2 // SubtreeXmlReader.cs - reads descendant nodes in XmlReader
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5 // Atsushi Enomoto <atsushi@ximian.com>
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7 // Copyright (c) 2004 Novell Inc. All rights reserved
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9 // Permission is hereby granted, free of charge, to any person obtaining
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10 // a copy of this software and associated documentation files (the
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11 // "Software"), to deal in the Software without restriction, including
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12 // without limitation the rights to use, copy, modify, merge, publish,
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13 // distribute, sublicense, and/or sell copies of the Software, and to
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14 // permit persons to whom the Software is furnished to do so, subject to
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15 // the following conditions:
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17 // The above copyright notice and this permission notice shall be
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18 // included in all copies or substantial portions of the Software.
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20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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32 using System.Collections;
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37 public class SubtreeXmlReader : XmlReader, IXmlLineInfo, IXmlNamespaceResolver
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45 IXmlNamespaceResolver nsResolver;
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47 public SubtreeXmlReader (XmlReader reader)
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49 this.Reader = reader;
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50 li = reader as IXmlLineInfo;
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51 nsResolver = reader as IXmlNamespaceResolver;
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53 startDepth = reader.Depth;
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54 if (reader.ReadState == ReadState.Initial)
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55 startDepth = -1; // end == the reader's end
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58 public override int AttributeCount {
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59 get { return initial ? 0 : Reader.AttributeCount; }
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62 public override int Depth {
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63 get { return Reader.Depth - startDepth; }
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66 public override string BaseURI {
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67 get { return Reader.BaseURI; }
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70 public override bool EOF {
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71 get { return eof || Reader.EOF; }
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74 public int LineNumber {
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75 get { return initial ? 0 : li != null ? li.LineNumber : 0; }
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78 public int LinePosition {
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79 get { return initial ? 0 : li != null ? li.LinePosition : 0; }
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82 public override bool HasValue {
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83 get { return initial ? false : Reader.HasValue; }
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86 public override string LocalName {
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87 get { return initial ? String.Empty : Reader.LocalName; }
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90 public override string Name {
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91 get { return initial ? String.Empty : Reader.Name; }
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94 public override XmlNameTable NameTable {
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95 get { return Reader.NameTable; }
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98 public override string NamespaceURI {
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99 get { return initial ? String.Empty : Reader.NamespaceURI; }
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102 public override XmlNodeType NodeType {
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103 get { return initial ? XmlNodeType.None : Reader.NodeType; }
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106 public override string Prefix {
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107 get { return initial ? String.Empty : Reader.Prefix; }
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110 public override ReadState ReadState {
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111 get { return initial ? ReadState.Initial : eof ? ReadState.EndOfFile : Reader.ReadState ; }
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114 public override XmlReaderSettings Settings {
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115 get { return Reader.Settings; }
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118 public override string Value {
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119 get { return initial ? String.Empty : Reader.Value; }
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122 public override void Close ()
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127 public override string GetAttribute (int i)
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129 return initial ? null : Reader.GetAttribute (i);
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132 public override string GetAttribute (string name)
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134 return initial ? null : Reader.GetAttribute (name);
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137 public override string GetAttribute (string local, string ns)
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139 return initial ? null : Reader.GetAttribute (local, ns);
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142 IDictionary IXmlNamespaceResolver.GetNamespacesInScope (XmlNamespaceScope scope)
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144 return nsResolver != null ? nsResolver.GetNamespacesInScope (scope) : new Hashtable ();
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147 public bool HasLineInfo ()
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149 return li != null ? li.HasLineInfo () : false;
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152 public override string LookupNamespace (string prefix)
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154 return Reader.LookupNamespace (prefix);
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157 string IXmlNamespaceResolver.LookupPrefix (string ns)
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159 return nsResolver != null ? nsResolver.LookupPrefix (ns) : String.Empty;
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162 string IXmlNamespaceResolver.LookupPrefix (string ns, bool atomizedNames)
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164 return nsResolver != null ? nsResolver.LookupPrefix (ns, atomizedNames) : String.Empty;
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167 public override bool MoveToFirstAttribute ()
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169 return initial ? false : Reader.MoveToFirstAttribute ();
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172 public override bool MoveToNextAttribute ()
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174 return initial ? false : Reader.MoveToNextAttribute ();
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177 public override void MoveToAttribute (int i)
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180 Reader.MoveToAttribute (i);
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183 public override bool MoveToAttribute (string name)
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185 return initial ? false : Reader.MoveToAttribute (name);
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188 public override bool MoveToAttribute (string local, string ns)
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190 return initial ? false : Reader.MoveToAttribute (local, ns);
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193 public override bool MoveToElement ()
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195 return initial ? false : Reader.MoveToElement ();
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198 public override bool Read ()
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206 return !Reader.IsEmptyElement && Reader.Read ();
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208 if (Reader.Depth > startDepth)
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209 if (Reader.Read ())
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215 public override bool ReadAttributeValue ()
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217 if (initial || eof)
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219 return Reader.ReadAttributeValue ();
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222 public override void ResolveEntity ()
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224 if (initial || eof)
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226 Reader.ResolveEntity ();
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