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// 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.
#include "rule_retriever.h"
#include <libaddressinput/callback.h>
#include <libaddressinput/util/basictypes.h>
#include <libaddressinput/util/scoped_ptr.h>
#include <cassert>
#include <cstddef>
#include <string>
#include "retriever.h"
#include "rule.h"
namespace i18n {
namespace addressinput {
namespace {
class Helper {
public:
Helper(const std::string& key,
const RuleRetriever::Callback& rule_ready,
const Retriever& data_retriever)
: rule_ready_(rule_ready),
data_retrieved_(BuildCallback(this, &Helper::OnDataRetrieved)) {
data_retriever.Retrieve(key, *data_retrieved_);
}
private:
~Helper() {}
void OnDataRetrieved(bool success,
const std::string& key,
const std::string& data) {
Rule rule;
if (!success) {
rule_ready_(false, key, rule);
} else {
success = rule.ParseSerializedRule(data);
rule_ready_(success, key, rule);
}
delete this;
}
const RuleRetriever::Callback& rule_ready_;
scoped_ptr<Retriever::Callback> data_retrieved_;
DISALLOW_COPY_AND_ASSIGN(Helper);
};
} // namespace
RuleRetriever::RuleRetriever(const Retriever* retriever)
: data_retriever_(retriever) {
assert(data_retriever_ != NULL);
}
RuleRetriever::~RuleRetriever() {}
void RuleRetriever::RetrieveRule(const std::string& key,
const Callback& rule_ready) const {
new Helper(key, rule_ready, *data_retriever_);
}
} // namespace addressinput
} // namespace i18n
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