The OPC UA ContentFilterElement. More...
| Header: | #include <QOpcUaContentFilterElement> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS OpcUa)target_link_libraries(mytarget PRIVATE Qt6::OpcUa) |
| qmake: | QT += opcua |
| enum | FilterOperator { Equals, IsNull, GreaterThan, LessThan, GreaterThanOrEqual, …, BitwiseOr } |
| QOpcUaContentFilterElement() | |
| QOpcUaContentFilterElement(const QOpcUaContentFilterElement &rhs) | |
| QList<QVariant> | filterOperands() const |
| QList<QVariant> & | filterOperandsRef() |
| QOpcUaContentFilterElement::FilterOperator | filterOperator() const |
| void | setFilterOperands(const QList<QVariant> &filterOperands) |
| void | setFilterOperator(QOpcUaContentFilterElement::FilterOperator filterOperator) |
| QVariant | operator QVariant() const |
| QOpcUaContentFilterElement & | operator<<(QOpcUaContentFilterElement::FilterOperator op) |
| QOpcUaContentFilterElement & | operator<<(const QOpcUaAttributeOperand &op) |
| QOpcUaContentFilterElement & | operator<<(const QOpcUaElementOperand &op) |
| QOpcUaContentFilterElement & | operator<<(const QOpcUaLiteralOperand &op) |
| QOpcUaContentFilterElement & | operator<<(const QOpcUaSimpleAttributeOperand &op) |
| QOpcUaContentFilterElement & | operator=(const QOpcUaContentFilterElement &rhs) |
(since 6.7) bool |
operator!=(const QOpcUaContentFilterElement &lhs, const QOpcUaContentFilterElement &rhs) |
| bool | operator==(const QOpcUaContentFilterElement &lhs, const QOpcUaContentFilterElement &rhs) |
A content filter element contains an operator and a list of operands. There are four different operator types which contain literal values, references to attributes of nodes or to other content filter elements.
A combination of one or more content filter elements makes a content filter which is used by the server to filter data for the criteria defined by the content filter elements. For example, the where clause of an event filter is a content filter which is used to decide if a notification is generated for an event.
FilterOperator enumerates all possible operators for a ContentFilterElement that are specified in OPC UA 1.05 part 4, 7.7.3.
| Constant | Value |
|---|---|
QOpcUaContentFilterElement::Equals |
0 |
QOpcUaContentFilterElement::IsNull |
1 |
QOpcUaContentFilterElement::GreaterThan |
2 |
QOpcUaContentFilterElement::LessThan |
3 |
QOpcUaContentFilterElement::GreaterThanOrEqual |
4 |
QOpcUaContentFilterElement::LessThanOrEqual |
5 |
QOpcUaContentFilterElement::Like |
6 |
QOpcUaContentFilterElement::Not |
7 |
QOpcUaContentFilterElement::Between |
8 |
QOpcUaContentFilterElement::InList |
9 |
QOpcUaContentFilterElement::And |
10 |
QOpcUaContentFilterElement::Or |
11 |
QOpcUaContentFilterElement::Cast |
12 |
QOpcUaContentFilterElement::InView |
13 |
QOpcUaContentFilterElement::OfType |
14 |
QOpcUaContentFilterElement::RelatedTo |
15 |
QOpcUaContentFilterElement::BitwiseAnd |
16 |
QOpcUaContentFilterElement::BitwiseOr |
17 |
Default constructs a content filter element with no parameters set.
Constructs a content filter element from rhs.
Returns the operands of the filter element.
See also setFilterOperands().
Returns a reference to the filter operands.
See also filterOperands().
Returns the filter operator.
See also setFilterOperator().
Sets the filter operands for this content filter element to filterOperands. Supported classes are QOpcUaElementOperand, QOpcUaLiteralOperand, QOpcUaSimpleAttributeOperand and QOpcUaAttributeOperand.
See also filterOperands().
Sets the operator that is applied to the filter operands to filterOperator.
See also filterOperator().
Converts this content filter element to QVariant.
Sets filter operator op in this content filter element. If multiple operators are streamed into one content filter element, only the last operator is used. All others are discarded.
Adds the attribute operand op to the operands list of this content filter element.
Adds the element operand op to the operands list of this content filter element.
Adds the literal operand op to the operands list of this content filter element.
Adds the simple attribute operand op to the operands list of this content filter element.
Sets the values from rhs in this content filter element.
[noexcept, since 6.7] bool operator!=(const QOpcUaContentFilterElement &lhs, const QOpcUaContentFilterElement &rhs)Returns true if lhs has a different value than rhs.
This function was introduced in Qt 6.7.
[noexcept] bool operator==(const QOpcUaContentFilterElement &lhs, const QOpcUaContentFilterElement &rhs)Returns true if lhs has the same value as rhs.
