| // |
| // Copyright (C) 2014 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #ifndef SHILL_PROPERTY_OBSERVER_INTERFACE_H_ |
| #define SHILL_PROPERTY_OBSERVER_INTERFACE_H_ |
| |
| #include <base/macros.h> |
| |
| namespace shill { |
| |
| // An abstract interface for objects that retain a saved copy of |
| // a property accessor and can report whether that value has changed. |
| class PropertyObserverInterface { |
| public: |
| PropertyObserverInterface() {} |
| virtual ~PropertyObserverInterface() {} |
| |
| // Update the saved value used for comparison. |
| virtual void Update() = 0; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(PropertyObserverInterface); |
| }; |
| |
| } // namespace shill |
| |
| #endif // SHILL_PROPERTY_OBSERVER_INTERFACE_H_ |