icinga2/lib/base/serializer.cpp

238 lines
6.2 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "base/serializer.h"
#include "base/type.h"
#include "base/application.h"
#include "base/objectlock.h"
#include <boost/foreach.hpp>
#include <cJSON.h>
using namespace icinga;
/**
* Serializes a Value into a JSON string.
*
* @returns A string representing the Value.
*/
String icinga::JsonSerialize(const Value& value)
{
cJSON *json = value.ToJson();
char *jsonString;
if (Application::IsDebugging())
jsonString = cJSON_Print(json);
else
jsonString = cJSON_PrintUnformatted(json);
cJSON_Delete(json);
String result = jsonString;
free(jsonString);
return result;
}
/**
* Deserializes the string representation of a Value.
*
* @param data A JSON string obtained from JsonSerialize
* @returns The newly deserialized Value.
*/
Value icinga::JsonDeserialize(const String& data)
{
cJSON *json = cJSON_Parse(data.CStr());
if (!json)
BOOST_THROW_EXCEPTION(std::runtime_error("Invalid JSON String: " + data));
Value value = Value::FromJson(json);
cJSON_Delete(json);
return value;
}
static Array::Ptr SerializeArray(const Array::Ptr& input, int attributeTypes)
{
Array::Ptr result = make_shared<Array>();
ObjectLock olock(input);
BOOST_FOREACH(const Value& value, input) {
result->Add(Serialize(value, attributeTypes));
}
return result;
}
static Dictionary::Ptr SerializeDictionary(const Dictionary::Ptr& input, int attributeTypes)
{
Dictionary::Ptr result = make_shared<Dictionary>();
ObjectLock olock(input);
BOOST_FOREACH(const Dictionary::Pair& kv, input) {
result->Set(kv.first, Serialize(kv.second, attributeTypes));
}
return result;
}
static Object::Ptr SerializeObject(const Object::Ptr& input, int attributeTypes)
{
const Type *type = input->GetReflectionType();
VERIFY(type);
Dictionary::Ptr fields = make_shared<Dictionary>();
for (int i = 0; i < type->GetFieldCount(); i++) {
Field field = type->GetFieldInfo(i);
if ((field.Attributes & attributeTypes) == 0)
continue;
fields->Set(field.Name, Serialize(input->GetField(i), attributeTypes));
}
fields->Set("__type", type->GetName());
return fields;
}
static Array::Ptr DeserializeArray(const Array::Ptr& input, bool safe_mode, int attributeTypes)
{
Array::Ptr result = make_shared<Array>();
ObjectLock olock(input);
BOOST_FOREACH(const Value& value, input) {
result->Add(Deserialize(value, safe_mode, attributeTypes));
}
return result;
}
static Dictionary::Ptr DeserializeDictionary(const Dictionary::Ptr& input, bool safe_mode, int attributeTypes)
{
Dictionary::Ptr result = make_shared<Dictionary>();
ObjectLock olock(input);
BOOST_FOREACH(const Dictionary::Pair& kv, input) {
result->Set(kv.first, Deserialize(kv.second, attributeTypes));
}
return result;
}
static Object::Ptr DeserializeObject(const Object::Ptr& object, const Dictionary::Ptr& input, bool safe_mode, int attributeTypes)
{
const Type *type;
if (object)
type = object->GetReflectionType();
else
type = Type::GetByName(input->Get("__type"));
if (!type)
return object;
Object::Ptr instance = object;
if (!instance) {
if (safe_mode && !type->IsSafe())
BOOST_THROW_EXCEPTION(std::runtime_error("Tried to instantiate type '" + type->GetName() + "' which is not marked as safe."));
instance = type->Instantiate();
}
BOOST_FOREACH(const Dictionary::Pair& kv, input) {
if (kv.first.IsEmpty())
continue;
int fid = type->GetFieldId(kv.first);
if (fid < 0)
continue;
Field field = type->GetFieldInfo(fid);
if ((field.Attributes & attributeTypes) == 0)
continue;
try {
instance->SetField(fid, Deserialize(kv.second, safe_mode, attributeTypes));
} catch (const std::exception&) {
instance->SetField(fid, Empty);
}
}
return instance;
}
Value icinga::Serialize(const Value& value, int attributeTypes)
{
if (!value.IsObject())
return value;
Object::Ptr input = value;
Array::Ptr array = dynamic_pointer_cast<Array>(input);
if (array != NULL)
return SerializeArray(array, attributeTypes);
Dictionary::Ptr dict = dynamic_pointer_cast<Dictionary>(input);
if (dict != NULL)
return SerializeDictionary(dict, attributeTypes);
return SerializeObject(input, attributeTypes);
}
Value icinga::Deserialize(const Value& value, bool safe_mode, int attributeTypes)
{
return Deserialize(Object::Ptr(), value, safe_mode, attributeTypes);
}
Value icinga::Deserialize(const Object::Ptr& object, const Value& value, bool safe_mode, int attributeTypes)
{
if (!value.IsObject())
return value;
Object::Ptr input = value;
Array::Ptr array = dynamic_pointer_cast<Array>(input);
if (array != NULL)
return DeserializeArray(array, safe_mode, attributeTypes);
Dictionary::Ptr dict = dynamic_pointer_cast<Dictionary>(input);
ASSERT(dict != NULL);
if (!dict->Contains("__type"))
return DeserializeDictionary(dict, safe_mode, attributeTypes);
return DeserializeObject(object, dict, safe_mode, attributeTypes);
}