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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.
#ifndef I18N_ADDRESSINPUT_UTIL_JSON_H_
#define I18N_ADDRESSINPUT_UTIL_JSON_H_
#include <libaddressinput/util/basictypes.h>
#include <libaddressinput/util/scoped_ptr.h>
#include <string>
#include <vector>
namespace i18n {
namespace addressinput {
// Parses a JSON dictionary of strings. Sample usage:
// Json json;
// if (json.ParseObject("{'key1':'value1', 'key2':'value2'}") &&
// json.HasStringKey("key1")) {
// Process(json.GetStringValueForKey("key1"));
// }
class Json {
public:
Json();
~Json();
// Parses the |json| string and returns true if |json| is valid and it is an
// object.
bool ParseObject(const std::string& json);
// Returns the list of keys in the parsed JSON. The JSON object must be parsed
// successfully in ParseObject() before invoking this method.
const std::vector<std::string>& GetKeys() const;
// Returns true if the parsed JSON contains a string value for |key|. The JSON
// object must be parsed successfully in ParseObject() before invoking this
// method.
bool HasStringValueForKey(const std::string& key) const;
// Returns the string value for the |key|. The |key| must be present and its
// value must be of string type, i.e., HasStringValueForKey(key) must return
// true before invoking this method.
std::string GetStringValueForKey(const std::string& key) const;
// Returns true if the parsed JSON contains a dictionary value for |key|. The
// JSON object must be parsed successfully in ParseObject() before invoking
// this method.
bool HasDictionaryValueForKey(const std::string& key) const;
// Returns the dictionary value for the |key|. The |key| must be present and
// its value must be of the dictionary type, i.e., HasDictionaryValueForKey()
// must return true before invoking this method.
const Json& GetDictionaryValueForKey(const std::string& key) const;
private:
class JsonImpl;
scoped_ptr<JsonImpl> impl_;
DISALLOW_COPY_AND_ASSIGN(Json);
};
} // namespace addressinput
} // namespace i18n
#endif // I18N_ADDRESSINPUT_UTIL_JSON_H_
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