ModelView::JsonDocument Class Reference

Saves and restores list of SessionModel's to/from disk using json format. More...

Inheritance diagram for ModelView::JsonDocument:

Collaboration diagram for ModelView::JsonDocument:

Classes
struct	JsonDocumentImpl

Public Member Functions
	JsonDocument (const std::vector< SessionModel * > &models)
	~JsonDocument () override
void	load (const std::string &file_name) override
	Loads models from disk. If models have some data already, it will be rewritten. More...
void	save (const std::string &file_name) const override
	Saves models on disk. More...

Private Attributes
std::unique_ptr< JsonDocumentImpl >	p_impl

Detailed Description

Saves and restores list of SessionModel's to/from disk using json format.

Single JsonDocument corresponds to a single file on disk.

Definition at line 29 of file jsondocument.h.

Constructor & Destructor Documentation

JsonDocument()

JsonDocument::JsonDocument

(

const std::vector< SessionModel * > &

models

)

Definition at line 32 of file jsondocument.cpp.

    : p_impl(std::make_unique<JsonDocumentImpl>(models))
{
}

~JsonDocument()

JsonDocument::~JsonDocument ( )

overridedefault

Member Function Documentation

load()

void JsonDocument::load ( const std::string &  file_name )

overridevirtual

Loads models from disk. If models have some data already, it will be rewritten.

Implements ModelView::ModelDocumentInterface.

Definition at line 59 of file jsondocument.cpp.

{
    QFile file(QString::fromStdString(file_name));
    if (!file.open(QIODevice::ReadOnly))
        throw std::runtime_error("Error in JsonDocument: can't read the file '" + file_name + "'");
 
    auto document = QJsonDocument::fromJson(file.readAll());
    auto array = document.array();
    if (array.size() != static_cast<int>(p_impl->models.size())) {
        std::ostringstream ostr;
        ostr << "Error in JsonDocument: number of application models " << p_impl->models.size()
             << " and number of json models " << array.size() << " doesn't match";
        throw std::runtime_error(ostr.str());
    }
 
    auto converter = ModelView::CreateModelProjectConverter();
    int index(0);
    for (auto model : p_impl->models) {
        converter->from_json(array.at(index).toObject(), *model);
        ++index;
    }
 
    file.close();
}

References ModelView::CreateModelProjectConverter(), and p_impl.

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save()

void JsonDocument::save ( const std::string &  file_name ) const

overridevirtual

Saves models on disk.

Implements ModelView::ModelDocumentInterface.

Definition at line 38 of file jsondocument.cpp.

{
    auto converter = ModelView::CreateModelProjectConverter();
    QJsonArray array;
 
    for (auto model : p_impl->models)
        array.push_back(converter->to_json(*model));
 
    QJsonDocument document(array);
    QFile file(QString::fromStdString(file_name));
 
    if (!file.open(QIODevice::WriteOnly))
        throw std::runtime_error("Error in JsonDocument: can't save the file '" + file_name + "'");
 
    file.write(document.toJson());
 
    file.close();
}

References ModelView::CreateModelProjectConverter(), and p_impl.

Referenced by TEST_F().

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Member Data Documentation

p_impl

std::unique_ptr<JsonDocumentImpl> ModelView::JsonDocument::p_impl

private

Definition at line 39 of file jsondocument.h.

Referenced by load(), and save().

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The documentation for this class was generated from the following files:

• /home/www/ba/mvvm/model/mvvm/serialization/jsondocument.h
• /home/www/ba/mvvm/model/mvvm/serialization/jsondocument.cpp