[rac] Temporarily copy libaddressinput to Chrome.

third_party/libaddressinput/chromium/cpp/src/rule_retriever.cc

+// 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