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39 | |
40 | // |
41 | // W A R N I N G |
42 | // ------------- |
43 | // |
44 | // This file is not part of the Qt API. It exists purely as an |
45 | // implementation detail. This header file may change from version to |
46 | // version without notice, or even be removed. |
47 | // |
48 | // We mean it. |
49 | |
50 | #ifndef Patternist_TimezoneFNs_H |
51 | #define Patternist_TimezoneFNs_H |
52 | |
53 | #include <private/qatomiccomparator_p.h> |
54 | #include <private/qfunctioncall_p.h> |
55 | |
56 | /** |
57 | * @file |
58 | * @short Contains classes implementing the functions found in |
59 | * <a href="http://www.w3.org/TR/xpath-functions/#timezone.functions">XQuery 1.0 and |
60 | * XPath 2.0 Functions and Operators, 10.7 Timezone Adjustment on Dates and SchemaTime Values</a>. |
61 | * @ingroup Patternist_functions |
62 | */ |
63 | |
64 | QT_BEGIN_NAMESPACE |
65 | |
66 | namespace QPatternist |
67 | { |
68 | /** |
69 | * @short Base class for classes implementing functions changing the timezone |
70 | * on values. |
71 | * |
72 | * It would be possible to implement this with the Curiously Recurring Template Pattern, in order |
73 | * to avoid the virtual call dispatching that is done via createValue(). However, these are not |
74 | * very hot code paths and evaluateSingleton() is quite large, which would lead to heavy code |
75 | * expansion. |
76 | * |
77 | * @see <a href="http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern">Curiously |
78 | * Recurring Template Pattern, Wikipedia, the free encyclopedia</a> |
79 | * @ingroup Patternist_functions |
80 | * @author Frans Englich <frans.englich@nokia.com> |
81 | */ |
82 | class AdjustTimezone : public FunctionCall |
83 | { |
84 | public: |
85 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
86 | |
87 | protected: |
88 | virtual Item createValue(const QDateTime &dt) const = 0; |
89 | }; |
90 | |
91 | /** |
92 | * @short Implements the function <tt>fn:adjust-dateTime-to-timezone()</tt>. |
93 | * |
94 | * @ingroup Patternist_functions |
95 | * @author Frans Englich <frans.englich@nokia.com> |
96 | */ |
97 | class AdjustDateTimeToTimezoneFN : public AdjustTimezone |
98 | { |
99 | protected: |
100 | virtual Item createValue(const QDateTime &dt) const; |
101 | }; |
102 | |
103 | /** |
104 | * @short Implements the function <tt>fn:adjust-dateTime-to-timezone()</tt>. |
105 | * |
106 | * @ingroup Patternist_functions |
107 | * @author Frans Englich <frans.englich@nokia.com> |
108 | */ |
109 | class AdjustDateToTimezoneFN : public AdjustTimezone |
110 | { |
111 | protected: |
112 | virtual Item createValue(const QDateTime &dt) const; |
113 | }; |
114 | |
115 | /** |
116 | * @short Implements the function <tt>fn:adjust-time-to-timezone()</tt>. |
117 | * |
118 | * @ingroup Patternist_functions |
119 | * @author Frans Englich <frans.englich@nokia.com> |
120 | */ |
121 | class AdjustTimeToTimezoneFN : public AdjustTimezone |
122 | { |
123 | protected: |
124 | virtual Item createValue(const QDateTime &dt) const; |
125 | }; |
126 | } |
127 | |
128 | QT_END_NAMESPACE |
129 | |
130 | #endif |
131 | |