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6 | ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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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_NodeFNs_H |
51 | #define Patternist_NodeFNs_H |
52 | |
53 | #include <private/qfunctioncall_p.h> |
54 | #include <private/qcastingplatform_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/#node-functions">XQuery 1.0 and |
60 | * XPath 2.0 Functions and Operators, 14 Functions and Operators on Nodes</a>. |
61 | * |
62 | * @ingroup Patternist_functions |
63 | */ |
64 | |
65 | QT_BEGIN_NAMESPACE |
66 | |
67 | namespace QPatternist |
68 | { |
69 | /** |
70 | * @short Implements the function <tt>fn:name()</tt>. |
71 | * |
72 | * @ingroup Patternist_functions |
73 | * @author Frans Englich <frans.englich@nokia.com> |
74 | */ |
75 | class NameFN : public FunctionCall |
76 | { |
77 | public: |
78 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
79 | }; |
80 | |
81 | /** |
82 | * @short Implements the function <tt>fn:local-name()</tt>. |
83 | * |
84 | * @ingroup Patternist_functions |
85 | * @author Frans Englich <frans.englich@nokia.com> |
86 | */ |
87 | class LocalNameFN : public FunctionCall |
88 | { |
89 | public: |
90 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
91 | }; |
92 | |
93 | /** |
94 | * @short Implements the function <tt>fn:namespace-uri()</tt>. |
95 | * |
96 | * @ingroup Patternist_functions |
97 | * @author Frans Englich <frans.englich@nokia.com> |
98 | */ |
99 | class NamespaceURIFN : public FunctionCall |
100 | { |
101 | public: |
102 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
103 | }; |
104 | |
105 | /** |
106 | * @short Implements the function <tt>fn:number()</tt>. |
107 | * |
108 | * NumberFN uses CastingPlatform for performing the actual casting. |
109 | * |
110 | * @ingroup Patternist_functions |
111 | * @author Frans Englich <frans.englich@nokia.com> |
112 | */ |
113 | class NumberFN : public FunctionCall, |
114 | public CastingPlatform<NumberFN, false> |
115 | { |
116 | public: |
117 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
118 | |
119 | /** |
120 | * Overridden in order to call CastingPlatform::prepareCasting(). It also |
121 | * implements the optimization of rewriting to its operand if its |
122 | * type is xs:double(since the <tt>fn:number()</tt> call is in that case superflorous). |
123 | */ |
124 | virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
125 | const SequenceType::Ptr &reqType); |
126 | |
127 | /** |
128 | * @returns always BuiltinTypes::xsDouble. |
129 | */ |
130 | inline ItemType::Ptr targetType() const |
131 | { |
132 | return BuiltinTypes::xsDouble; |
133 | } |
134 | }; |
135 | |
136 | /** |
137 | * @short Implements the function <tt>fn:lang()</tt>. |
138 | * |
139 | * @ingroup Patternist_functions |
140 | * @author Frans Englich <frans.englich@nokia.com> |
141 | */ |
142 | class LangFN : public FunctionCall |
143 | { |
144 | public: |
145 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
146 | |
147 | private: |
148 | static inline bool isLangMatch(const QString &candidate, const QString &toMatch); |
149 | }; |
150 | |
151 | /** |
152 | * @short Implements the function <tt>fn:root()</tt>. |
153 | * |
154 | * @ingroup Patternist_functions |
155 | * @author Frans Englich <frans.englich@nokia.com> |
156 | */ |
157 | class RootFN : public FunctionCall |
158 | { |
159 | public: |
160 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
161 | /** |
162 | * Infers its cardinality from the argument. |
163 | */ |
164 | virtual SequenceType::Ptr staticType() const; |
165 | }; |
166 | } |
167 | |
168 | QT_END_NAMESPACE |
169 | |
170 | #endif |
171 | |