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qt6-migration-pipeline/Lts/Common/CodeGen/svc_json.cpp.grantlee
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/**
* Json <-> DDS conversion routines
* $Id$
* $HeadURL$
* $Author$
* Created by Christian Ehrlicher, SLSE, 2017-11-30
*/
{% autoescape off %}
// filename: {{ namespace_abbr }}_json.cpp
#include "{{ namespace_abbr }}_json.h"
#include <QJsonArray>
#include <QJsonObject>
#include <QJsonDocument>
#include <LtsUtilsCore/dds_vector.h>
#include <dds/core/String.hpp>
namespace {{ namespace }}
{
template<>
int fromJson(const QJsonValue &val, type<int>)
{
return val.toInt();
}
template<>
double fromJson(const QJsonValue &val, type<double>)
{
return val.toDouble();
}
template<>
qint64 fromJson(const QJsonValue &val, type<qint64>)
{
return val.toString().toLongLong();
}
QJsonValue toJson(int vec)
{
return QJsonValue(vec);
}
QJsonValue toJson(double vec)
{
return QJsonValue(vec);
}
QJsonValue toJson(qint64 vec)
{
return QJsonValue(QString::number(vec));
}
// std::string
QJsonValue toJson(const std::string &element)
{
return QJsonValue(QString::fromStdString(element));
}
template<>
std::string fromJson(const QJsonValue &val, type<std::string>)
{
return val.toString().toStdString();
}
// std::vector<T>
template<typename T>
QJsonArray toJson(const std::vector<T> &vec)
{
QJsonArray arr;
for (const auto &element : vec)
arr.push_back(toJson(element));
return arr;
}
template<typename T>
std::vector<T> fromJson(const QJsonValue &val, type<std::vector<T>>)
{
std::vector<T> ret;
if (!val.isArray())
return ret;
const QJsonArray array(val.toArray());
ret.reserve(array.size());
for(int i = 0; i < array.size(); ++i)
ret.push_back(fromJson(array.at(i), type<T>{}));
return ret;
}
// dds::core:vector<uint8_t> (bytestream)
inline QJsonValue toJson(const std::vector<uint8_t> &element)
{
return QJsonValue(QString::fromLatin1(QByteArray::fromRawData(reinterpret_cast<const char *>(&element.at(0)),
static_cast<int>(element.size())).toBase64()));
}
template<>
std::vector<uint8_t> fromJson(const QJsonValue &val, type<std::vector<uint8_t>>)
{
const QByteArray ba(QByteArray::fromBase64(val.toString().toLatin1()));
return LtsUtils::convert<std::vector<uint8_t>>(ba);
}
{% for dt in jsonTopics %}
// {{ dt.name }}
QJsonObject toJson(const {{ dt.name }} &element)
{
QJsonObject obj;
{% for row in dt.cppMember %}
{{ row.ddsToJsonElement }};
{% endfor %}
return obj;
}
template<>
{{ dt.name }} fromJson(const QJsonValue &value, type<{{ dt.name }}>)
{
const QJsonObject objElement(value.toObject());
{{ dt.name }} element;
{% for row in dt.cppMember %}
{ {{ row.jsonElementToDds }}; } {% endfor %}
return element;
}
//
// extensions to support sequence of seqence of Non-POD :
//
QJsonValue toJson(const std::vector <{{ dt.name }} > &element)
{
if (element.size() == 0)
return QJsonValue();
QJsonArray array;
for(size_t i = 0; i < element.size(); ++i)
array.push_back(toJson(element.at(i)));
return array;
}
template<>
std::vector<{{ dt.name }}> fromJson(const QJsonValue &value, type< std::vector <{{ dt.name }} > >)
{
std::vector < {{ dt.name }} > ret;
if (value.isNull())
return ret;
if (!value.isArray())
return ret;
const QJsonArray array = value.toArray();
ret.reserve(array.size());
for(const auto &ele : array)
ret.push_back(fromJson(ele, type<{{ dt.name }}>{}));
return ret;
}
{% endfor %}
} // namespace {{ namespace }}
{% endautoescape %}