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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2008 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 #include <QVariant> |
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43 |
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44 #include "qabstractxmlnodemodel_p.h" |
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45 #include "qitemmappingiterator_p.h" |
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46 #include "qitem_p.h" |
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47 #include "qxmlname.h" |
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48 #include "qxmlquery_p.h" |
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49 |
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50 #include "qpullbridge_p.h" |
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51 |
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52 QT_BEGIN_NAMESPACE |
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53 |
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54 using namespace QPatternist; |
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55 |
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56 /*! |
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57 \brief Bridges a QPatternist::SequenceIterator to QAbstractXmlPullProvider. |
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58 \class QPatternist::PullBridge |
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59 \internal |
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60 \reentrant |
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61 \ingroup xml-tools |
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62 |
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63 The approach of this class is rather straight forward since QPatternist::SequenceIterator |
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64 and QAbstractXmlPullProvider are conceptually similar. While QPatternist::SequenceIterator only |
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65 delivers top level items(since it's not an event stream, it's a list of items), PullBridge |
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66 needs to recursively iterate the children of nodes too, which is achieved through the |
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67 stack m_iterators. |
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68 */ |
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69 |
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70 AbstractXmlPullProvider::Event PullBridge::next() |
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71 { |
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72 m_index = m_iterators.top().second->next(); |
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73 |
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74 if(!m_index.isNull()) |
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75 { |
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76 Item item(m_index); |
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77 |
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78 if(item && item.isAtomicValue()) |
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79 m_current = AtomicValue; |
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80 else |
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81 { |
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82 Q_ASSERT(item.isNode()); |
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83 |
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84 switch(m_index.kind()) |
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85 { |
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86 case QXmlNodeModelIndex::Attribute: |
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87 { |
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88 m_current = Attribute; |
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89 break; |
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90 } |
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91 case QXmlNodeModelIndex::Comment: |
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92 { |
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93 m_current = Comment; |
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94 break; |
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95 } |
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96 case QXmlNodeModelIndex::Element: |
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97 { |
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98 m_iterators.push(qMakePair(StartElement, m_index.iterate(QXmlNodeModelIndex::AxisChild))); |
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99 m_current = StartElement; |
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100 break; |
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101 } |
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102 case QXmlNodeModelIndex::Document: |
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103 { |
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104 m_iterators.push(qMakePair(StartDocument, m_index.iterate(QXmlNodeModelIndex::AxisChild))); |
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105 m_current = StartDocument; |
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106 break; |
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107 } |
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108 case QXmlNodeModelIndex::Namespace: |
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109 { |
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110 m_current = Namespace; |
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111 break; |
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112 } |
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113 case QXmlNodeModelIndex::ProcessingInstruction: |
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114 { |
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115 m_current = ProcessingInstruction; |
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116 break; |
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117 } |
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118 case QXmlNodeModelIndex::Text: |
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119 { |
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120 m_current = Text; |
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121 break; |
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122 } |
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123 } |
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124 } |
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125 } |
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126 else |
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127 { |
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128 if(m_iterators.isEmpty()) |
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129 m_current = EndOfInput; |
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130 else |
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131 { |
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132 switch(m_iterators.top().first) |
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133 { |
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134 case StartOfInput: |
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135 { |
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136 m_current = EndOfInput; |
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137 break; |
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138 } |
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139 case StartElement: |
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140 { |
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141 m_current = EndElement; |
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142 m_iterators.pop(); |
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143 break; |
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144 } |
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145 case StartDocument: |
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146 { |
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147 m_current = EndDocument; |
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148 m_iterators.pop(); |
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149 break; |
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150 } |
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151 default: |
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152 { |
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153 Q_ASSERT_X(false, Q_FUNC_INFO, |
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154 "Invalid value."); |
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155 m_current = EndOfInput; |
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156 } |
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157 } |
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158 } |
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159 |
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160 } |
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161 |
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162 return m_current; |
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163 } |
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164 |
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165 AbstractXmlPullProvider::Event PullBridge::current() const |
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166 { |
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167 return m_current; |
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168 } |
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169 |
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170 QXmlNodeModelIndex PullBridge::index() const |
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171 { |
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172 return m_index; |
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173 } |
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174 |
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175 QSourceLocation PullBridge::sourceLocation() const |
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176 { |
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177 return m_index.model()->sourceLocation(m_index); |
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178 } |
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179 |
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180 QXmlName PullBridge::name() const |
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181 { |
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182 return m_index.name(); |
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183 } |
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184 |
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185 QVariant PullBridge::atomicValue() const |
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186 { |
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187 return QVariant(); |
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188 } |
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189 |
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190 QString PullBridge::stringValue() const |
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191 { |
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192 return QString(); |
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193 } |
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194 |
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195 QHash<QXmlName, QString> PullBridge::attributes() |
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196 { |
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197 Q_ASSERT(m_current == StartElement); |
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198 |
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199 QHash<QXmlName, QString> attributes; |
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200 |
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201 QXmlNodeModelIndex::Iterator::Ptr it = m_index.iterate(QXmlNodeModelIndex::AxisAttribute); |
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202 QXmlNodeModelIndex index = it->next(); |
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203 while (!index.isNull()) { |
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204 const Item attribute(index); |
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205 attributes.insert(index.name(), index.stringValue()); |
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206 |
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207 index = it->next(); |
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208 } |
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209 |
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210 return attributes; |
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211 } |
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212 |
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213 QHash<QXmlName, QXmlItem> PullBridge::attributeItems() |
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214 { |
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215 Q_ASSERT(m_current == StartElement); |
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216 |
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217 QHash<QXmlName, QXmlItem> attributes; |
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218 |
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219 QXmlNodeModelIndex::Iterator::Ptr it = m_index.iterate(QXmlNodeModelIndex::AxisAttribute); |
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220 QXmlNodeModelIndex index = it->next(); |
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221 while (!index.isNull()) { |
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222 const Item attribute(index); |
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223 attributes.insert(index.name(), QXmlItem(index)); |
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224 |
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225 index = it->next(); |
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226 } |
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227 |
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228 return attributes; |
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229 } |
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230 |
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231 QT_END_NAMESPACE |
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232 |