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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_TimezoneFNs_H
53 #define Patternist_TimezoneFNs_H
55 #include <private/qatomiccomparator_p.h>
56 #include <private/qfunctioncall_p.h>
60 * @short Contains classes implementing the functions found in
61 * <a href="http://www.w3.org/TR/xpath-functions/#timezone.functions">XQuery 1.0 and
62 * XPath 2.0 Functions and Operators, 10.7 Timezone Adjustment on Dates and SchemaTime Values</a>.
63 * @ingroup Patternist_functions
73 * @short Base class for classes implementing functions changing the timezone
76 * It would be possible to implement this with the Curiously Recurring Template Pattern, in order
77 * to avoid the virtual call dispatching that is done via createValue(). However, these are not
78 * very hot code paths and evaluateSingleton() is quite large, which would lead to heavy code
81 * @see <a href="http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern">Curiously
82 * Recurring Template Pattern, Wikipedia, the free encyclopedia</a>
83 * @ingroup Patternist_functions
84 * @author Frans Englich <frans.englich@nokia.com>
86 class AdjustTimezone : public FunctionCall
89 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
92 virtual Item createValue(const QDateTime &dt) const = 0;
96 * @short Implements the function <tt>fn:adjust-dateTime-to-timezone()</tt>.
98 * @ingroup Patternist_functions
99 * @author Frans Englich <frans.englich@nokia.com>
101 class AdjustDateTimeToTimezoneFN : public AdjustTimezone
104 virtual Item createValue(const QDateTime &dt) const;
108 * @short Implements the function <tt>fn:adjust-dateTime-to-timezone()</tt>.
110 * @ingroup Patternist_functions
111 * @author Frans Englich <frans.englich@nokia.com>
113 class AdjustDateToTimezoneFN : public AdjustTimezone
116 virtual Item createValue(const QDateTime &dt) const;
120 * @short Implements the function <tt>fn:adjust-time-to-timezone()</tt>.
122 * @ingroup Patternist_functions
123 * @author Frans Englich <frans.englich@nokia.com>
125 class AdjustTimeToTimezoneFN : public AdjustTimezone
128 virtual Item createValue(const QDateTime &dt) const;