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/*
Copyright (c) 2007 Till Adam <adam@kde.org>
Copyright (c) 2007 Volker Krause <vkrause@kde.org>
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This library 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#include "itemserializer_p.h"
#include "item.h"
#include "itemserializerplugin.h"
#include "typepluginloader_p.h"
// Qt
#include <QtCore/QBuffer>
#include <QtCore/QFile>
#include <QtCore/QIODevice>
#include <QtCore/QString>
#include <string>
Q_DECLARE_METATYPE( std::string )
namespace Akonadi {
DefaultItemSerializerPlugin::DefaultItemSerializerPlugin()
{
Item::addToLegacyMapping<QByteArray>( QLatin1String( "application/octet-stream" ) );
}
bool DefaultItemSerializerPlugin::deserialize( Item& item, const QByteArray& label, QIODevice& data, int )
{
if ( label != Item::FullPayload )
return false;
item.setPayload( data.readAll() );
return true;
}
void DefaultItemSerializerPlugin::serialize( const Item& item, const QByteArray& label, QIODevice& data, int& )
{
Q_ASSERT( label == Item::FullPayload );
Q_UNUSED( label );
data.write( item.payload<QByteArray>() );
}
bool StdStringItemSerializerPlugin::deserialize( Item& item, const QByteArray& label, QIODevice& data, int )
{
if ( label != Item::FullPayload )
return false;
std::string str;
{
const QByteArray ba = data.readAll();
str.assign( ba.data(), ba.size() );
}
item.setPayload( str );
return true;
}
void StdStringItemSerializerPlugin::serialize( const Item& item, const QByteArray& label, QIODevice& data, int& )
{
Q_ASSERT( label == Item::FullPayload );
Q_UNUSED( label );
const std::string str = item.payload<std::string>();
data.write( QByteArray::fromRawData( str.data(), str.size() ) );
}
/*static*/
void ItemSerializer::deserialize( Item& item, const QByteArray& label, const QByteArray& data, int version, bool external )
{
if ( external ) {
QFile file( QString::fromUtf8(data) );
if ( file.open( QIODevice::ReadOnly ) ) {
deserialize( item, label, file, version );
file.close();
}
} else {
QBuffer buffer;
buffer.setData( data );
buffer.open( QIODevice::ReadOnly );
buffer.seek( 0 );
deserialize( item, label, buffer, version );
buffer.close();
}
}
/*static*/
void ItemSerializer::deserialize( Item& item, const QByteArray& label, QIODevice& data, int version )
{
if ( !TypePluginLoader::defaultPluginForMimeType( item.mimeType() )->deserialize( item, label, data, version ) ) {
kWarning() << "Unable to deserialize payload part:" << label;
data.seek( 0 );
kWarning() << "Payload data was: " << data.readAll();
}
}
/*static*/
void ItemSerializer::serialize( const Item& item, const QByteArray& label, QByteArray& data, int &version )
{
QBuffer buffer;
buffer.setBuffer( &data );
buffer.open( QIODevice::WriteOnly );
buffer.seek( 0 );
serialize( item, label, buffer, version );
buffer.close();
}
/*static*/
void ItemSerializer::serialize( const Item& item, const QByteArray& label, QIODevice& data, int &version )
{
if ( !item.hasPayload() )
return;
ItemSerializerPlugin * plugin = TypePluginLoader::pluginForMimeTypeAndClass( item.mimeType(), item.availablePayloadMetaTypeIds() );
plugin->serialize( item, label, data, version );
}
void ItemSerializer::apply( Item &item, const Item &other )
{
if ( !other.hasPayload() )
return;
ItemSerializerPlugin *plugin = TypePluginLoader::pluginForMimeTypeAndClass( item.mimeType(), item.availablePayloadMetaTypeIds() );
ItemSerializerPluginV2 *pluginV2 = dynamic_cast<ItemSerializerPluginV2*>( plugin );
if ( pluginV2 ) {
pluginV2->apply( item, other );
return;
}
// Old-school merge:
foreach ( const QByteArray &part, other.loadedPayloadParts() ) {
QByteArray partData;
QBuffer buffer;
buffer.setBuffer( &partData );
buffer.open( QIODevice::ReadWrite );
buffer.seek( 0 );
int version;
serialize( other, part, buffer, version );
buffer.seek( 0 );
deserialize( item, part, buffer, version );
}
}
QSet<QByteArray> ItemSerializer::parts( const Item & item )
{
if ( !item.hasPayload() )
return QSet<QByteArray>();
return TypePluginLoader::pluginForMimeTypeAndClass( item.mimeType(), item.availablePayloadMetaTypeIds() )->parts( item );
}
QSet<QByteArray> ItemSerializer::availableParts( const Item & item )
{
if ( !item.hasPayload() )
return QSet<QByteArray>();
ItemSerializerPlugin *plugin = TypePluginLoader::pluginForMimeTypeAndClass( item.mimeType(), item.availablePayloadMetaTypeIds() );
ItemSerializerPluginV2 *pluginV2 = dynamic_cast<ItemSerializerPluginV2*>( plugin );
if ( pluginV2 )
return pluginV2->availableParts( item );
if (item.hasPayload())
return QSet<QByteArray>();
return QSet<QByteArray>() << Item::FullPayload;
}
Item ItemSerializer::convert( const Item & item, int mtid )
{
// kDebug() << "asked to convert a" << item.mimeType() << "item to format" << ( mtid ? QMetaType::typeName( mtid ) : "<legacy>" );
if ( !item.hasPayload() ) {
kDebug() << " -> but item has no payload!";
return Item();
}
if ( ItemSerializerPlugin * const plugin = TypePluginLoader::pluginForMimeTypeAndClass( item.mimeType(), QVector<int>( 1, mtid ), TypePluginLoader::NoDefault ) ) {
kDebug() << " -> found a plugin that feels responsible, trying serialising the payload";
QBuffer buffer;
buffer.open( QIODevice::ReadWrite );
int version;
serialize( item, Item::FullPayload, buffer, version );
buffer.seek( 0 );
kDebug() << " -> serialized payload into" << buffer.size() << "bytes" << endl
<< " -> going to deserialize";
Item newItem;
if ( plugin->deserialize( newItem, Item::FullPayload, buffer, version ) ) {
kDebug() << " -> conversion successful";
return newItem;
} else {
kDebug() << " -> conversion FAILED";
}
} else {
// kDebug() << " -> found NO plugin that feels responsible";
}
return Item();
}
}
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