mcs/class/System.Data/System.Data.SqlTypes/SqlXml.cs

   1 //
   2 // System.Data.SqlTypes.SqlXml
   3 //
   4 // Author:
   5 //      Umadevi S (sumadevi@novell.com)
   6 //      Veerapuram Varadhan  (vvaradhan@novell.com>)
   7 //
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System;
  31 using System.IO;
  32 using System.Xml;
  33 using System.Xml.Schema;
  34 using System.Globalization;
  35 using System.Threading;
  36 using System.Xml.Serialization;
  37 using System.Text;
  38
  39 #if NET_2_0
  40
  41 namespace System.Data.SqlTypes
  42 {
  43         [SerializableAttribute]
  44         [XmlSchemaProvider ("GetXsdType")]
  45         public sealed class SqlXml : INullable, IXmlSerializable
  46         {
  47                 bool notNull;
  48                 string xmlValue;
  49
  50                 public static readonly SqlXml Null;
  51                 public SqlXml ()
  52                 {
  53                         notNull = false;
  54                         xmlValue = null;
  55                 }
  56
  57                 public SqlXml (Stream value)
  58                 {
  59                         if (value == null) {
  60                                 notNull = false;
  61                                 xmlValue = null;
  62                         } else {
  63                                 int len = (int) value.Length;
  64
  65                                 if (len < 1) {
  66                                         xmlValue = String.Empty;
  67                                 } else {
  68                                         int bufSize = 8192;
  69                                         StringBuilder sb = new StringBuilder (len);
  70
  71                                         value.Position = 0;
  72                                         // Now read value into a byte buffer.
  73                                         byte [] bytes = null;
  74
  75                                         if (len < bufSize)
  76                                                 bufSize = len;
  77                                         bytes = new byte [bufSize];
  78
  79                                         while (len > 0) {
  80                                                 // Read may return anything from 0 to bufSize.
  81                                                 int n = value.Read(bytes, 0, bufSize);
  82                                                 sb.Append (Encoding.ASCII.GetString (bytes, 0, n));
  83
  84                                                 // The end of the file is reached.
  85                                                 if (n==0)
  86                                                     break;
  87                                                 len -= n;
  88                                         }
  89                                         xmlValue = sb.ToString ();
  90                                 }
  91                                 notNull = true;
  92                         }
  93                 }
  94
  95                 public SqlXml (XmlReader value)
  96                 {
  97                         if (value == null) {
  98                                 notNull = false;
  99                                 xmlValue = null;
 100                         } else {
 101                                 value.MoveToContent ();
 102                                 xmlValue = value.ReadOuterXml();
 103                                 notNull = true;
 104                         }
 105                 }
 106
 107                 public bool IsNull {
 108                         get { return !notNull; }
 109                 }
 110
 111                 public static SqlXml Null {
 112                         get {
 113                                 return new SqlXml ();
 114                         }
 115                 }
 116
 117                 public string Value {
 118                         get {
 119                                 if (notNull)
 120                                         return xmlValue;
 121                                 throw new SqlNullValueException ();
 122                         }
 123                 }
 124
 125                 public static XmlQualifiedName GetXsdType (XmlSchemaSet schemaSet)
 126                 {
 127                         XmlQualifiedName qualifiedName = new XmlQualifiedName ("anyType", "http://www.w3.org/2001/XMLSchema");
 128                         return qualifiedName;
 129                 }
 130
 131                 public XmlReader CreateReader ()
 132                 {
 133                         if (notNull)
 134                                 return XmlTextReader.Create (new StringReader (xmlValue));
 135                         else
 136                                 return null;
 137                 }
 138
 139                 [MonoTODO]
 140                 XmlSchema IXmlSerializable.GetSchema ()
 141                 {
 142                         throw new NotImplementedException ();
 143                 }
 144
 145                 [MonoTODO]
 146                 void IXmlSerializable.ReadXml (XmlReader r)
 147                 {
 148                         throw new NotImplementedException ();
 149                 }
 150
 151                 [MonoTODO]
 152                 void IXmlSerializable.WriteXml (XmlWriter writer)
 153                 {
 154                         throw new NotImplementedException ();
 155                 }
 156         }
 157 }
 158
 159 #endif