Creates an xs:QName value from a lexical QName using statically known namespace bindings. More...

#include <qqnameconstructor_p.h>

Inheritance diagram for QPatternist::QNameConstructor:

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

virtual const SourceLocationReflection *	actualReflection () const
	Returns `this`. More...

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

virtual SequenceType::List	expectedOperandTypes () const

	QNameConstructor (const Expression::Ptr &source, const NamespaceResolver::Ptr &nsResolver)

virtual SequenceType::Ptr	staticType () const

Public Functions inherited from QPatternist::SingleContainer
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 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 void	evaluateToSequenceReceiver (const DynamicContext::Ptr &context) const

virtual ItemType::Ptr	expectedContextItemType () const

	Expression ()

bool	has (const Property prop) const

bool	hasDependency (const Property prop) const

virtual ID	id () 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

virtual Properties	properties () 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 Public Functions
template<typename TReportContext , const ReportContext::ErrorCode InvalidQName, const ReportContext::ErrorCode NoBinding>
static QXmlName	expandQName (const QString &lexicalQName, const TReportContext &context, const NamespaceResolver::Ptr &nsResolver, const SourceLocationReflection *const r, const bool asForAttribute=false)

static QXmlName::NamespaceCode	namespaceForPrefix (const QXmlName::PrefixCode prefix, const StaticContext::Ptr &context, const SourceLocationReflection *const r)

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

Properties
const NamespaceResolver::Ptr	m_nsResolver

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

Public Variables inherited from QSharedData
QAtomicInt	ref

Protected Functions inherited from QPatternist::SingleContainer
	SingleContainer (const Expression::Ptr &operand)

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::SingleContainer
Expression::Ptr	m_operand

Detailed Description

Creates an xs:QName value from a lexical QName using statically known namespace bindings.

See also: QQNameValue; QXmlUtils

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

Definition at line 75 of file qqnameconstructor_p.h.

Constructors and Destructors

◆ QNameConstructor()

QNameConstructor::QNameConstructor	(	const Expression::Ptr &	source,
		const NamespaceResolver::Ptr &	nsResolver
	)

Definition at line 52 of file qqnameconstructor.cpp.

                                                                            : SingleContainer(source),
                                                                                m_nsResolver(nsResolver)
 {
     Q_ASSERT(m_nsResolver);
 }

Functions

◆ accept()

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

virtual

Implements QPatternist::Expression.

Definition at line 104 of file qqnameconstructor.cpp.

 {
     return visitor->visit(this);
 }

◆ actualReflection()

const SourceLocationReflection * QNameConstructor::actualReflection ( ) const

virtual

Returns this.

Reimplemented from QPatternist::Expression.

Definition at line 109 of file qqnameconstructor.cpp.

 {
     return m_operand.data();
 }

◆ evaluateSingleton()

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

virtual

Reimplemented from QPatternist::Expression.

Definition at line 59 of file qqnameconstructor.cpp.

 {
     Q_ASSERT(context);
     const QString lexQName(m_operand->evaluateSingleton(context).stringValue());
 
     const QXmlName expQName(expandQName<DynamicContext::Ptr,
                                         ReportContext::XQDY0074,
                                         ReportContext::XQDY0074>(lexQName,
                                                                  context,
                                                                  m_nsResolver,
                                                                  this));
     return toItem(QNameValue::fromValue(context->namePool(), expQName));
 }

◆ expandQName()

template<typename TReportContext , const ReportContext::ErrorCode InvalidQName, const ReportContext::ErrorCode NoBinding>

QXmlName QPatternist::QNameConstructor::expandQName	(	const QString &	lexicalQName,
		const TReportContext &	context,
		const NamespaceResolver::Ptr &	nsResolver,
		const SourceLocationReflection *const	r,
		const bool	asForAttribute = `false`
	)

static

Expands lexicalQName, which is a lexical representation of a QName such as "x:body", into a QName using nsResolver to supply the namespace bindings.

If lexicalQName is lexically invalid InvalidQName is raised via context, or if no namespace binding does not exists for a prefix(if any) in lexicalQName, NoBinding is raised via context.

If asForAttribute is true, the name is considered to be for an attribute in some way, and lexicalQName will not pick up the default namespace if it doesn't have a prefix.

nsResolver is parameterized meaning the function can be instantiated with either DynamicContext or StaticContext.

See also: QQNameValue; QXmlUtils

Definition at line 137 of file qqnameconstructor_p.h.

Referenced by QPatternist::CastAs::castToQName(), QPatternist::ElementAvailableFN::evaluateEBV(), QPatternist::SystemPropertyFN::evaluateSingleton(), QPatternist::FunctionAvailableFN::evaluateSingleton(), QPatternist::TypeAvailableFN::evaluateSingleton(), evaluateSingleton(), QPatternist::ResolveQNameFN::evaluateSingleton(), and QPatternist::yyparse().

     {
         Q_ASSERT(nsResolver);
         Q_ASSERT(context);
 
         if(XPathHelper::isQName(lexicalQName))
         {
             QString prefix;
             QString local;
             XPathHelper::splitQName(lexicalQName, prefix, local);
             const QXmlName::NamespaceCode nsCode = asForAttribute && prefix.isEmpty() ? QXmlName::NamespaceCode(StandardNamespaces::empty)
                                                                                    : (nsResolver->lookupNamespaceURI(context->namePool()->allocatePrefix(prefix)));
 
             if(nsCode == NamespaceResolver::NoBinding)
             {
                 context->error(QtXmlPatterns::tr("No namespace binding exists for "
                                   "the prefix %1 in %2").arg(formatKeyword(prefix),
                                                              formatKeyword(lexicalQName)),
                                NoBinding,
                                r);
                 return QXmlName(); /* Silence compiler warning. */
             }
             else
                 return context->namePool()->allocateQName(context->namePool()->stringForNamespace(nsCode), local, prefix);
         }
         else
         {
             context->error(QtXmlPatterns::tr("%1 is an invalid %2")
                               .arg(formatData(lexicalQName))
                               .arg(formatType(context->namePool(), BuiltinTypes::xsQName)),
                            InvalidQName,
                            r);
             return QXmlName(); /* Silence compiler warning. */
         }
     }

◆ expectedOperandTypes()

SequenceType::List QNameConstructor::expectedOperandTypes ( ) const

virtual

Returns a list of Sequence Types, describing the type of each of the expression's operands. Hence, this function has a relationship to the operands() function:

- The lengths of the lists returned by expectedOperandTypes()
and operands() should always be equal in length, since one
cannot describe the type of a non-existent operand(and all
operands must have type information).
- A significant difference between the two functions is that while
the type of objects in the list returned by operands() may vary
between compilations/static context, simply because the particular
Expression is part of different XPath expressions, the
types in the list returned by expectedOperandTypes is always the same
since the function/operator signature never changes.

This function should not be confused with staticType(), which returns the static type of the expression itself, not its operands. The function call is an expression where this is clear: the type of the return value is not the same as the arguments' types. The static type of the operands supplied to the expression can be determined via the staticType() function of the instances returned by operands().

If the expression has no operands, an empty list should be returned.

Implements QPatternist::Expression.

Definition at line 97 of file qqnameconstructor.cpp.

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

◆ namespaceForPrefix()

QXmlName::NamespaceCode QNameConstructor::namespaceForPrefix	(	const QXmlName::PrefixCode	prefix,
		const StaticContext::Ptr &	context,
		const SourceLocationReflection *const	r
	)

static

Resolves the namespace prefix prefix to its namespace if it exists, or raised ReportContext::XPST0081 otherwise.

Returns: the namespace URI corresponding to prefix

Definition at line 73 of file qqnameconstructor.cpp.

Referenced by QPatternist::yyparse().

 {
     Q_ASSERT(context);
     const QXmlName::NamespaceCode ns(context->namespaceBindings()->lookupNamespaceURI(prefix));
 
     if(ns == NamespaceResolver::NoBinding)
     {
         context->error(QtXmlPatterns::tr("No namespace binding exists for the prefix %1")
                           .arg(formatKeyword(context->namePool()->stringForPrefix(prefix))),
                        ReportContext::XPST0081,
                        r);
         return NamespaceResolver::NoBinding;
     }
     else
         return ns;
 }

◆ staticType()

SequenceType::Ptr QNameConstructor::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 92 of file qqnameconstructor.cpp.

 {
     return CommonSequenceTypes::ExactlyOneQName;
 }

Properties

◆ m_nsResolver

const NamespaceResolver::Ptr QPatternist::QNameConstructor::m_nsResolver

private

Definition at line 131 of file qqnameconstructor_p.h.

Referenced by evaluateSingleton(), and QNameConstructor().

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

/src/xmlpatterns/expr/qqnameconstructor_p.h
/src/xmlpatterns/expr/qqnameconstructor.cpp

Public Functions

Static Public Functions

Properties

Additional Inherited Members

Detailed Description

Constructors and Destructors

◆ QNameConstructor()

Functions

◆ accept()

◆ actualReflection()

◆ evaluateSingleton()

◆ expandQName()

◆ expectedOperandTypes()

◆ namespaceForPrefix()

◆ staticType()

Properties

◆ m_nsResolver