Revision control
++ // Copyright (C) 2019 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #include <private/opcuaelementoperand_p.h>
++
++ QT_BEGIN_NAMESPACE
++
++ /*!
++ \qmltype ElementOperand
++ \inqmlmodule QtOpcUa
++ \brief The OPC UA ElementOperand type.
++ \since QtOpcUa 5.13
++ \deprecated [6.9]
++
++ The ElementOperand is defined in OPC UA 1.05 part 4, 7.7.4.2.
++ It is used to identify another element in the filter by its index
++ (the first element has the index 0).
++
++ This is required to create complex filters, for example to reference
++ the two operands of the AND operation in ((Severity > 500) AND (Message == "TestString")).
++ The first step is to create content filter elements for the two conditions (Severity > 500)
++ and (Message == "TestString"). A third content filter element is required to create an AND
++ combination of the two conditions. It consists of the AND operator and two element operands
++ with the indices of the two conditions created before:
++
++ \code
++ import QtOpcUa as QtOpcUa
++
++ QtOpcUa.EventFilter {
++ select : [ ... ]
++ where: [
++ QtOpcUa.FilterElement {
++ operator: QtOpcUa.FilterElement.GreaterThan
++ firstOperand: QtOpcUa.SimpleAttributeOperand {
++ browsePath: [
++ QtOpcUa.NodeId {
++ identifier: "Severity"
++ ns: "http://opcfoundation.org/UA/"
++ }
++ ]
++ }
++ secondOperand: QtOpcUa.LiteralOperand {
++ value: 500
++ type: QtOpcUa.Constants.UInt16
++ }
++ }
++ QtOpcUa.FilterElement {
++ operator: QtOpcUa.FilterElement.Equals
++ firstOperand: QtOpcUa.SimpleAttributeOperand {
++ browsePath: [
++ QtOpcUa.NodeId {
++ identifier: "Message"
++ ns: "http://opcfoundation.org/UA/"
++ }
++ ]
++ }
++ secondOperand: QtOpcUa.LiteralOperand {
++ value: "TestString"
++ type: QtOpcUa.Constants.String
++ }
++ }
++ QtOpcUa.FilterElement {
++ operator: QtOpcUa.FilterElement.And
++ firstOperand: QtOpcUa.ElementOperand {
++ index: 0
++ }
++ secondOperand: QtOpcUa.ElementOperand {
++ index: 1
++ }
++ }
++ ]
++ }
++ \endcode
++ */
++
++ /*!
++ \qmlproperty int ElementOperand::index
++
++ Index of the filter element that is going to be used as operand.
++ */
++
++ OpcUaElementOperand::OpcUaElementOperand(QObject *parent)
++ : OpcUaOperandBase(parent)
++ {
++ }
++
++ OpcUaElementOperand::~OpcUaElementOperand() = default;
++
++ QVariant OpcUaElementOperand::toCppVariant(QOpcUaClient* client) const
++ {
++ Q_UNUSED(client);
++ QOpcUaElementOperand value(*this);
++ return value;
++ }
++
++ quint32 OpcUaElementOperand::index() const
++ {
++ return QOpcUaElementOperand::index();
++ }
++
++ void OpcUaElementOperand::setIndex(quint32 index)
++ {
++ if (index != QOpcUaElementOperand::index()) {
++ QOpcUaElementOperand::setIndex(index);
++ emit dataChanged();
++ }
++ }
++
++ QT_END_NAMESPACE