::string> get_class_lookup_name(const std::string & msg_type) const;
 
public:
  static constexpr const char * LIBRARY_TAG = "library";            
  static constexpr const char * CLASS_TAG = "class";                
  static constexpr const char * MESSAGE_TYPE_TAG = "message_type";  
  static constexpr const char * TYPE_ATTRIBUTE = "type";            
  static constexpr const char * NAME_ATTRIBUTE = "name";            
 
private:
  bool has_root_node(const tinyxml2::XMLElement * element) const;
 
  bool has_library_root(const tinyxml2::XMLElement * element) const;
 
  void cache_classes(const tinyxml2::XMLElement * library);
 
  std::set<std::string> parse_message_types(const tinyxml2::XMLElement * element) const;
 
  std::string lookup_derived_class(const tinyxml2::XMLElement * element) const;
 
  std::string lookup_class_id(
    const tinyxml2::XMLElement * element, const std::string & derived) const;
 
private:
  std::map<std::string, std::set<std::string>>
    msg_type_buffer_;  
};
}  // namespace awviz_common
#endif  // AWVIZ_COMMON__DISPLAY_FACTORY_HPP_