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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_Atomizer_H
53 #define Patternist_Atomizer_H
56 #include "qsinglecontainer_p.h"
66 * @short Performs atomization. Effectively, it is an implementation
67 * of the <tt>fn:data()</tt> function.
69 * @see <a href="http://www.w3.org/TR/xpath-functions/#func-data">XQuery 1.0 and XPath
70 * 2.0 Functions and Operators, 2.4 fn:data</a>
71 * @see <a href="http://www.w3.org/TR/xpath20/#id-atomization">XML
72 * Path Language (XPath) 2.0, 2.4.2 Atomization</a>
73 * @author Frans Englich <frans.englich@nokia.com>
74 * @ingroup Patternist_expressions
76 class Atomizer : public SingleContainer
79 Atomizer(const Expression::Ptr &operand);
81 virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;
82 virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const;
84 virtual SequenceType::Ptr staticType() const;
86 virtual SequenceType::List expectedOperandTypes() const;
87 virtual const SourceLocationReflection *actualReflection() const;
90 * Makes an early compression, by returning the result of
91 * the type checked operand, if the operand has the static type
92 * xs:anyAtomicType(no atomization needed).
94 virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
95 const SequenceType::Ptr &reqType);
97 inline Item::Iterator::Ptr mapToSequence(const Item &item,
98 const DynamicContext::Ptr &context) const;
99 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
102 typedef QExplicitlySharedDataPointer<const Atomizer> ConstPtr;