1 /* 2 * Copyright (c) 2023 Shenzhen Kaihong Digital Industry Development Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef OHOS_SHARING_REFLECT_REGISTRATION_H 17 #define OHOS_SHARING_REFLECT_REGISTRATION_H 18 19 #include <atomic> 20 #include <functional> 21 #include <mutex> 22 #include <singleton.h> 23 #include <string> 24 #include <unordered_map> 25 26 namespace OHOS { 27 namespace Sharing { 28 29 using Constructor = std::function<std::shared_ptr<void>()>; 30 31 class ReflectRegistration : public Singleton<ReflectRegistration> { 32 friend class Singleton<ReflectRegistration>; 33 34 public: 35 ReflectRegistration() = default; ReflectRegistration(ReflectRegistration && ref)36 explicit ReflectRegistration(ReflectRegistration &&ref) {} ReflectRegistration(const ReflectRegistration & ref)37 explicit ReflectRegistration(const ReflectRegistration &ref) {} 38 ~ReflectRegistration(); 39 40 void Unregister(const std::string &descriptor); 41 bool Register(const std::string &descriptor, Constructor creator); 42 std::shared_ptr<void> CreateObject(const std::string &descriptor); 43 44 private: 45 ReflectRegistration &operator=(ReflectRegistration &&) = delete; 46 ReflectRegistration &operator=(const ReflectRegistration &) = delete; 47 48 private: 49 std::mutex creatorMutex_; 50 std::unordered_map<std::string, Constructor> creators_; 51 }; 52 53 class ReflectClassRegister { 54 public: ReflectClassRegister(const std::string & name,Constructor func)55 ReflectClassRegister(const std::string &name, Constructor func) 56 { 57 ReflectRegistration::GetInstance().Register(name, func); 58 }; 59 60 private: 61 ReflectClassRegister() = delete; 62 }; 63 64 #define REGISTER_CLASS_REFLECTOR(className) \ 65 static std::shared_ptr<className> className##Creator(void) \ 66 { \ 67 auto obj = std::make_shared<className>(); \ 68 obj->SetClassName(#className); \ 69 return obj; \ 70 } \ 71 const ReflectClassRegister className##Register(#className, className##Creator) 72 73 template <class T> 74 class ClassReflector { 75 public: Class2Instance(const std::string & name)76 static std::shared_ptr<T> Class2Instance(const std::string &name) 77 { 78 return std::static_pointer_cast<T>(ReflectRegistration::GetInstance().CreateObject(name)); 79 }; 80 }; 81 82 } // namespace Sharing 83 } // namespace OHOS 84 #endif