blob: 75cbbc610ee965b9e7fd2933f421c114e40d3eed [file] [log] [blame]
// Copyright (C) 2014 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.
#ifndef I18N_ADDRESSINPUT_ONDEMAND_SUPPLY_TASK_H_
#define I18N_ADDRESSINPUT_ONDEMAND_SUPPLY_TASK_H_
#include <libaddressinput/supplier.h>
#include <map>
#include <memory>
#include <set>
#include <string>
#include "retriever.h"
namespace i18n {
namespace addressinput {
class LookupKey;
class Rule;
// An OndemandSupplyTask object encapsulates the information necessary to
// retrieve the set of Rule objects corresponding to a LookupKey and call a
// callback when that has been done. Calling the Retrieve() method will load
// required metadata, then call the callback and delete the OndemandSupplyTask
// object itself.
class OndemandSupplyTask {
public:
OndemandSupplyTask(const OndemandSupplyTask&) = delete;
OndemandSupplyTask& operator=(const OndemandSupplyTask&) = delete;
OndemandSupplyTask(const LookupKey& lookup_key,
std::map<std::string, const Rule*>* rules,
const Supplier::Callback& supplied);
~OndemandSupplyTask();
// Adds lookup key string |key| to the queue of data to be retrieved.
void Queue(const std::string& key);
// Retrieves and parses data for all queued keys, then calls |supplied_|.
void Retrieve(const Retriever& retriever);
Supplier::RuleHierarchy hierarchy_;
private:
void Load(bool success, const std::string& key, const std::string& data);
void Loaded();
std::set<std::string> pending_;
const LookupKey& lookup_key_;
std::map<std::string, const Rule*>* const rule_cache_;
const Supplier::Callback& supplied_;
const std::unique_ptr<const Retriever::Callback> retrieved_;
bool success_;
};
} // namespace addressinput
} // namespace i18n
#endif // I18N_ADDRESSINPUT_ONDEMAND_SUPPLY_TASK_H_