1 // 2 // Copyright (C) 2014 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #ifndef SHILL_PROPERTY_OBSERVER_INTERFACE_H_ 18 #define SHILL_PROPERTY_OBSERVER_INTERFACE_H_ 19 20 #include <base/macros.h> 21 22 namespace shill { 23 24 // An abstract interface for objects that retain a saved copy of 25 // a property accessor and can report whether that value has changed. 26 class PropertyObserverInterface { 27 public: 28 PropertyObserverInterface() {} 29 virtual ~PropertyObserverInterface() {} 30 31 // Update the saved value used for comparison. 32 virtual void Update() = 0; 33 34 private: 35 DISALLOW_COPY_AND_ASSIGN(PropertyObserverInterface); 36 }; 37 38 } // namespace shill 39 40 #endif // SHILL_PROPERTY_OBSERVER_INTERFACE_H_ 41
