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 static std::tuple<bool, napi_value> DefineClass(napi_env env, 37 std::string className, 38 napi_callback constructor, 39 std::vector<napi_property_descriptor> &&properties); 40 static bool SaveClass(napi_env env, std::string className, napi_value exClass); 41 static napi_value InstantiateClass(napi_env env, const std::string& className, const std::vector<napi_value>& args); 42 GetEntityOf(napi_env env,napi_value objStat)43 template <class T> static T *GetEntityOf(napi_env env, napi_value objStat) 44 { 45 if (!env || !objStat) { 46 HILOGE("Empty input: env %d, obj %d", env == nullptr, objStat == nullptr); 47 return nullptr; 48 } 49 T *t = nullptr; 50 napi_status status = napi_unwrap(env, objStat, (void **)&t); 51 if (status != napi_ok) { 52 HILOGE("Cannot umwarp for pointer: %d", status); 53 return nullptr; 54 } 55 return t; 56 } 57 SetEntityFor(napi_env env,napi_value obj,std::unique_ptr<T> entity)58 template <class T> static bool SetEntityFor(napi_env env, napi_value obj, std::unique_ptr<T> entity) 59 { 60 napi_status status = napi_wrap( 61 env, obj, entity.get(), 62 [](napi_env env, void *data, void *hint) { 63 auto entity = static_cast<T *>(data); 64 delete entity; 65 }, 66 nullptr, nullptr); 67 entity.release(); 68 return status == napi_ok; 69 } 70 RemoveEntityOfFinal(napi_env env,napi_value objStat)71 template <class T> static T *RemoveEntityOfFinal(napi_env env, napi_value objStat) 72 { 73 if (!env || !objStat) { 74 HILOGD("Empty input: env %d,obj %d", env == nullptr, objStat == nullptr); 75 return nullptr; 76 } 77 T *t = nullptr; 78 napi_status status = napi_remove_wrap(env, objStat, (void **)&t); 79 if (status != napi_ok) { 80 HILOGD("Cannot umwrap for pointer: %d", status); 81 return nullptr; 82 } 83 return t; 84 } 85 86 private: 87 NClass() = default; 88 ~NClass() = default; 89 static NClass &GetInstance(); 90 std::map<std::string, napi_ref> exClassMap; 91 std::mutex exClassMapLock; 92 }; 93 } // namespace LibN 94 } // namespace FileManagement 95 } // namespace OHOS 96 97 #endif // FILEMGMT_LIBN_N_CLASS_H 98