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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
64QT_BEGIN_NAMESPACE
65
66namespace 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
128QT_END_NAMESPACE
129
130#endif
131

source code of qtxmlpatterns/src/xmlpatterns/functions/qtimezonefns_p.h