mcs/class/System.ServiceModel.Web/System.Runtime.Serialization.Json/DataContractJsonSerializer.cs

   1 //
   2 // DataContractJsonSerializer.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto  <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2007-2008 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 using System;
  29 using System.Collections;
  30 using System.Collections.Generic;
  31 using System.Collections.ObjectModel;
  32 using System.Globalization;
  33 using System.IO;
  34 using System.Reflection;
  35 using System.Text;
  36 using System.Xml;
  37
  38 namespace System.Runtime.Serialization.Json
  39 {
  40         public sealed class DataContractJsonSerializer : XmlObjectSerializer
  41         {
  42                 const string default_root_name = "root";
  43
  44                 #region lengthy constructor list
  45
  46                 public DataContractJsonSerializer (Type type)
  47                         : this (type, Type.EmptyTypes)
  48                 {
  49                 }
  50
  51                 public DataContractJsonSerializer (Type type, IEnumerable<Type> knownTypes)
  52                         : this (type, default_root_name, knownTypes)
  53                 {
  54                 }
  55
  56                 public DataContractJsonSerializer (Type type, string rootName)
  57                         : this (type, rootName, Type.EmptyTypes)
  58                 {
  59                 }
  60
  61                 public DataContractJsonSerializer (Type type, XmlDictionaryString rootName)
  62                         : this (type, rootName != null ? rootName.Value : default_root_name, Type.EmptyTypes)
  63                 {
  64                 }
  65
  66                 public DataContractJsonSerializer (Type type, string rootName, IEnumerable<Type> knownTypes)
  67                         : this (type, rootName, knownTypes, int.MaxValue, false, false)
  68                 {
  69                 }
  70
  71                 public DataContractJsonSerializer (Type type, XmlDictionaryString rootName, IEnumerable<Type> knownTypes)
  72                         : this (type, rootName != null ? rootName.Value : default_root_name, knownTypes)
  73                 {
  74                 }
  75
  76         DataContractJsonSerializer(Type type, string rootName, IEnumerable<Type> knownTypes, int maxItemsInObjectGraph, bool ignoreExtensionDataObject, bool alwaysEmitTypeInformation)
  77         {
  78             if (type == null)
  79                                 throw new ArgumentNullException ("type");
  80                         if (rootName == null)
  81                                 throw new ArgumentNullException ("rootName");
  82                         if (maxItemsInObjectGraph < 0)
  83                                 throw new ArgumentOutOfRangeException ("maxItemsInObjectGraph");
  84
  85                         List<Type> types = new List<Type> ();
  86                         types.Add (type);
  87                         if (knownTypes != null)
  88                                 types.AddRange (knownTypes);
  89
  90                         this.type = type;
  91                         known_types = new ReadOnlyCollection<Type> (types);
  92                         root = rootName;
  93                         max_items = maxItemsInObjectGraph;
  94                         ignore_extension = ignoreExtensionDataObject;
  95                         always_emit_type = alwaysEmitTypeInformation;
  96                 }
  97
  98 #if !NET_2_1 || MONOTOUCH
  99                 public DataContractJsonSerializer (Type type, IEnumerable<Type> knownTypes, int maxItemsInObjectGraph, bool ignoreExtensionDataObject, IDataContractSurrogate dataContractSurrogate, bool alwaysEmitTypeInformation)
 100             : this (type, default_root_name, knownTypes, maxItemsInObjectGraph, ignoreExtensionDataObject, alwaysEmitTypeInformation)
 101                 {
 102         }
 103
 104                 public DataContractJsonSerializer (Type type, string rootName, IEnumerable<Type> knownTypes, int maxItemsInObjectGraph, bool ignoreExtensionDataObject, IDataContractSurrogate dataContractSurrogate, bool alwaysEmitTypeInformation)
 105                         : this (type, rootName, knownTypes, maxItemsInObjectGraph, ignoreExtensionDataObject, alwaysEmitTypeInformation)
 106                 {
 107                         surrogate = dataContractSurrogate;
 108                 }
 109
 110                 public DataContractJsonSerializer (Type type, XmlDictionaryString rootName, IEnumerable<Type> knownTypes, int maxItemsInObjectGraph, bool ignoreExtensionDataObject, IDataContractSurrogate dataContractSurrogate, bool alwaysEmitTypeInformation)
 111                         : this (type, rootName != null ? rootName.Value : default_root_name, knownTypes, maxItemsInObjectGraph, ignoreExtensionDataObject, dataContractSurrogate, alwaysEmitTypeInformation)
 112                 {
 113                 }
 114 #endif
 115
 116         #endregion
 117
 118         Type type;
 119                 string root;
 120                 ReadOnlyCollection<Type> known_types;
 121                 int max_items;
 122                 bool ignore_extension;
 123                 bool always_emit_type;
 124 #if !NET_2_1 || MONOTOUCH
 125                 IDataContractSurrogate surrogate;
 126
 127                 [MonoTODO]
 128                 public IDataContractSurrogate DataContractSurrogate {
 129                         get { return surrogate; }
 130                 }
 131 #endif
 132
 133                 [MonoTODO]
 134                 public bool IgnoreExtensionDataObject {
 135                         get { return ignore_extension; }
 136                 }
 137
 138                 [MonoTODO]
 139                 public ReadOnlyCollection<Type> KnownTypes {
 140                         get { return known_types; }
 141                 }
 142
 143                 public int MaxItemsInObjectGraph {
 144                         get { return max_items; }
 145                 }
 146
 147                 public override bool IsStartObject (XmlReader reader)
 148                 {
 149                         if (reader == null)
 150                                 throw new ArgumentNullException ("reader");
 151                         reader.MoveToContent ();
 152                         return reader.IsStartElement (root, String.Empty);
 153                 }
 154
 155                 public override bool IsStartObject (XmlDictionaryReader reader)
 156                 {
 157                         return IsStartObject ((XmlReader) reader);
 158                 }
 159
 160                 public override object ReadObject (Stream stream)
 161                 {
 162 #if NET_2_1
 163                         var r = (JsonReader) JsonReaderWriterFactory.CreateJsonReader(stream, XmlDictionaryReaderQuotas.Max);
 164                         r.LameSilverlightLiteralParser = true;
 165                         return ReadObject(r);
 166 #else
 167                         return ReadObject (JsonReaderWriterFactory.CreateJsonReader (stream, new XmlDictionaryReaderQuotas ()));
 168 #endif
 169                 }
 170
 171                 public override object ReadObject (XmlDictionaryReader reader)
 172                 {
 173                         return ReadObject (reader, true);
 174                 }
 175
 176                 public override object ReadObject (XmlReader reader)
 177                 {
 178                         return ReadObject (reader, true);
 179                 }
 180
 181                 public override object ReadObject (XmlDictionaryReader reader, bool verifyObjectName)
 182                 {
 183                         return ReadObject ((XmlReader) reader, verifyObjectName);
 184                 }
 185
 186                 public override object ReadObject (XmlReader reader, bool verifyObjectName)
 187                 {
 188                         if (reader == null)
 189                                 throw new ArgumentNullException ("reader");
 190                         try {
 191                                 if (verifyObjectName && !IsStartObject (reader))
 192                                         throw new SerializationException (String.Format ("Expected element was '{0}', but the actual input element was '{1}' in namespace '{2}'", root, reader.LocalName, reader.NamespaceURI));
 193
 194                                 return new JsonSerializationReader (this, reader, type, verifyObjectName).ReadRoot ();
 195                         } catch (SerializationException) {
 196                                 throw;
 197                         } catch (Exception ex) {
 198                                 throw new SerializationException ("Deserialization has failed", ex);
 199                         }
 200                 }
 201
 202                 public override void WriteObject (Stream stream, object graph)
 203                 {
 204                         using (var xw = JsonReaderWriterFactory.CreateJsonWriter (stream))
 205                                 WriteObject (xw, graph);
 206                 }
 207
 208                 public override void WriteObject (XmlWriter writer, object graph)
 209                 {
 210                         try {
 211                                 WriteStartObject (writer, graph);
 212                                 WriteObjectContent (writer, graph);
 213                                 WriteEndObject (writer);
 214                         } catch (NotImplementedException) {
 215                                 throw;
 216                         } catch (InvalidDataContractException) {
 217                                 throw;
 218                         } catch (Exception ex) {
 219                                 throw new SerializationException (String.Format ("There was an error during serialization for object of type {0}", graph != null ? graph.GetType () : null), ex);
 220                         }
 221                 }
 222
 223                 public override void WriteObject (XmlDictionaryWriter writer, object graph)
 224                 {
 225                         WriteObject ((XmlWriter) writer, graph);
 226                 }
 227
 228                 public override void WriteStartObject (XmlDictionaryWriter writer, object graph)
 229                 {
 230                         WriteStartObject ((XmlWriter) writer, graph);
 231                 }
 232
 233                 public override void WriteStartObject (XmlWriter writer, object graph)
 234                 {
 235                         if (writer == null)
 236                                 throw new ArgumentNullException ("writer");
 237                         writer.WriteStartElement (root);
 238                 }
 239
 240                 public override void WriteObjectContent (XmlDictionaryWriter writer, object graph)
 241                 {
 242                         WriteObjectContent ((XmlWriter) writer, graph);
 243                 }
 244
 245                 public override void WriteObjectContent (XmlWriter writer, object graph)
 246                 {
 247                         new JsonSerializationWriter (this, writer, type, always_emit_type).WriteObjectContent (graph, true, false);
 248                 }
 249
 250                 public override void WriteEndObject (XmlDictionaryWriter writer)
 251                 {
 252                         WriteEndObject ((XmlWriter) writer);
 253                 }
 254
 255                 public override void WriteEndObject (XmlWriter writer)
 256                 {
 257                         if (writer == null)
 258                                 throw new ArgumentNullException ("writer");
 259                         writer.WriteEndElement ();
 260                 }
 261         }
 262 }