QOpcUaSimpleAttributeOperand Class

The OPC UA SimpleAttributeOperand type. More...

Header: #include <QOpcUaSimpleAttributeOperand>
CMake: find_package(Qt6 REQUIRED COMPONENTS OpcUa)
target_link_libraries(mytarget PRIVATE Qt6::OpcUa)
qmake: QT += opcua

Public Functions

QOpcUaSimpleAttributeOperand()
QOpcUaSimpleAttributeOperand(const QString &name, quint16 namespaceIndex = 0, const QString &typeId = QStringLiteral("ns=0;i=2041"), QOpcUa::NodeAttribute attributeId = QOpcUa::NodeAttribute::Value)
QOpcUaSimpleAttributeOperand(QOpcUa::NodeAttribute attributeId, const QString &typeId = QStringLiteral("ns=0;i=2041"))
QOpcUaSimpleAttributeOperand(const QOpcUaSimpleAttributeOperand &rhs)
QOpcUa::NodeAttribute attributeId() const
QList<QOpcUaQualifiedName> browsePath() const
QList<QOpcUaQualifiedName> &browsePathRef()
QString indexRange() const
void setAttributeId(QOpcUa::NodeAttribute attributeId)
void setBrowsePath(const QList<QOpcUaQualifiedName> &browsePath)
void setIndexRange(const QString &indexRange)
void setTypeId(const QString &typeId)
QString typeId() const
QVariant operator QVariant() const
QOpcUaSimpleAttributeOperand &operator=(const QOpcUaSimpleAttributeOperand &rhs)
(since 6.7) bool operator!=(const QOpcUaSimpleAttributeOperand &lhs, const QOpcUaSimpleAttributeOperand &rhs)
bool operator==(const QOpcUaSimpleAttributeOperand &lhs, const QOpcUaSimpleAttributeOperand &rhs)

Detailed Description

The SimpleAttributeOperand is specified in OPC UA 1.05 part 4, 7.7.4.5. It is used when a node attribute is required as operand.

For example, the following simple attribute operand represents the value of the "Severity" field of the base event type:

Member Function Documentation

QOpcUaSimpleAttributeOperand::QOpcUaSimpleAttributeOperand()

Default constructs a simple attribute operand with no parameters set.

QOpcUaSimpleAttributeOperand::QOpcUaSimpleAttributeOperand(const QString &name, quint16 namespaceIndex = 0, const QString &typeId = QStringLiteral("ns=0;i=2041"), QOpcUa::NodeAttribute attributeId = QOpcUa::NodeAttribute::Value)

Constructs a simple attribute operand for attribute attributeId of the direct child with the browse name name in namespace namespaceIndex. typeId is the node id of a type definition node. The operand will be restricted to instances of type typeId or a subtype.

QOpcUaSimpleAttributeOperand::QOpcUaSimpleAttributeOperand(QOpcUa::NodeAttribute attributeId, const QString &typeId = QStringLiteral("ns=0;i=2041"))

Constructs a simple attribute operand for the attribute attributeId of an object or variable of type typeId. This can be used for requesting the ConditionId in an event filter as described in OPC UA 1.05 part 9, 5.5.2.

QOpcUaSimpleAttributeOperand::QOpcUaSimpleAttributeOperand(const QOpcUaSimpleAttributeOperand &rhs)

Constructs a simple attribute operand from rhs.

QOpcUa::NodeAttribute QOpcUaSimpleAttributeOperand::attributeId() const

Returns the attribute of the node browsePath is pointing to.

See also setAttributeId().

QList<QOpcUaQualifiedName> QOpcUaSimpleAttributeOperand::browsePath() const

Returns the relative path to a node starting from typeId.

See also setBrowsePath().

QList<QOpcUaQualifiedName> &QOpcUaSimpleAttributeOperand::browsePathRef()

Returns a reference to the browse path.

See also browsePath().

QString QOpcUaSimpleAttributeOperand::indexRange() const

Returns the index range string.

See also setIndexRange().

void QOpcUaSimpleAttributeOperand::setAttributeId(QOpcUa::NodeAttribute attributeId)

Sets the attribute id to attributeId.

See also attributeId().

void QOpcUaSimpleAttributeOperand::setBrowsePath(const QList<QOpcUaQualifiedName> &browsePath)

Sets the browse path to the node holding the attribute to browsePath.

See also browsePath().

void QOpcUaSimpleAttributeOperand::setIndexRange(const QString &indexRange)

Sets the index range string used to identify a single value or subset of the attribute's value to indexRange.

See also indexRange().

void QOpcUaSimpleAttributeOperand::setTypeId(const QString &typeId)

Sets the node id of the type definition node to typeId. The operand will be of the type or one of its subtypes.

See also typeId().

QString QOpcUaSimpleAttributeOperand::typeId() const

Returns the node id of a type definition node.

See also setTypeId().

QVariant QOpcUaSimpleAttributeOperand::operator QVariant() const

Converts this simple attribute operand to QVariant.

QOpcUaSimpleAttributeOperand &QOpcUaSimpleAttributeOperand::operator=(const QOpcUaSimpleAttributeOperand &rhs)

Sets the values from rhs in this simple attribute operand.

Related Non-Members

[noexcept, since 6.7] bool operator!=(const QOpcUaSimpleAttributeOperand &lhs, const QOpcUaSimpleAttributeOperand &rhs)

Returns true if lhs has a different value than rhs.

This function was introduced in Qt 6.7.

[noexcept] bool operator==(const QOpcUaSimpleAttributeOperand &lhs, const QOpcUaSimpleAttributeOperand &rhs)

Returns true if lhs has the same value as rhs.

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