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 //
   7 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   8 //
   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:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  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.
  27 //
  28
  29 using System;
  30 using System.IO;
  31 using System.Xml;
  32 using System.Xml.Schema;
  33 using System.Globalization;
  34 using System.Threading;
  35 using System.Xml.Serialization;
  36 using System.Text;
  37
  38 #if NET_2_0
  39
  40 namespace System.Data.SqlTypes
  41 {
  42         [SerializableAttribute]
  43         [XmlSchemaProvider ("GetXsdType")]
  44         public sealed class SqlXml : INullable, IXmlSerializable
  45         {
  46                 bool notNull;
  47                 string xmlValue;
  48
  49                 public SqlXml ()
  50                 {
  51                         notNull = false;
  52                         xmlValue = null;
  53                 }
  54
  55                 public SqlXml (Stream value)
  56                 {
  57                         if (value == null) {
  58                                 notNull = false;
  59                                 xmlValue = null;
  60                         } else {
  61                                 int len = (int) value.Length;
  62                                 int bufSize = 8192;
  63                                 StringBuilder sb = new StringBuilder (len);
  64
  65                                 value.Position = 0;
  66                                 // Now read value into a byte buffer.
  67                                 byte [] bytes = null;
  68
  69                                 if (len < bufSize)
  70                                         bufSize = len;
  71                                 bytes = new byte [bufSize];
  72
  73                                 while (len > 0) {
  74                                     // Read may return anything from 0 to numBytesToRead.
  75                                     int n = value.Read(bytes, 0, bufSize);
  76                                         sb.Append (Encoding.Unicode.GetString (bytes, 0, n));
  77
  78                                     // The end of the file is reached.
  79                                     if (n==0)
  80                                         break;
  81                                     len -= n;
  82                                 }
  83                                 xmlValue = sb.ToString ();
  84                                 notNull = true;
  85                         }
  86                 }
  87
  88                 public SqlXml (XmlReader value)
  89                 {
  90                         if (value == null) {
  91                                 notNull = false;
  92                                 xmlValue = null;
  93                         } else {
  94                                 value.MoveToContent ();
  95                                 xmlValue = value.ReadOuterXml();
  96                                 notNull = true;
  97                         }
  98                 }
  99
 100                 public bool IsNull {
 101                         get { return !notNull; }
 102                 }
 103
 104                 public static SqlXml Null {
 105                         get {
 106                                 return new SqlXml ();
 107                         }
 108                 }
 109
 110                 public string Value {
 111                         get {
 112                                 return xmlValue;
 113                         }
 114                 }
 115
 116                 public static XmlQualifiedName GetXsdType (XmlSchemaSet schemaSet)
 117                 {
 118                         XmlQualifiedName qualifiedName = new XmlQualifiedName ("anyType", "http://www.w3.org/2001/XMLSchema");
 119                         return qualifiedName;
 120                 }
 121
 122                 public XmlReader CreateReader ()
 123                 {
 124                         if (notNull)
 125                                 return XmlTextReader.Create (new StringReader (xmlValue));
 126                         else
 127                                 return null;
 128                 }
 129
 130                 [MonoTODO]
 131                 XmlSchema IXmlSerializable.GetSchema ()
 132                 {
 133                         throw new NotImplementedException ();
 134                 }
 135
 136                 [MonoTODO]
 137                 void IXmlSerializable.ReadXml (XmlReader r)
 138                 {
 139                         throw new NotImplementedException ();
 140                 }
 141
 142                 [MonoTODO]
 143                 void IXmlSerializable.WriteXml (XmlWriter writer)
 144                 {
 145                         throw new NotImplementedException ();
 146                 }
 147         }
 148 }
 149
 150 #endif