1 /*
2  * Copyright (c) 2024 Huawei Device 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 UDMF_GETTER_SYSTEM_H
17 #define UDMF_GETTER_SYSTEM_H
18 
19 #include "concurrent_map.h"
20 #include "unified_meta.h"
21 #include "visibility.h"
22 
23 namespace OHOS {
24 namespace UDMF {
25 class API_EXPORT GetterSystem {
26 public:
27     class API_EXPORT GeneralGetter {
28     public:
29         virtual ~GeneralGetter();
30         virtual ValueType GetValueByType(uint32_t dataId, uint32_t recordId, const std::string &utdId);
31     };
32     using Creator = std::function<std::shared_ptr<GeneralGetter>()>;
33     using Getter = std::shared_ptr<GeneralGetter>;
34     static GetterSystem &GetInstance();
35     void RegisterCreator(const std::string& name, Creator creator);
36     Getter GetGetter(const std::string& name);
37 private:
38     GetterSystem() = default;
39     GetterSystem(const GetterSystem &) = delete;
40     GetterSystem(GetterSystem &&) noexcept = delete;
41     GetterSystem &operator=(const GetterSystem &) = delete;
42     GetterSystem &operator=(GetterSystem &&) = delete;
43     ConcurrentMap<std::string, Creator> creators_;
44 };
45 } // namespace UDMF
46 } // namespace OHOS
47 #endif // UDMF_GETTER_SYSTEM_H