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