Constructs an element node. This covers both computed and directly constructed element nodes. More...

#include <qattributeconstructor_p.h>

Inheritance diagram for QPatternist::AttributeConstructor:

Public Functions
virtual ExpressionVisitorResult::Ptr	accept (const ExpressionVisitor::Ptr &visitor) const

	AttributeConstructor (const Expression::Ptr &operand1, const Expression::Ptr &operand2)

virtual Item	evaluateSingleton (const DynamicContext::Ptr &context) const

virtual void	evaluateToSequenceReceiver (const DynamicContext::Ptr &context) const

virtual SequenceType::List	expectedOperandTypes () const

virtual ID	id () const

virtual Properties	properties () const

virtual SequenceType::Ptr	staticType () const

Public Functions inherited from QPatternist::PairContainer
virtual bool	compressOperands (const StaticContext::Ptr &)

virtual Expression::List	operands () const

virtual void	setOperands (const Expression::List &operands)

Public Functions inherited from QPatternist::Expression
virtual const SourceLocationReflection *	actualReflection () const
	Returns `this`. More...

virtual void	announceFocusType (const ItemType::Ptr &itemType)

virtual Expression::Ptr	compress (const StaticContext::Ptr &context)

Properties	deepProperties () const
	Computes the union of properties for this Expression and all its descending children. More...

virtual Properties	dependencies () const

virtual QString	description () const

virtual bool	evaluateEBV (const DynamicContext::Ptr &context) const

virtual Item::Iterator::Ptr	evaluateSequence (const DynamicContext::Ptr &context) const

virtual ItemType::Ptr	expectedContextItemType () const

	Expression ()

bool	has (const Property prop) const

bool	hasDependency (const Property prop) const

bool	is (const ID id) const

bool	isEvaluated () const

virtual ItemType::Ptr	newFocusType () const

virtual QList< QExplicitlySharedDataPointer< OptimizationPass > >	optimizationPasses () const

virtual PatternPriority	patternPriority () const

const Expression::Ptr &	rewrite (const Expression::Ptr &to, const StaticContext::Ptr &context) const
	Rewrites this Expression to `to`, and return `to`. More...

virtual Expression::Ptr	typeCheck (const StaticContext::Ptr &context, const SequenceType::Ptr &reqType)

virtual	~Expression ()

Public Functions inherited from QSharedData
	QSharedData ()
	Constructs a QSharedData object with a reference count of 0. More...

	QSharedData (const QSharedData &)
	Constructs a QSharedData object with reference count 0. More...

Public Functions inherited from QPatternist::CppCastingHelper< Expression >
const TCastTarget *	as () const

TCastTarget *	as ()

Public Functions inherited from QPatternist::SourceLocationReflection
virtual QSourceLocation	sourceLocation () const

	SourceLocationReflection ()

virtual	~SourceLocationReflection ()

Static Private Functions
static QString	processValue (const QXmlName name, const Item &value)

Additional Inherited Members
Public Types inherited from QPatternist::Expression
typedef QExplicitlySharedDataPointer< const Expression >	ConstPtr
	A smart pointer wrapping `const` Expression instances. More...

enum	ID { IDBooleanValue = 1, IDCountFN, IDEmptyFN, IDExistsFN, IDExpressionSequence, IDGeneralComparison, IDIfThenClause, IDIgnorableExpression, IDIntegerValue, IDPositionFN, IDStringValue, IDValueComparison, IDRangeVariableReference, IDContextItem, IDUserFunctionCallsite, IDExpressionVariableReference, IDAttributeConstructor, IDUpperCaseFN, IDLowerCaseFN, IDFirstItemPredicate, IDEmptySequence, IDReturnOrderBy, IDLetClause, IDForClause, IDPath, IDNamespaceConstructor, IDArgumentReference, IDGenericPredicate, IDAxisStep, IDFloat, IDCombineNodes, IDUnresolvedVariableReference, IDCardinalityVerifier }

typedef QList< Expression::Ptr >	List

typedef QFlags< Property >	Properties

enum	Property { UseContextItem = 1, DisableElimination = 1 << 1, IsEvaluated = 1 << 2, DisableTypingDeduction = 1 << 3, EmptynessFollowsChild = 1 << 4, RewriteToEmptyOnEmpty = 1 << 5, RequiresFocus = 1 << 6, AffectsOrderOnly = 1 << 7, RequiresContextItem = (1 << 8) \| RequiresFocus, CreatesFocusForLast = 1 << 9, LastOperandIsCollation = 1 << 10, DependsOnLocalVariable = (1 << 11) \| DisableElimination, EvaluationCacheRedundant = (1 << 12), IsNodeConstructor = 1 << 13, RequiresCurrentItem = 1 << 14 }

typedef QExplicitlySharedDataPointer< Expression >	Ptr
	A smart pointer wrapping mutable Expression instances. More...

typedef ::QAbstractXmlForwardIterator< Expression::Ptr >	QAbstractXmlForwardIterator

typedef QVector< Expression::Ptr >	Vector

Static Public Functions inherited from QPatternist::Expression
static void	rewrite (Expression::Ptr &old, const Expression::Ptr &New, const StaticContext::Ptr &context)

Public Variables inherited from QSharedData
QAtomicInt	ref

Protected Functions inherited from QPatternist::PairContainer
	PairContainer (const Expression::Ptr &operand1, const Expression::Ptr &operand2)

Protected Functions inherited from QPatternist::Expression
void	typeCheckOperands (const StaticContext::Ptr &context)

Protected Functions inherited from QPatternist::CppCastingHelper< Expression >
	CppCastingHelper ()

Protected Variables inherited from QPatternist::PairContainer
Expression::Ptr	m_operand1

Expression::Ptr	m_operand2

Detailed Description

Constructs an element node. This covers both computed and directly constructed element nodes.

See also: XQuery 1.0: An XML Query Language, 3.7 Constructors

Author: Frans Englich frans.nosp@m..eng.nosp@m.lich@.nosp@m.noki.nosp@m.a.com

Definition at line 72 of file qattributeconstructor_p.h.

Constructors and Destructors

◆ AttributeConstructor()

AttributeConstructor::AttributeConstructor	(	const Expression::Ptr &	operand1,
		const Expression::Ptr &	operand2
	)

Definition at line 54 of file qattributeconstructor.cpp.

                                                                      : PairContainer(op1, op2)
 {
 }

Functions

◆ accept()

ExpressionVisitorResult::Ptr AttributeConstructor::accept ( const ExpressionVisitor::Ptr & visitor ) const

virtual

Implements QPatternist::Expression.

Definition at line 117 of file qattributeconstructor.cpp.

 {
     return visitor->visit(this);
 }

◆ evaluateSingleton()

Item AttributeConstructor::evaluateSingleton ( const DynamicContext::Ptr & context ) const

virtual

Reimplemented from QPatternist::Expression.

Definition at line 70 of file qattributeconstructor.cpp.

 {
     const Item nameItem(m_operand1->evaluateSingleton(context));
     const Item content(m_operand2->evaluateSingleton(context));
 
     const QXmlName name(nameItem.as<QNameValue>()->qName());
     const QString value(processValue(name, content));
     const NodeBuilder::Ptr nodeBuilder(context->nodeBuilder(QUrl()));
 
     nodeBuilder->attribute(name, QStringRef(&value));
 
     const QAbstractXmlNodeModel::Ptr nm(nodeBuilder->builtDocument());
     context->addNodeModel(nm);
     return nm->root(QXmlNodeModelIndex());
 }

◆ evaluateToSequenceReceiver()

void AttributeConstructor::evaluateToSequenceReceiver ( const DynamicContext::Ptr & context ) const

virtual

Evaluates this Expression by sending its output to DynamicContext::outputReceiver().

Reimplemented from QPatternist::Expression.

Definition at line 86 of file qattributeconstructor.cpp.

 {
     QAbstractXmlReceiver *const receiver = context->outputReceiver();
     const Item nameItem(m_operand1->evaluateSingleton(context));
 
     const Item content(m_operand2->evaluateSingleton(context));
     const QXmlName name(nameItem.as<QNameValue>()->qName());
     const QString value(processValue(name, content));
 
     receiver->attribute(name, QStringRef(&value));
 }

◆ expectedOperandTypes()

SequenceType::List AttributeConstructor::expectedOperandTypes ( ) const

virtual

The first operand must be exactly one xs:QName, and the second argument can be zero or more items.

Implements QPatternist::Expression.

Definition at line 103 of file qattributeconstructor.cpp.

 {
     SequenceType::List result;
     result.append(CommonSequenceTypes::ExactlyOneQName);
     result.append(CommonSequenceTypes::ZeroOrMoreItems);
     return result;
 }

◆ id()

Expression::ID AttributeConstructor::id ( ) const

virtual

Returns: always IDAttributeConstructor.

Reimplemented from QPatternist::Expression.

Definition at line 122 of file qattributeconstructor.cpp.

 {
     return IDAttributeConstructor;
 }

◆ processValue()

QString AttributeConstructor::processValue	(	const QXmlName	name,
		const Item &	value
	)

inlinestaticprivate

Definition at line 59 of file qattributeconstructor.cpp.

Referenced by evaluateSingleton(), and evaluateToSequenceReceiver().

 {
     if(!value)
         return QString();
     else if(name == QXmlName(StandardNamespaces::xml, StandardLocalNames::id))
         return value.stringValue().simplified();
     else
         return value.stringValue();
 }

◆ properties()

Expression::Properties AttributeConstructor::properties ( ) const

virtual

Returns: a bitwise OR'd value of properties, describing the characteristics of the expression. These properties affects how this Expression is treated in for example type checking stages.

The default implementation returns 0. Override and let the function return a different value, if that's of interest.

An important decision when re-implementing properties() is whether to OR in the properties() of ones operands. For instance, if an operand has RequiresFocus set, that flag nost likely applies to the apparent as well, since it depends on its operand.

See also: deepProperties()

Returns: Expression::None, meaning no special properties

Reimplemented from QPatternist::Expression.

Definition at line 111 of file qattributeconstructor.cpp.

 {
     return DisableElimination | IsNodeConstructor;
 }

◆ staticType()

SequenceType::Ptr AttributeConstructor::staticType ( ) const

virtual

Returns: the static type of this Expression. For example, an 'and' expression have as static type xs:boolean

Implements QPatternist::Expression.

Definition at line 98 of file qattributeconstructor.cpp.

 {
     return CommonSequenceTypes::ExactlyOneAttribute;
 }

The documentation for this class was generated from the following files:

/src/xmlpatterns/expr/qattributeconstructor_p.h
/src/xmlpatterns/expr/qattributeconstructor.cpp

Public Functions

Static Private Functions

Additional Inherited Members

Detailed Description

Constructors and Destructors

◆ AttributeConstructor()

Functions

◆ accept()

◆ evaluateSingleton()

◆ evaluateToSequenceReceiver()

◆ expectedOperandTypes()

◆ id()

◆ processValue()

◆ properties()

◆ staticType()