1 /* 2 * Copyright (c) 2022 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 FILEMGMT_LIBN_N_CLASS_H 17 #define FILEMGMT_LIBN_N_CLASS_H 18 19 #include <map> 20 #include <memory> 21 #include <mutex> 22 #include <string> 23 #include <tuple> 24 #include <vector> 25 26 #include "n_napi.h" 27 #include "filemgmt_libhilog.h" 28 29 namespace OHOS { 30 namespace FileManagement { 31 namespace LibN { 32 class NClass final { 33 public: 34 NClass(const NClass &) = delete; 35 NClass &operator=(const NClass &) = delete; 36 37 static std::tuple<bool, napi_value> DefineClass(napi_env env, 38 std::string className, 39 napi_callback constructor, 40 std::vector<napi_property_descriptor> &&properties); 41 static bool SaveClass(napi_env env, std::string className, napi_value exClass); 42 static napi_value InstantiateClass(napi_env env, const std::string& className, const std::vector<napi_value>& args); 43 GetEntityOf(napi_env env,napi_value objStat)44 template <class T> static T *GetEntityOf(napi_env env, napi_value objStat) 45 { 46 if (!env || !objStat) { 47 HILOGE("Empty input: env %d, obj %d", env == nullptr, objStat == nullptr); 48 return nullptr; 49 } 50 T *t = nullptr; 51 napi_status status = napi_unwrap(env, objStat, (void **)&t); 52 if (status != napi_ok) { 53 HILOGE("Cannot umwarp for pointer: %d", status); 54 return nullptr; 55 } 56 return t; 57 } 58 SetEntityFor(napi_env env,napi_value obj,std::unique_ptr<T> entity)59 template <class T> static bool SetEntityFor(napi_env env, napi_value obj, std::unique_ptr<T> entity) 60 { 61 napi_status status = napi_wrap( 62 env, obj, entity.get(), 63 [](napi_env env, void *data, void *hint) { 64 auto entity = static_cast<T *>(data); 65 delete entity; 66 }, 67 nullptr, nullptr); 68 entity.release(); 69 return status == napi_ok; 70 } 71 72 private: 73 NClass() = default; 74 ~NClass() = default; 75 static NClass &GetInstance(); 76 std::map<std::string, napi_ref> exClassMap; 77 std::mutex exClassMapLock; 78 }; 79 } // namespace LibN 80 } // namespace FileManagement 81 } // namespace OHOS 82 83 #endif // FILEMGMT_LIBN_N_CLASS_H