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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 // |
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43 // W A R N I N G |
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44 // ------------- |
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45 // |
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46 // This file is not part of the Qt API. It exists purely as an |
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47 // implementation detail. This header file may change from version to |
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48 // version without notice, or even be removed. |
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49 // |
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50 // We mean it. |
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51 |
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52 #ifndef Patternist_NodeFNs_H |
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53 #define Patternist_NodeFNs_H |
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54 |
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55 #include "qfunctioncall_p.h" |
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56 #include "qcastingplatform_p.h" |
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57 |
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58 /** |
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59 * @file |
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60 * @short Contains classes implementing the functions found in |
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61 * <a href="http://www.w3.org/TR/xpath-functions/#node-functions">XQuery 1.0 and |
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62 * XPath 2.0 Functions and Operators, 14 Functions and Operators on Nodes</a>. |
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63 * |
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64 * @ingroup Patternist_functions |
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65 */ |
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66 |
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67 QT_BEGIN_HEADER |
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68 |
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69 QT_BEGIN_NAMESPACE |
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70 |
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71 namespace QPatternist |
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72 { |
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73 /** |
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74 * @short Implements the function <tt>fn:name()</tt>. |
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75 * |
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76 * @ingroup Patternist_functions |
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77 * @author Frans Englich <frans.englich@nokia.com> |
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78 */ |
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79 class NameFN : public FunctionCall |
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80 { |
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81 public: |
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82 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
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83 }; |
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84 |
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85 /** |
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86 * @short Implements the function <tt>fn:local-name()</tt>. |
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87 * |
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88 * @ingroup Patternist_functions |
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89 * @author Frans Englich <frans.englich@nokia.com> |
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90 */ |
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91 class LocalNameFN : public FunctionCall |
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92 { |
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93 public: |
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94 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
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95 }; |
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96 |
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97 /** |
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98 * @short Implements the function <tt>fn:namespace-uri()</tt>. |
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99 * |
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100 * @ingroup Patternist_functions |
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101 * @author Frans Englich <frans.englich@nokia.com> |
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102 */ |
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103 class NamespaceURIFN : public FunctionCall |
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104 { |
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105 public: |
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106 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
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107 }; |
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108 |
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109 /** |
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110 * @short Implements the function <tt>fn:number()</tt>. |
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111 * |
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112 * NumberFN uses CastingPlatform for performing the actual casting. |
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113 * |
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114 * @ingroup Patternist_functions |
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115 * @author Frans Englich <frans.englich@nokia.com> |
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116 */ |
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117 class NumberFN : public FunctionCall, |
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118 public CastingPlatform<NumberFN, false> |
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119 { |
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120 public: |
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121 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
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122 |
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123 /** |
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124 * Overridden in order to call CastingPlatform::prepareCasting(). It also |
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125 * implements the optimization of rewriting to its operand if its |
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126 * type is xs:double(since the <tt>fn:number()</tt> call is in that case superflorous). |
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127 */ |
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128 virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
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129 const SequenceType::Ptr &reqType); |
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130 |
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131 /** |
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132 * @returns always BuiltinTypes::xsDouble. |
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133 */ |
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134 inline ItemType::Ptr targetType() const |
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135 { |
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136 return BuiltinTypes::xsDouble; |
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137 } |
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138 }; |
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139 |
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140 /** |
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141 * @short Implements the function <tt>fn:lang()</tt>. |
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142 * |
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143 * @ingroup Patternist_functions |
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144 * @author Frans Englich <frans.englich@nokia.com> |
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145 */ |
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146 class LangFN : public FunctionCall |
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147 { |
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148 public: |
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149 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
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150 |
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151 private: |
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152 static inline bool isLangMatch(const QString &candidate, const QString &toMatch); |
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153 }; |
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154 |
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155 /** |
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156 * @short Implements the function <tt>fn:root()</tt>. |
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157 * |
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158 * @ingroup Patternist_functions |
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159 * @author Frans Englich <frans.englich@nokia.com> |
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160 */ |
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161 class RootFN : public FunctionCall |
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162 { |
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163 public: |
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164 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
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165 /** |
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166 * Infers its cardinality from the argument. |
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167 */ |
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168 virtual SequenceType::Ptr staticType() const; |
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169 }; |
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170 } |
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171 |
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172 QT_END_NAMESPACE |
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173 |
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174 QT_END_HEADER |
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175 |
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176 #endif |