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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| |
| #ifndef Patternist_TimezoneFNs_H |
| #define Patternist_TimezoneFNs_H |
| |
| #include <private/qatomiccomparator_p.h> |
| #include <private/qfunctioncall_p.h> |
| |
| /** |
| * @file |
| * @short Contains classes implementing the functions found in |
| * <a href="http://www.w3.org/TR/xpath-functions/#timezone.functions">XQuery 1.0 and |
| * XPath 2.0 Functions and Operators, 10.7 Timezone Adjustment on Dates and SchemaTime Values</a>. |
| * @ingroup Patternist_functions |
| */ |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QPatternist |
| { |
| /** |
| * @short Base class for classes implementing functions changing the timezone |
| * on values. |
| * |
| * It would be possible to implement this with the Curiously Recurring Template Pattern, in order |
| * to avoid the virtual call dispatching that is done via createValue(). However, these are not |
| * very hot code paths and evaluateSingleton() is quite large, which would lead to heavy code |
| * expansion. |
| * |
| * @see <a href="http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern">Curiously |
| * Recurring Template Pattern, Wikipedia, the free encyclopedia</a> |
| * @ingroup Patternist_functions |
| * @author Frans Englich <frans.englich@nokia.com> |
| */ |
| class AdjustTimezone : public FunctionCall |
| { |
| public: |
| virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
| |
| protected: |
| virtual Item createValue(const QDateTime &dt) const = 0; |
| }; |
| |
| /** |
| * @short Implements the function <tt>fn:adjust-dateTime-to-timezone()</tt>. |
| * |
| * @ingroup Patternist_functions |
| * @author Frans Englich <frans.englich@nokia.com> |
| */ |
| class AdjustDateTimeToTimezoneFN : public AdjustTimezone |
| { |
| protected: |
| virtual Item createValue(const QDateTime &dt) const; |
| }; |
| |
| /** |
| * @short Implements the function <tt>fn:adjust-dateTime-to-timezone()</tt>. |
| * |
| * @ingroup Patternist_functions |
| * @author Frans Englich <frans.englich@nokia.com> |
| */ |
| class AdjustDateToTimezoneFN : public AdjustTimezone |
| { |
| protected: |
| virtual Item createValue(const QDateTime &dt) const; |
| }; |
| |
| /** |
| * @short Implements the function <tt>fn:adjust-time-to-timezone()</tt>. |
| * |
| * @ingroup Patternist_functions |
| * @author Frans Englich <frans.englich@nokia.com> |
| */ |
| class AdjustTimeToTimezoneFN : public AdjustTimezone |
| { |
| protected: |
| virtual Item createValue(const QDateTime &dt) const; |
| }; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |