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46 // This file is not part of the Qt API. It exists purely as an
47 // implementation detail. This header file may change from version to
48 // version without notice, or even be removed.
52 #ifndef Patternist_UntypedAtomicConverter_H
53 #define Patternist_UntypedAtomicConverter_H
55 #include <private/qitem_p.h>
56 #include <private/qsinglecontainer_p.h>
57 #include <private/qcastingplatform_p.h>
66 * @short Casts every item in a sequence obtained from
67 * evaluating an Expression, to a requested atomic type.
69 * The atomic values it casts from are instances of xs:untypedAtomic(hence
70 * the name). Typically, the items are from an Atomizer. UntypedAtomicConverter
71 * implements the automatic conversion which typically is activated when XPath
72 * is handling untyped data.
74 * @see <a href="http://www.w3.org/TR/xpath20/#id-function-calls">XML Path
75 * Language (XPath) 2.0, 3.1.5 Function Calls, in particular the
76 * Function Conversion Rules</a>
77 * @author Frans Englich <frans.englich@nokia.com>
78 * @ingroup Patternist_expressions
80 class UntypedAtomicConverter : public SingleContainer,
81 public CastingPlatform<UntypedAtomicConverter, true>
84 UntypedAtomicConverter(const Expression::Ptr &operand,
85 const ItemType::Ptr &reqType,
86 const ReportContext::ErrorCode code = ReportContext::FORG0001);
88 virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;
89 virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const;
91 virtual SequenceType::Ptr staticType() const;
92 virtual SequenceType::List expectedOperandTypes() const;
94 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
97 * Overridden to call CastingPlatform::typeCheck()
99 virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
100 const SequenceType::Ptr &reqType);
102 inline Item mapToItem(const Item &item,
103 const DynamicContext::Ptr &context) const;
105 inline ItemType::Ptr targetType() const
110 virtual const SourceLocationReflection *actualReflection() const;
113 typedef QExplicitlySharedDataPointer<const UntypedAtomicConverter> ConstPtr;
114 const ItemType::Ptr m_reqType;
117 Item UntypedAtomicConverter::mapToItem(const Item &item, const DynamicContext::Ptr &context) const
119 return cast(item, context);