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 NOTIFICATION_ADVANCED_DATASHAER_OBSERVER_H 17 #define NOTIFICATION_ADVANCED_DATASHAER_OBSERVER_H 18 19 #include "datashare_helper.h" 20 #include "iremote_broker.h" 21 #include "singleton.h" 22 #include "ans_const_define.h" 23 #include "system_ability_definition.h" 24 #include "uri.h" 25 #include "ffrt.h" 26 27 namespace OHOS { 28 namespace Notification { 29 namespace { 30 31 } // namespace 32 33 class AdvancedDatashareObserver : public Singleton<AdvancedDatashareObserver> { 34 DECLARE_SINGLETON(AdvancedDatashareObserver); 35 public: 36 /** 37 * Registers an observer to DataObsMgr specified by the given Uri. 38 * 39 * @param uri, Indicates the path of the data to operate. 40 * @param dataObserver, Indicates the IDataAbilityObserver object. 41 */ 42 void RegisterSettingsObserver(const Uri &uri, const sptr<AAFwk::IDataAbilityObserver> &dataObserver); 43 44 /** 45 * Deregisters an observer used for DataObsMgr specified by the given Uri. 46 * 47 * @param uri, Indicates the path of the data to operate. 48 * @param dataObserver, Indicates the IDataAbilityObserver object. 49 */ 50 void UnRegisterSettingsObserver(const Uri &uri, const sptr<AAFwk::IDataAbilityObserver> &dataObserver); 51 52 /** 53 * Notifies the registered observers of a change to the data resource specified by Uri. 54 * 55 * @param uri, Indicates the path of the data to operate. 56 */ 57 void NotifyChange(const Uri &uri); 58 59 bool CheckIfSettingsDataReady(); 60 61 private: 62 std::shared_ptr<DataShare::DataShareHelper> CreateDataShareHelper(); 63 static sptr<AdvancedDatashareObserver> instance_; 64 static ffrt::mutex instanceMutex_; 65 bool isDataShareReady_ = false; 66 }; 67 } // namespace Notification 68 } // namespace OHOS 69 #endif // NOTIFICATION_ADVANCED_DATASHAER_OBSERVER_H 70