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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_AbstractFunctionFactory_H |
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53 #define Patternist_AbstractFunctionFactory_H |
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54 |
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55 #include "qcommonnamespaces_p.h" |
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56 #include "qfunctionfactory_p.h" |
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57 #include "qfunctionsignature_p.h" |
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58 |
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59 QT_BEGIN_HEADER |
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60 |
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61 QT_BEGIN_NAMESPACE |
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62 |
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63 namespace QPatternist |
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64 { |
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65 |
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66 /** |
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67 * @short Supplies convenience code for the function factories. |
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68 * |
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69 * @ingroup Patternist_functions |
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70 * @see XPath10CoreFunctions |
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71 * @see XPath20CoreFunctions |
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72 * @see XSLT10CoreFunctions |
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73 * @author Vincent Ricard <magic@magicninja.org> |
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74 */ |
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75 class AbstractFunctionFactory : public FunctionFactory |
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76 { |
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77 public: |
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78 virtual Expression::Ptr createFunctionCall(const QXmlName name, |
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79 const Expression::List &arguments, |
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80 const StaticContext::Ptr &context, |
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81 const SourceLocationReflection *const r); |
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82 |
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83 virtual FunctionSignature::Hash functionSignatures() const; |
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84 |
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85 protected: |
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86 /** |
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87 * This function is responsible for creating the actual Expression, corresponding |
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88 * to @p localName and the function signature @p sign. It is called by |
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89 * createFunctionCall(), once it have been determined the function actually |
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90 * exists and have the correct arity. |
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91 * |
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92 * This function will only be called for names in the @c fn namespace. |
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93 */ |
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94 virtual Expression::Ptr retrieveExpression(const QXmlName name, |
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95 const Expression::List &args, |
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96 const FunctionSignature::Ptr &sign) const = 0; |
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97 |
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98 inline |
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99 FunctionSignature::Ptr addFunction(const QXmlName::LocalNameCode localName, |
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100 const FunctionSignature::Arity minArgs, |
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101 const FunctionSignature::Arity maxArgs, |
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102 const SequenceType::Ptr &returnType, |
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103 const Expression::Properties props) |
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104 { |
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105 return addFunction(localName, |
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106 minArgs, |
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107 maxArgs, |
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108 returnType, |
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109 Expression::IDIgnorableExpression, |
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110 props); |
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111 } |
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112 |
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113 FunctionSignature::Ptr addFunction(const QXmlName::LocalNameCode &localName, |
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114 const FunctionSignature::Arity minArgs, |
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115 const FunctionSignature::Arity maxArgs, |
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116 const SequenceType::Ptr &returnType, |
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117 const Expression::ID id = Expression::IDIgnorableExpression, |
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118 const Expression::Properties props = Expression::Properties(), |
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119 const StandardNamespaces::ID ns = StandardNamespaces::fn) |
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120 { |
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121 const QXmlName name(ns, localName); |
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122 |
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123 const FunctionSignature::Ptr s(new FunctionSignature(name, minArgs, maxArgs, |
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124 returnType, props, id)); |
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125 |
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126 m_signatures.insert(name, s); |
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127 return s; |
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128 } |
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129 |
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130 static inline QXmlName::LocalNameCode argument(const NamePool::Ptr &np, const char *const name) |
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131 { |
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132 return np->allocateLocalName(QLatin1String(name)); |
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133 } |
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134 |
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135 FunctionSignature::Hash m_signatures; |
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136 |
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137 private: |
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138 /** |
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139 * @short Determines whether @p arity is a valid number of |
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140 * arguments for the function with signature @p sign. |
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141 * |
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142 * If it is not, a static error with error code ReportContext::XPST0017 |
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143 * is issued via @p context. |
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144 */ |
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145 void verifyArity(const FunctionSignature::Ptr &sign, |
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146 const StaticContext::Ptr &context, |
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147 const xsInteger arity, |
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148 const SourceLocationReflection *const r) const; |
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149 |
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150 }; |
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151 } |
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152 |
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153 QT_END_NAMESPACE |
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154 |
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155 QT_END_HEADER |
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156 |
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157 #endif |