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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_QNameConstructor_H |
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53 #define Patternist_QNameConstructor_H |
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54 |
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55 #include "qsinglecontainer_p.h" |
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56 #include "qbuiltintypes_p.h" |
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57 #include "qpatternistlocale_p.h" |
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58 #include "qxpathhelper_p.h" |
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59 |
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60 QT_BEGIN_HEADER |
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61 |
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62 QT_BEGIN_NAMESPACE |
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63 |
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64 namespace QPatternist |
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65 { |
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66 /** |
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67 * @short Creates an @c xs:QName value from a lexical QName using |
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68 * statically known namespace bindings. |
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69 * |
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70 * @see QQNameValue |
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71 * @see QXmlUtils |
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72 * @author Frans Englich <frans.englich@nokia.com> |
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73 * @ingroup Patternist_expressions |
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74 */ |
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75 class QNameConstructor : public SingleContainer |
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76 { |
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77 public: |
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78 |
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79 QNameConstructor(const Expression::Ptr &source, |
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80 const NamespaceResolver::Ptr &nsResolver); |
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81 |
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82 virtual Item evaluateSingleton(const DynamicContext::Ptr &) const; |
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83 |
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84 virtual SequenceType::List expectedOperandTypes() const; |
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85 |
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86 virtual SequenceType::Ptr staticType() const; |
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87 |
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88 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; |
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89 |
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90 /** |
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91 * Expands @p lexicalQName, which is a lexical representation of a QName such as "x:body", into |
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92 * a QName using @p nsResolver to supply the namespace bindings. |
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93 * |
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94 * If @p lexicalQName is lexically invalid @p InvalidQName is raised via @p context, or if |
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95 * no namespace binding does not exists for a prefix(if any) in @p lexicalQName, @p NoBinding |
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96 * is raised via @p context. |
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97 * |
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98 * If @p asForAttribute is @c true, the name is considered to be for an |
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99 * attribute in some way, and @p lexicalQName will not pick up the |
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100 * default namespace if it doesn't have a prefix. |
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101 * |
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102 * @p nsResolver is parameterized meaning the function can be instantiated with either |
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103 * DynamicContext or StaticContext. |
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104 * |
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105 * @see QQNameValue |
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106 * @see QXmlUtils |
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107 */ |
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108 template<typename TReportContext, |
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109 const ReportContext::ErrorCode InvalidQName, |
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110 const ReportContext::ErrorCode NoBinding> |
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111 static |
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112 QXmlName expandQName(const QString &lexicalQName, |
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113 const TReportContext &context, |
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114 const NamespaceResolver::Ptr &nsResolver, |
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115 const SourceLocationReflection *const r, |
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116 const bool asForAttribute = false); |
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117 |
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118 /** |
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119 * Resolves the namespace prefix @p prefix to its namespace if it exists, or |
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120 * raised ReportContext::XPST0081 otherwise. |
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121 * |
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122 * @returns the namespace URI corresponding to @p prefix |
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123 */ |
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124 static QXmlName::NamespaceCode namespaceForPrefix(const QXmlName::PrefixCode prefix, |
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125 const StaticContext::Ptr &context, |
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126 const SourceLocationReflection *const r); |
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127 |
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128 virtual const SourceLocationReflection *actualReflection() const; |
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129 |
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130 private: |
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131 const NamespaceResolver::Ptr m_nsResolver; |
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132 }; |
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133 |
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134 template<typename TReportContext, |
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135 const ReportContext::ErrorCode InvalidQName, |
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136 const ReportContext::ErrorCode NoBinding> |
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137 QXmlName QNameConstructor::expandQName(const QString &lexicalQName, |
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138 const TReportContext &context, |
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139 const NamespaceResolver::Ptr &nsResolver, |
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140 const SourceLocationReflection *const r, |
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141 const bool asForAttribute) |
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142 { |
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143 Q_ASSERT(nsResolver); |
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144 Q_ASSERT(context); |
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145 |
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146 if(XPathHelper::isQName(lexicalQName)) |
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147 { |
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148 QString prefix; |
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149 QString local; |
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150 XPathHelper::splitQName(lexicalQName, prefix, local); |
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151 const QXmlName::NamespaceCode nsCode = asForAttribute && prefix.isEmpty() ? QXmlName::NamespaceCode(StandardNamespaces::empty) |
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152 : (nsResolver->lookupNamespaceURI(context->namePool()->allocatePrefix(prefix))); |
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153 |
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154 if(nsCode == NamespaceResolver::NoBinding) |
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155 { |
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156 context->error(QtXmlPatterns::tr("No namespace binding exists for " |
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157 "the prefix %1 in %2").arg(formatKeyword(prefix), |
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158 formatKeyword(lexicalQName)), |
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159 NoBinding, |
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160 r); |
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161 return QXmlName(); /* Silence compiler warning. */ |
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162 } |
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163 else |
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164 return context->namePool()->allocateQName(context->namePool()->stringForNamespace(nsCode), local, prefix); |
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165 } |
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166 else |
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167 { |
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168 context->error(QtXmlPatterns::tr("%1 is an invalid %2") |
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169 .arg(formatData(lexicalQName)) |
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170 .arg(formatType(context->namePool(), BuiltinTypes::xsQName)), |
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171 InvalidQName, |
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172 r); |
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173 return QXmlName(); /* Silence compiler warning. */ |
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174 } |
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175 } |
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176 } |
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177 |
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178 QT_END_NAMESPACE |
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179 |
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180 QT_END_HEADER |
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181 |
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182 #endif |