1 // Copyright (C) 2014 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 #ifndef I18N_ADDRESSINPUT_ONDEMAND_SUPPLY_TASK_H_ 16 #define I18N_ADDRESSINPUT_ONDEMAND_SUPPLY_TASK_H_ 17 18 #include <libaddressinput/supplier.h> 19 #include <libaddressinput/util/basictypes.h> 20 #include <libaddressinput/util/scoped_ptr.h> 21 22 #include <map> 23 #include <set> 24 #include <string> 25 26 #include "retriever.h" 27 28 namespace i18n { 29 namespace addressinput { 30 31 class LookupKey; 32 class Retriever; 33 class Rule; 34 35 // An OndemandSupplyTask object encapsulates the information necessary to 36 // retrieve the set of Rule objects corresponding to a LookupKey and call a 37 // callback when that has been done. Calling the Retrieve() method will load 38 // required metadata, then call the callback and delete the OndemandSupplyTask 39 // object itself. 40 class OndemandSupplyTask { 41 public: 42 OndemandSupplyTask(const LookupKey& lookup_key, 43 std::map<std::string, const Rule*>* rules, 44 const Supplier::Callback& supplied); 45 ~OndemandSupplyTask(); 46 47 // Adds lookup key string |key| to the queue of data to be retrieved. 48 void Queue(const std::string& key); 49 50 // Retrieves and parses data for all queued keys, then calls |supplied_|. 51 void Retrieve(const Retriever& retriever); 52 53 Supplier::RuleHierarchy hierarchy_; 54 55 private: 56 void Load(bool success, const std::string& key, const std::string& data); 57 void Loaded(); 58 59 std::set<std::string> pending_; 60 const LookupKey& lookup_key_; 61 std::map<std::string, const Rule*>* const rule_cache_; 62 const Supplier::Callback& supplied_; 63 const scoped_ptr<const Retriever::Callback> retrieved_; 64 bool success_; 65 66 DISALLOW_COPY_AND_ASSIGN(OndemandSupplyTask); 67 }; 68 69 } // namespace addressinput 70 } // namespace i18n 71 72 #endif // I18N_ADDRESSINPUT_ONDEMAND_SUPPLY_TASK_H_ 73
