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 SqlXml ()
  51                 {
  52                         notNull = false;
  53                         xmlValue = null;
  54                 }
  55
  56                 public SqlXml (Stream value)
  57                 {
  58                         if (value == null) {
  59                                 notNull = false;
  60                                 xmlValue = null;
  61                         } else {
  62                                 int len = (int) value.Length;
  63
  64                                 if (len < 1) {
  65                                         xmlValue = String.Empty;
  66                                 } else {
  67                                         int bufSize = 8192;
  68                                         StringBuilder sb = new StringBuilder (len);
  69
  70                                         value.Position = 0;
  71                                         // Now read value into a byte buffer.
  72                                         byte [] bytes = null;
  73
  74                                         if (len < bufSize)
  75                                                 bufSize = len;
  76                                         bytes = new byte [bufSize];
  77
  78                                         while (len > 0) {
  79                                                 // Read may return anything from 0 to bufSize.
  80                                                 int n = value.Read(bytes, 0, bufSize);
  81                                                 sb.Append (Encoding.Unicode.GetString (bytes, 0, n));
  82
  83                                                 // The end of the file is reached.
  84                                                 if (n==0)
  85                                                     break;
  86                                                 len -= n;
  87                                         }
  88                                         xmlValue = sb.ToString ();
  89                                 }
  90                                 notNull = true;
  91                         }
  92                 }
  93
  94                 public SqlXml (XmlReader value)
  95                 {
  96                         if (value == null) {
  97                                 notNull = false;
  98                                 xmlValue = null;
  99                         } else {
 100                                 if (value.Read ()) {
 101                                         value.MoveToContent ();
 102                                         xmlValue = value.ReadOuterXml();
 103                                 } else
 104                                         xmlValue = String.Empty;
 105                                 notNull = true;
 106                         }
 107                 }
 108
 109                 public bool IsNull {
 110                         get { return !notNull; }
 111                 }
 112
 113                 public static SqlXml Null {
 114                         get {
 115                                 return new SqlXml ();
 116                         }
 117                 }
 118
 119                 public string Value {
 120                         get {
 121                                 if (notNull)
 122                                         return xmlValue;
 123                                 throw new SqlNullValueException ();
 124                         }
 125                 }
 126
 127                 public static XmlQualifiedName GetXsdType (XmlSchemaSet schemaSet)
 128                 {
 129                         XmlQualifiedName qualifiedName = new XmlQualifiedName ("anyType", "http://www.w3.org/2001/XMLSchema");
 130                         return qualifiedName;
 131                 }
 132
 133                 public XmlReader CreateReader ()
 134                 {
 135                         if (notNull) {
 136                                 XmlReaderSettings xs = new XmlReaderSettings ();
 137                                 xs.ConformanceLevel = ConformanceLevel.Fragment;
 138                                 return XmlTextReader.Create (new StringReader (xmlValue), xs);
 139                         } else
 140                                 throw new SqlNullValueException ();
 141                 }
 142
 143                 [MonoTODO]
 144                 XmlSchema IXmlSerializable.GetSchema ()
 145                 {
 146                         throw new NotImplementedException ();
 147                 }
 148
 149                 [MonoTODO]
 150                 void IXmlSerializable.ReadXml (XmlReader r)
 151                 {
 152                         throw new NotImplementedException ();
 153                 }
 154
 155                 [MonoTODO]
 156                 void IXmlSerializable.WriteXml (XmlWriter writer)
 157                 {
 158                         throw new NotImplementedException ();
 159                 }
 160         }
 161 }
 162
 163 #endif