1 // Copyright (C) 2013 Google Inc. 2 // 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 // The interface to be implemented by the user of the library to enable storing 16 // the downloaded validation rules (e.g. on disk). 17 18 #ifndef I18N_ADDRESSINPUT_STORAGE_H_ 19 #define I18N_ADDRESSINPUT_STORAGE_H_ 20 21 #include <libaddressinput/callback.h> 22 #include <libaddressinput/util/scoped_ptr.h> 23 24 #include <string> 25 26 namespace i18n { 27 namespace addressinput { 28 29 // Stores downloaded validation rules. Sample usage: 30 // class MyStorage : public Storage { 31 // public: 32 // virtual void Put(const std::string& key, const std::string& data) { 33 // ... 34 // } 35 // 36 // virtual void Get(const std::string& key, 37 // scoped_ptr<Callback> data_ready) const { 38 // bool success = ... 39 // std::string data = ... 40 // (*data_ready)(success, key, data); 41 // } 42 // }; 43 class Storage { 44 public: 45 typedef i18n::addressinput::Callback<void(std::string, std::string)> Callback; 46 ~Storage()47 virtual ~Storage() {} 48 49 // Stores |data| for |key|. 50 virtual void Put(const std::string& key, scoped_ptr<std::string> data) = 0; 51 52 // Retrieves the data for |key| and invokes the |data_ready| callback. 53 virtual void Get(const std::string& key, 54 scoped_ptr<Callback> data_ready) const = 0; 55 }; 56 57 } // namespace addressinput 58 } // namespace i18n 59 60 #endif // I18N_ADDRESSINPUT_STORAGE_H_ 61