chromium/third_party/libaddressinput/src/cpp/src/validating_storage.h

// Copyright (C) 2013 Google Inc.
//
// 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.
//
// A wrapper object for Storage that stores data with a checksum and a
// timestamp. The existence of checksum and timestamp fields is transparent to
// the user of the object.

#ifndef I18N_ADDRESSINPUT_VALIDATING_STORAGE_H_
#define I18N_ADDRESSINPUT_VALIDATING_STORAGE_H_

#include <libaddressinput/storage.h>

#include <memory>
#include <string>

namespace i18n {
namespace addressinput {

// Wraps Storage to add checksum and timestamp to stored data. Sample usage:
//    std::unique_ptr<Storage> file_storage = ...;
//    ValidatingStorage storage(file_storage));
//    storage.Put("key", new std::string("data"));
//    const std::unique_ptr<const ValidatingStorage::Callback> data_ready(
//        BuildCallback(this, &MyClass::OnDataReady));
//    storage.Get("key", *data_ready);
class ValidatingStorage : public Storage { … };

}  // namespace addressinput
}  // namespace i18n

#endif  // I18N_ADDRESSINPUT_VALIDATING_STORAGE_H_