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/****************************************************************************
**
** Copyright (C) 2017 Ford Motor Company
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtRemoteObjects module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qremoteobjectdynamicreplica.h"
#include "qremoteobjectreplica_p.h"
#include <QtCore/qmetaobject.h>
QT_BEGIN_NAMESPACE
/*!
\class QRemoteObjectDynamicReplica
\inmodule QtRemoteObjects
\brief A dynamically instantiated \l {Replica}.
There are generated replicas (replicas having the header files produced by the \l {repc} {Replica Compiler}), and dynamic replicas, which are generated on-the-fly. This is the class for the dynamic type of replica.
When the connection to the \l {Source} object is made, the initialization step passes the current property values (see \l {Replica Initialization}). In a DynamicReplica, the property/signal/slot details are also sent, allowing the replica object to be created on-the-fly. This can be conventient in QML or scripting, but has two primary disadvantages. First, the object is in effect "empty" until it is successfully initialized by the \l {Source}. Second, in C++, calls must be made using QMetaObject::invokeMethod(), as the moc generated lookup will not be available.
This class does not have a public constructor. It can only be instantiated by using the dynamic QRemoteObjectNode::acquire method.
*/
QRemoteObjectDynamicReplica::QRemoteObjectDynamicReplica()
: QRemoteObjectReplica()
{
}
QRemoteObjectDynamicReplica::QRemoteObjectDynamicReplica(QRemoteObjectNode *node, const QString &name)
: QRemoteObjectReplica(ConstructWithNode)
{
initializeNode(node, name);
}
/*!
Destroys the dynamic replica.
\sa {Replica Ownership}
*/
QRemoteObjectDynamicReplica::~QRemoteObjectDynamicReplica()
{
}
/*!
\internal
Returns a pointer to the dynamically generated meta-object of this object, or
QRemoteObjectDynamicReplica's metaObject if the object is not initialized. This
function overrides the QObject::metaObject() virtual function to provide the same
functionality for dynamic replicas.
\sa QObject::metaObject(), {Replica Initialization}
*/
const QMetaObject* QRemoteObjectDynamicReplica::metaObject() const
{
auto impl = qSharedPointerCast<QRemoteObjectReplicaImplementation>(d_impl);
// Returning nullptr will likely result in a crash if this type is used before the
// definition is received. Note: QRemoteObjectDynamicReplica doesn't include the
// QObject macro, so it's metaobject would resolve to QRemoteObjectReplica::metaObject()
// if we weren't overriding it.
if (!impl->m_metaObject) {
qWarning() << "Dynamic metaobject is not assigned, returning generic Replica metaObject.";
qWarning() << "This may cause issues if used for more than checking the Replica state.";
return QRemoteObjectReplica::metaObject();
}
return impl->m_metaObject;
}
/*!
\internal
This function overrides the QObject::qt_metacast() virtual function to provide the same functionality for dynamic replicas.
\sa QObject::qt_metacast()
*/
void *QRemoteObjectDynamicReplica::qt_metacast(const char *name)
{
if (!name)
return 0;
if (!strcmp(name, "QRemoteObjectDynamicReplica"))
return static_cast<void*>(const_cast<QRemoteObjectDynamicReplica*>(this));
// not entirely sure that one is needed... TODO: check
auto impl = qSharedPointerCast<QRemoteObjectReplicaImplementation>(d_impl);
if (QString::fromLatin1(name) == impl->m_objectName)
return static_cast<void*>(const_cast<QRemoteObjectDynamicReplica*>(this));
return QObject::qt_metacast(name);
}
/*!
\internal
This function overrides the QObject::qt_metacall() virtual function to provide the same functionality for dynamic replicas.
\sa QObject::qt_metacall()
*/
int QRemoteObjectDynamicReplica::qt_metacall(QMetaObject::Call call, int id, void **argv)
{
static const bool debugArgs = qEnvironmentVariableIsSet("QT_REMOTEOBJECT_DEBUG_ARGUMENTS");
auto impl = qSharedPointerCast<QConnectedReplicaImplementation>(d_impl);
int saved_id = id;
id = QRemoteObjectReplica::qt_metacall(call, id, argv);
if (id < 0 || impl->m_metaObject == nullptr)
return id;
if (call == QMetaObject::ReadProperty || call == QMetaObject::WriteProperty) {
QMetaProperty mp = metaObject()->property(saved_id);
int &status = *reinterpret_cast<int *>(argv[2]);
if (call == QMetaObject::WriteProperty) {
QVariantList args;
if (mp.userType() == QMetaType::QVariant)
args << *reinterpret_cast<QVariant*>(argv[0]);
else
args << QVariant(mp.userType(), argv[0]);
QRemoteObjectReplica::send(QMetaObject::WriteProperty, saved_id, args);
} else {
if (mp.userType() == QMetaType::QVariant)
*reinterpret_cast<QVariant*>(argv[0]) = impl->m_propertyStorage[id];
else {
const QVariant value = propAsVariant(id);
QMetaType::destruct(mp.userType(), argv[0]);
QMetaType::construct(mp.userType(), argv[0], value.data());
}
const bool readStatus = true;
// Caller supports QVariant returns? Then we can also report errors
// by storing an invalid variant.
if (!readStatus && argv[1]) {
status = 0;
reinterpret_cast<QVariant*>(argv[1])->clear();
}
}
id = -1;
} else if (call == QMetaObject::InvokeMetaMethod) {
if (id < impl->m_numSignals) {
qCDebug(QT_REMOTEOBJECT) << "DynamicReplica Activate" << impl->m_metaObject->method(saved_id).methodSignature();
// signal relay from Source world to Replica
QMetaObject::activate(this, impl->m_metaObject, id, argv);
} else {
// method relay from Replica to Source
const QMetaMethod mm = impl->m_metaObject->method(saved_id);
const QList<QByteArray> types = mm.parameterTypes();
const int typeSize = types.size();
QVariantList args;
args.reserve(typeSize);
for (int i = 0; i < typeSize; ++i) {
const int type = QMetaType::type(types[i].constData());
if (impl->m_metaObject->indexOfEnumerator(types[i].constData()) != -1) {
const auto size = QMetaType(type).sizeOf();
switch (size) {
case 1: args.push_back(QVariant(QMetaType::Char, argv[i + 1])); break;
case 2: args.push_back(QVariant(QMetaType::Short, argv[i + 1])); break;
case 4: args.push_back(QVariant(QMetaType::Int, argv[i + 1])); break;
// Qt currently only supports enum values of 4 or less bytes (QMetaEnum value(index) returns int)
// case 8: args.push_back(QVariant(QMetaType::Int, argv[i + 1])); break;
default:
qWarning() << "Invalid enum detected (Dynamic Replica)" << QMetaType::typeName(type) << "with size" << size;
args.push_back(QVariant(QMetaType::Int, argv[i + 1])); break;
}
} else
args.push_back(QVariant(type, argv[i + 1]));
}
if (debugArgs) {
qCDebug(QT_REMOTEOBJECT) << "method" << mm.methodSignature() << "invoked - args:" << args;
} else {
qCDebug(QT_REMOTEOBJECT) << "method" << mm.methodSignature() << "invoked";
}
if (mm.returnType() == QMetaType::Void)
QRemoteObjectReplica::send(QMetaObject::InvokeMetaMethod, saved_id, args);
else {
QRemoteObjectPendingCall call = QRemoteObjectReplica::sendWithReply(QMetaObject::InvokeMetaMethod, saved_id, args);
if (argv[0])
*(static_cast<QRemoteObjectPendingCall*>(argv[0])) = call;
}
}
id = -1;
}
return id;
}
QT_END_NAMESPACE
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