C++ json类代码示例

void from_json(const json& j, ToolConfig& a) {
    std::vector<std::string>& files = a.getSourceFiles();
    try {
        files = j.at("source_files").get<std::vector<std::string>>();
    } catch (...) {
        files = {};
    }

    try {
        a.setExecutable(j.at("executable"));
    } catch (...) {
        a.setExecutable("");
    }

    try {
        a.setToolID(j.at("tool_id"));
    } catch (...) {
        a.setToolID("None");
    }

    try {
        a.setVersion(j.at("version"));
    } catch (...) {
        a.setVersion(newVersion);
    }

    std::vector<ToolAction>& actions = a.getActions();
    try {
        actions = j.at("actions").get<std::vector<ToolAction>>();
    } catch (...) {
        actions = {};
    }
}

void read_message(int clientID, string message){
    
    // Deserialize message from the string
    json msg = json::parse(message);
    
    if (msg["MESSAGE_TYPE"] == "CLIENT_UPDATE") {
        
        // Send a time stamp reply for client-side latency estimation
        json tStamps;
		tStamps["MESSAGE_TYPE"] = "TIME_STAMP_REPLY";
        tStamps["T2"] = chrono::system_clock::now().time_since_epoch() / chrono::milliseconds(1); // Time received
        tStamps["T1"] = msg["TIME_STAMP"]; // Origination time
        send_message(clientID, tStamps);
        
        // Now, process the client update:
        // Scenario A: We don't have a game ready yet. This is a pre-game message.
        if (game_p == NULL) {
            
            // Step 1: Put the message in the correct bin.
            pregame_player_msgs[clientID] = msg;
            
            // Step 2: If both bins are filled (2 players ready),
            // then start a new game.
            if (pregame_player_msgs.size() == 2) {
                game_p = new SnakeGame(pregame_player_msgs[0], pregame_player_msgs[1]);
                pregame_player_msgs.clear();
            }
        }
        
        // Scenario B: A game already exists. Just forward the message to it.
        else {
            game_p->handleClientInput(msg);
        }
    }
}

 json merge(const json &a, const json &b) {
     json result = a.flatten();
     json tmp = b.flatten();
     for ( auto it = tmp.begin(); it != tmp.end(); ++it )
         result[it.key()] = it.value();
     return result.unflatten();
 }

 void from_json(const json &j, AtomData &a) {
     if (j.is_object()==false || j.size()!=1)
         throw std::runtime_error("Invalid JSON data for AtomData");
     for (auto it : j.items()) {
         a.name = it.key();
         auto& val = it.value();
         a.activity = val.value("activity", a.activity) * 1.0_molar;
         a.alphax   = val.value("alphax", a.alphax);
         a.charge   = val.value("q", a.charge);
         a.dp       = val.value("dp", a.dp) * 1.0_angstrom;
         a.dprot    = val.value("dprot", a.dprot) * 1.0_rad;
         a.eps      = val.value("eps", a.eps) * 1.0_kJmol;
         a.id()     = val.value("id", a.id());
         a.mu       = val.value("mu", a.mu);
         a.mulen    = val.value("mulen", a.mulen);
         a.scdir    = val.value("scdir", a.scdir);
         a.sclen    = val.value("sclen", a.sclen);
         a.mw       = val.value("mw", a.mw);
         a.sigma    = val.value("sigma", 0.0) * 1.0_angstrom;
         if (fabs(a.sigma)<1e-20)
             a.sigma = 2.0*val.value("r", 0.0) * 1.0_angstrom;
         a.tension  = val.value("tension", a.tension) * 1.0_kJmol / (1.0_angstrom*1.0_angstrom);
         a.tfe      = val.value("tfe", a.tfe) * 1.0_kJmol / (1.0_angstrom*1.0_angstrom*1.0_molar);
         a.hydrophobic = val.value("hydrophobic", false);
     }
 }

void Colour::fromJSON(json& jvalue)
{
  //Will accept integer colour or [r,g,b,a] array or 
  // string containing x11 name or hex #rrggbb or html rgba(r,g,b,a) 
  if (jvalue.is_number())
  {
    value = jvalue;
  }
  else if (jvalue.is_array())
  {
    float R = jvalue[0];
    float G = jvalue[1];
    float B = jvalue[2];
    float A = 1.0;
    if (jvalue.size() > 3) A = jvalue[3];
    if (R <= 1.0 && G <= 1.0 && B <= 1.0 && A <= 1.0)
    {
      r = R*255.0;
      g = G*255.0;
      b = B*255.0;
      a = A*255.0;
    }
    else
    {
      r = R;
      g = G;
      b = B;
    }
  }
  else if (jvalue.is_string())
  {
    fromString(jvalue);
  }
  //std::cout << "COLOUR: " << std::setw(2) << jvalue << " ==> " << *this << std::endl;
}

void LogEntryRootFilter::parseJson(const json &j) {
    auto filterType_json = j.find("filterType");
    if (filterType_json != j.end()) {
        filterType = (FilterType) filterType_json->get<int>();
    } else {
        filterType = filterIn;
    }
}

	void JsonUtil::ensureType(const string& aFieldName, const json& aNew, const json& aExisting) {
		if (aExisting.is_number()) {
			if (!aNew.is_number()) {
				throwError(aFieldName, ERROR_INVALID, "The new value must be a number");
			}
		} else if (aNew.type() != aExisting.type()) {
			throwError(aFieldName, ERROR_INVALID, "Type of the new value doesn't match with the existing type");
		}
	}

QM_NAMESPACE

boost::python::dict to_dict(json const& self)  {
	boost::python::dict d;
	for(json::const_iterator it=self.begin();it!=self.end();++it)  {
		d[it->first] = it->second;
	}
	return d;
}

std::shared_ptr<dariadb::MeasArray>
read_meas_array(const dariadb::scheme::IScheme_Ptr &scheme, const json &js) {
  auto result = std::make_shared<dariadb::MeasArray>();
  auto js_iter = js.find("append_values");
  if (js_iter == js.end()) {
    dariadb::logger_fatal("append_values not found");
    return nullptr;
  }

  auto values = *js_iter;
  for (auto it = values.begin(); it != values.end(); ++it) {
    dariadb::MeasArray sub_result;
    auto id_str = it.key();
    auto val4id = it.value();

    dariadb::Id id = scheme->addParam(id_str);

    auto flag_js = val4id["F"];
    auto val_js = val4id["V"];
    auto time_js = val4id["T"];

    if (flag_js.size() != val_js.size() || time_js.size() != val_js.size()) {
      THROW_EXCEPTION("bad query format, flags:", flag_js.size(),
                      " values:", val_js.size(), " times:", time_js.size(),
                      " query: ", js.dump(1));
    }

    sub_result.resize(flag_js.size());
    size_t pos = 0;
    for (auto f_it = flag_js.begin(); f_it != flag_js.end(); ++f_it) {
      dariadb::Flag f = *f_it;
      sub_result[pos++].flag = f;
    }

    pos = 0;
    for (auto v_it = val_js.begin(); v_it != val_js.end(); ++v_it) {
      dariadb::Value v = *v_it;
      sub_result[pos++].value = v;
    }

    pos = 0;
    for (auto t_it = time_js.begin(); t_it != time_js.end(); ++t_it) {
      dariadb::Time t = *t_it;
      sub_result[pos++].time = t;
    }

    dariadb::logger("in query ", sub_result.size(), " values for id:", id);
    for (auto v : sub_result) {
      v.id = id;
      result->push_back(v);
    }
  }
  return result;
}

RenderableSpriteBlueprint::RenderableSpriteBlueprint(json& j) {
    if (j.count("diffuse")) {
        _diffuse = j["diffuse"].get<std::string>();
    }
    if (j.count("normal")) {
        _normal = j["normal"].get<std::string>();
    }
    if (j.count("lit")) {
        _lit = j["lit"].get<bool>();
    }
}

	json JsonUtil::filterExactValues(const json& aNew, const json& aCompareTo) noexcept {
		json ret = aNew;
		for (const auto& v: json::iterator_wrapper(aCompareTo)) {
			auto key = v.key();
			auto i = aNew.find(key);
			if (i != aNew.end() && aNew.at(key) == aCompareTo.at(key)) {
				ret.erase(key);
			}
		}

		return ret;
	}

	optional<int> FavoriteHubUtils::deserializeIntHubSetting(const string& aFieldName, const json& aJson) {
		auto p = aJson.find(aFieldName);
		if (p == aJson.end()) {
			return boost::none;
		}

		if ((*p).is_null()) {
			return HUB_SETTING_DEFAULT_INT;
		}

		return JsonUtil::parseValue<int>(aFieldName, *p);
	}

bool RPCMethod::ValidateArguments(json j) {
  if (j.size() != this->paramTypes->size()) {
    return false;
  }

  for (unsigned int c = 0; c < this->paramTypes->size(); c++) {
    if (!this->checkType(this->paramTypes->at(c), j.at(c))) {
      return false;
    }
  }
  return true;
}

RenderableBackgroundBlueprint::RenderableBackgroundBlueprint(json& j) {
    if (j.count("diffuse")) {
        _diffuse = j["diffuse"].get<std::string>();
    }
    if (j.count("normal")) {
        _normal = j["normal"].get<std::string>();
    }
    if (j.count("scale")) {
        _scale = j["scale"].get<float>();
    } else {
        _scale = 1;
    }
}

LightBlueprint::LightBlueprint(json& j) {
    _type = j["type"];

    if (j.count("x")) _x = j["x"].get<float>();
    if (j.count("y")) _y = j["y"].get<float>();
    if (j.count("z")) _z = j["z"].get<float>();
    if (j.count("drop")) _drop = j["drop"].get<float>();
    if (j.count("end")) _end = j["end"].get<float>();
    if (j.count("depth")) _depth = j["depth"].get<float>();
    if (j.count("color")) {
        _color = Color(j["color"][0], j["color"][1], j["color"][2]);
    }
}