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