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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/libaddressinput/src/cpp/src/util/json.h"
#include <map>
#include <utility>
#include "base/basictypes.h"
#include "base/json/json_reader.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
#include "base/values.h"
namespace i18n {
namespace addressinput {
namespace {
// Returns |json| parsed into a JSON dictionary. Sets |parser_error| to true if
// parsing failed.
::scoped_ptr<const base::DictionaryValue> Parse(const std::string& json,
bool* parser_error) {
DCHECK(parser_error);
::scoped_ptr<const base::DictionaryValue> result;
// |json| is converted to a |c_str()| here because rapidjson and other parts
// of the standalone library use char* rather than std::string.
::scoped_ptr<const base::Value> parsed(base::JSONReader::Read(json.c_str()));
*parser_error = !parsed || !parsed->IsType(base::Value::TYPE_DICTIONARY);
if (*parser_error)
result.reset(new base::DictionaryValue);
else
result.reset(static_cast<const base::DictionaryValue*>(parsed.release()));
return result.Pass();
}
// Returns the list of keys in |dict|.
std::vector<std::string> GetKeysFromDictionary(
const base::DictionaryValue& dict) {
std::vector<std::string> keys;
for (base::DictionaryValue::Iterator it(dict); !it.IsAtEnd(); it.Advance())
keys.push_back(it.key());
return keys;
}
} // namespace
// Implementation of JSON parser for libaddressinput using JSON parser in
// Chrome.
class Json::JsonImpl {
public:
explicit JsonImpl(const std::string& json)
: owned_(Parse(json, &parser_error_)),
dict_(*owned_),
keys_(GetKeysFromDictionary(dict_)) {}
~JsonImpl() { STLDeleteValues(&sub_dicts_); }
bool parser_error() const { return parser_error_; }
const std::vector<std::string>& keys() const { return keys_; }
bool GetStringValueForKey(const std::string& key, std::string* value) const {
return dict_.GetStringWithoutPathExpansion(key, value);
}
bool HasDictionaryValueForKey(const std::string& key) {
return !!FindDictionary(key);
}
const Json& GetDictionaryValueForKey(const std::string& key) {
const Json* result = FindDictionary(key);
DCHECK(result);
return *result;
}
private:
explicit JsonImpl(const base::DictionaryValue& dict)
: parser_error_(false), dict_(dict), keys_(GetKeysFromDictionary(dict)) {}
// The caller does not own the returned value, which can be NULL if there's no
// dictionary for |key|.
const Json* FindDictionary(const std::string& key) {
std::map<std::string, Json*>::const_iterator it = sub_dicts_.find(key);
if (it != sub_dicts_.end())
return it->second;
const base::DictionaryValue* sub_dict = NULL;
if (!dict_.GetDictionaryWithoutPathExpansion(key, &sub_dict) || !sub_dict)
return NULL;
std::pair<std::map<std::string, Json*>::iterator, bool> result =
sub_dicts_.insert(std::make_pair(key, new Json));
DCHECK(result.second);
Json* sub_json = result.first->second;
sub_json->impl_.reset(new JsonImpl(*sub_dict));
return sub_json;
}
const ::scoped_ptr<const base::DictionaryValue> owned_;
bool parser_error_;
const base::DictionaryValue& dict_;
const std::vector<std::string> keys_;
std::map<std::string, Json*> sub_dicts_;
DISALLOW_COPY_AND_ASSIGN(JsonImpl);
};
Json::Json() {}
Json::~Json() {}
bool Json::ParseObject(const std::string& json) {
DCHECK(!impl_);
impl_.reset(new JsonImpl(json));
if (impl_->parser_error())
impl_.reset();
return !!impl_;
}
const std::vector<std::string>& Json::GetKeys() const {
return impl_->keys();
}
bool Json::GetStringValueForKey(const std::string& key,
std::string* value) const {
return impl_->GetStringValueForKey(key, value);
}
bool Json::HasDictionaryValueForKey(const std::string& key) const {
return impl_->HasDictionaryValueForKey(key);
}
const Json& Json::GetDictionaryValueForKey(const std::string& key) const {
return impl_->GetDictionaryValueForKey(key);
}
} // namespace addressinput
} // namespace i18n
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