2 // SubtreeXmlReader.cs - reads descendant nodes in XmlReader
5 // Atsushi Enomoto <atsushi@ximian.com>
7 // Copyright (c) 2004 Novell Inc. All rights reserved
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 using System.Collections.Generic;
34 using System.Xml.Schema;
38 internal class SubtreeXmlReader : XmlReader, IXmlLineInfo, IXmlNamespaceResolver
46 IXmlNamespaceResolver nsResolver;
48 public SubtreeXmlReader (XmlReader reader)
51 li = reader as IXmlLineInfo;
52 nsResolver = reader as IXmlNamespaceResolver;
54 startDepth = reader.Depth;
55 if (reader.ReadState == ReadState.Initial)
56 startDepth = -1; // end == the reader's end
59 public override int AttributeCount {
60 get { return initial ? 0 : Reader.AttributeCount; }
63 public override bool CanReadBinaryContent {
64 get { return Reader.CanReadBinaryContent; }
67 public override bool CanReadValueChunk {
68 get { return Reader.CanReadValueChunk; }
71 public override int Depth {
72 get { return Reader.Depth - startDepth; }
75 public override string BaseURI {
76 get { return Reader.BaseURI; }
79 public override bool EOF {
80 get { return eof || Reader.EOF; }
83 public int LineNumber {
84 get { return initial ? 0 : li != null ? li.LineNumber : 0; }
87 public int LinePosition {
88 get { return initial ? 0 : li != null ? li.LinePosition : 0; }
91 public override bool HasValue {
92 get { return initial ? false : Reader.HasValue; }
95 public override string LocalName {
96 get { return initial ? String.Empty : Reader.LocalName; }
99 public override string Name {
100 get { return initial ? String.Empty : Reader.Name; }
103 public override XmlNameTable NameTable {
104 get { return Reader.NameTable; }
107 public override string NamespaceURI {
108 get { return initial ? String.Empty : Reader.NamespaceURI; }
111 public override XmlNodeType NodeType {
112 get { return initial ? XmlNodeType.None : Reader.NodeType; }
115 public override string Prefix {
116 get { return initial ? String.Empty : Reader.Prefix; }
119 public override ReadState ReadState {
120 get { return initial ? ReadState.Initial : eof ? ReadState.EndOfFile : Reader.ReadState ; }
123 public override IXmlSchemaInfo SchemaInfo {
124 get { return Reader.SchemaInfo; }
127 public override XmlReaderSettings Settings {
128 get { return Reader.Settings; }
131 public override string Value {
132 get { return initial ? String.Empty : Reader.Value; }
135 public override void Close ()
140 public override string GetAttribute (int i)
142 return initial ? null : Reader.GetAttribute (i);
145 public override string GetAttribute (string name)
147 return initial ? null : Reader.GetAttribute (name);
150 public override string GetAttribute (string local, string ns)
152 return initial ? null : Reader.GetAttribute (local, ns);
155 IDictionary<string, string> IXmlNamespaceResolver.GetNamespacesInScope (XmlNamespaceScope scope)
157 return nsResolver != null ? nsResolver.GetNamespacesInScope (scope) :
158 new Dictionary<string, string> ();
161 public bool HasLineInfo ()
163 return li != null ? li.HasLineInfo () : false;
166 public override string LookupNamespace (string prefix)
168 return Reader.LookupNamespace (prefix);
171 string IXmlNamespaceResolver.LookupPrefix (string ns)
173 return nsResolver != null ? nsResolver.LookupPrefix (ns) : String.Empty;
176 public override bool MoveToFirstAttribute ()
178 return initial ? false : Reader.MoveToFirstAttribute ();
181 public override bool MoveToNextAttribute ()
183 return initial ? false : Reader.MoveToNextAttribute ();
186 public override void MoveToAttribute (int i)
189 Reader.MoveToAttribute (i);
192 public override bool MoveToAttribute (string name)
194 return initial ? false : Reader.MoveToAttribute (name);
197 public override bool MoveToAttribute (string local, string ns)
199 return initial ? false : Reader.MoveToAttribute (local, ns);
202 public override bool MoveToElement ()
204 return initial ? false : Reader.MoveToElement ();
207 public override bool Read ()
215 return !Reader.IsEmptyElement && Reader.Read ();
217 if (Reader.Depth > startDepth)
224 public override bool ReadAttributeValue ()
228 return Reader.ReadAttributeValue ();
231 public override void ResolveEntity ()
235 Reader.ResolveEntity ();