mcs/class/System.XML/System.Xml/XmlEntity.cs

   1 //
   2 // System.Xml.XmlEntity.cs
   3 //
   4 // Author:
   5 //      Duncan Mak  (duncan@ximian.com)
   6 //      Atsushi Enomoto  (atsushi@ximian.com)
   7 //
   8 // (C) Ximian, Inc.
   9 // (C) 2004 Novell Inc.
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 using Mono.Xml;
  33
  34 namespace System.Xml
  35 {
  36         public class XmlEntity : XmlNode
  37         {
  38                 #region Constructors
  39
  40                 internal XmlEntity (string name, string NDATA, string publicId, string systemId,
  41                                     XmlDocument doc)
  42                         : base (doc)
  43                 {
  44                         this.name = doc.NameTable.Add (name);
  45                         this.NDATA = NDATA;
  46                         this.publicId = publicId;
  47                         this.systemId = systemId;
  48                         this.baseUri = doc.BaseURI;
  49                 }
  50
  51                 #endregion
  52
  53                 #region Fields
  54
  55                 string name;
  56                 string NDATA;
  57                 string publicId;
  58                 string systemId;
  59                 string baseUri;
  60
  61                 #endregion
  62
  63                 #region Properties
  64
  65                 public override string BaseURI {
  66                         get {  return baseUri; }
  67                 }
  68
  69                 public override string InnerText {
  70                         get { return base.InnerText; }
  71                         set { throw new InvalidOperationException ("This operation is not supported."); }
  72                 }
  73
  74                 public override string InnerXml {
  75                         get { return base.InnerXml; }
  76                         set { throw new InvalidOperationException ("This operation is not supported."); }
  77                 }
  78
  79                 public override bool IsReadOnly {
  80                         get { return true; } // always read-only.
  81                 }
  82
  83                 public override string LocalName {
  84                         get { return name; }
  85                 }
  86
  87                 public override string Name {
  88                         get { return name; }
  89                 }
  90
  91                 public override XmlNodeType NodeType {
  92                         get { return XmlNodeType.Entity; }
  93                 }
  94
  95                 public string NotationName {
  96                         get {
  97                                 if (NDATA == null)
  98                                         return null;
  99                                 else
 100                                         return NDATA;
 101                         }
 102                 }
 103
 104                 public override string OuterXml {
 105                         get { return String.Empty; }
 106                 }
 107
 108                 public string PublicId {
 109                         get {
 110                                 if (publicId == null)
 111                                         return null;
 112                                 else
 113                                         return publicId;
 114                         }
 115                 }
 116
 117                 public string SystemId {
 118                         get {
 119                                 if (publicId == null)
 120                                         return null;
 121                                 else
 122                                         return systemId;
 123                         }
 124                 }
 125                 #endregion
 126
 127                 #region Methods
 128
 129                 public override XmlNode CloneNode (bool deep)
 130                 {
 131                         throw new InvalidOperationException ("This operation is not supported.");
 132                 }
 133
 134                 public override void WriteContentTo (XmlWriter w)
 135                 {
 136                         // No effect.
 137                 }
 138
 139                 public override void WriteTo (XmlWriter w)
 140                 {
 141                         // No effect.
 142                 }
 143
 144                 internal void SetEntityContent ()
 145                 {
 146                         if (FirstChild != null)
 147                                 return;
 148
 149                         XmlDocumentType doctype = OwnerDocument.DocumentType;
 150
 151                         if (doctype == null)
 152                                 return;
 153
 154                         DTDEntityDeclaration decl = doctype.DTD.EntityDecls [name];
 155                         if (decl == null)
 156                                 return;
 157
 158                         XmlNameTable nt = this.OwnerDocument.NameTable;
 159                         XmlNamespaceManager nsmgr = this.ConstructNamespaceManager ();
 160                         XmlParserContext ctx = new XmlParserContext (OwnerDocument.NameTable, nsmgr,
 161                                 doctype != null ? doctype.DTD : null,
 162                                 BaseURI, XmlLang, XmlSpace, null);
 163                         XmlTextReader xmlReader = new XmlTextReader (decl.EntityValue, XmlNodeType.Element, ctx);
 164                         xmlReader.XmlResolver = OwnerDocument.Resolver;
 165
 166                         do {
 167                                 XmlNode n = OwnerDocument.ReadNode (xmlReader);
 168                                 if(n == null) break;
 169                                 InsertBefore (n, null, false, false);
 170                         } while (true);
 171
 172                         SetReadOnly (this);
 173                 }
 174                 #endregion
 175         }
 176 }