// 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.
#ifndef I18N_ADDRESSINPUT_UTIL_JSON_H_
#define I18N_ADDRESSINPUT_UTIL_JSON_H_
#include <libaddressinput/util/scoped_ptr.h>
#include <string>
namespace i18n {
namespace addressinput {
// Parses a JSON dictionary of strings. Sample usage:
// scoped_ptr<Json> json(Json::Build());
// std::string value;
// if (json->ParseObject("{'key1':'value1', 'key2':'value2'}") &&
// json->GetStringValueForKey("key1", &value)) {
// Process(value);
// }
class Json {
public:
virtual ~Json();
// Returns a new instance of |Json| object.
static scoped_ptr<Json> Build();
// Parses the |json| string and returns true if |json| is valid and it is an
// object.
virtual bool ParseObject(const std::string& json) = 0;
// Sets |value| to the string for |key| if it exists and has a string value.
// Returns false if the key doesn't exist or doesn't correspond to a string.
// The JSON object must be parsed successfully in ParseObject() before
// invoking this method.
virtual bool GetStringValueForKey(const std::string& key,
std::string* value) const = 0;
// Sets |value| to the dictionary for |key| if it exists and has a dictionary
// value. Returns false if the key doesn't exist or doesn't correspond to a
// dictionary. The JSON object must be parsed successfully in ParseObject()
// before invoking this method. |value| is only guaranteed to be valid as long
// as |this| is valid.
virtual bool GetJsonValueForKey(const std::string& key,
scoped_ptr<Json>* value) const = 0;
protected:
Json();
};
} // namespace addressinput
} // namespace i18n
#endif // I18N_ADDRESSINPUT_UTIL_JSON_H_