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, null, true)
  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                 public DataContractJsonSerializer (Type type, IEnumerable<Type> knownTypes, int maxItemsInObjectGraph, bool ignoreExtensionDataObject, IDataContractSurrogate dataContractSurrogate, bool alwaysEmitTypeInformation)
  77                         : this (type, default_root_name, knownTypes, maxItemsInObjectGraph, ignoreExtensionDataObject, dataContractSurrogate, alwaysEmitTypeInformation)
  78                 {
  79                 }
  80
  81                 public DataContractJsonSerializer (Type type, string rootName, IEnumerable<Type> knownTypes, int maxItemsInObjectGraph, bool ignoreExtensionDataObject, IDataContractSurrogate dataContractSurrogate, bool alwaysEmitTypeInformation)
  82                 {
  83                         if (type == null)
  84                                 throw new ArgumentNullException ("type");
  85                         if (rootName == null)
  86                                 throw new ArgumentNullException ("rootName");
  87                         if (maxItemsInObjectGraph < 0)
  88                                 throw new ArgumentOutOfRangeException ("maxItemsInObjectGraph");
  89
  90                         List<Type> types = new List<Type> ();
  91                         types.Add (type);
  92                         if (knownTypes != null)
  93                                 types.AddRange (knownTypes);
  94
  95                         this.type = type;
  96                         known_types = new ReadOnlyCollection<Type> (types);
  97                         root = rootName;
  98                         max_items = maxItemsInObjectGraph;
  99                         ignore_extension = ignoreExtensionDataObject;
 100                         surrogate = dataContractSurrogate;
 101                         always_emit_type = alwaysEmitTypeInformation;
 102                 }
 103
 104                 public DataContractJsonSerializer (Type type, XmlDictionaryString rootName, IEnumerable<Type> knownTypes, int maxItemsInObjectGraph, bool ignoreExtensionDataObject, IDataContractSurrogate dataContractSurrogate, bool alwaysEmitTypeInformation)
 105                         : this (type, rootName != null ? rootName.Value : null, knownTypes, maxItemsInObjectGraph, ignoreExtensionDataObject, dataContractSurrogate, alwaysEmitTypeInformation)
 106                 {
 107                 }
 108
 109                 #endregion
 110
 111                 Type type;
 112                 string root;
 113                 ReadOnlyCollection<Type> known_types;
 114                 int max_items;
 115                 bool ignore_extension;
 116                 IDataContractSurrogate surrogate;
 117                 bool always_emit_type;
 118
 119                 [MonoTODO]
 120                 public IDataContractSurrogate DataContractSurrogate {
 121                         get { return surrogate; }
 122                 }
 123
 124                 [MonoTODO]
 125                 public bool IgnoreExtensionDataObject {
 126                         get { return ignore_extension; }
 127                 }
 128
 129                 [MonoTODO]
 130                 public ReadOnlyCollection<Type> KnownTypes {
 131                         get { return known_types; }
 132                 }
 133
 134                 public int MaxItemsInObjectGraph {
 135                         get { return max_items; }
 136                 }
 137
 138                 public override bool IsStartObject (XmlReader reader)
 139                 {
 140                         if (reader == null)
 141                                 throw new ArgumentNullException ("reader");
 142                         reader.MoveToContent ();
 143                         return reader.IsStartElement (root, String.Empty);
 144                 }
 145
 146                 public override bool IsStartObject (XmlDictionaryReader reader)
 147                 {
 148                         return IsStartObject ((XmlReader) reader);
 149                 }
 150
 151                 public override object ReadObject (Stream stream)
 152                 {
 153                         return ReadObject (JsonReaderWriterFactory.CreateJsonReader (stream, new XmlDictionaryReaderQuotas ()));
 154                 }
 155
 156                 public override object ReadObject (XmlDictionaryReader reader)
 157                 {
 158                         return ReadObject (reader, true);
 159                 }
 160
 161                 public override object ReadObject (XmlReader reader)
 162                 {
 163                         return ReadObject (reader, true);
 164                 }
 165
 166                 public override object ReadObject (XmlDictionaryReader reader, bool verifyObjectName)
 167                 {
 168                         return ReadObject ((XmlReader) reader, verifyObjectName);
 169                 }
 170
 171                 public override object ReadObject (XmlReader reader, bool verifyObjectName)
 172                 {
 173                         if (reader == null)
 174                                 throw new ArgumentNullException ("reader");
 175                         try {
 176                                 if (verifyObjectName && !IsStartObject (reader))
 177                                         throw new SerializationException (String.Format ("Expected element was '{0}', but the actual input element was '{1}' in namespace '{2}'", root, reader.LocalName, reader.NamespaceURI));
 178
 179                                 return new JsonSerializationReader (this, reader, type, verifyObjectName).ReadRoot ();
 180                         } catch (SerializationException) {
 181                                 throw;
 182                         } catch (Exception ex) {
 183                                 throw new SerializationException ("Deserialization has failed", ex);
 184                         }
 185                 }
 186
 187                 public override void WriteObject (Stream stream, object graph)
 188                 {
 189                         WriteObject (JsonReaderWriterFactory.CreateJsonWriter (stream), graph);
 190                 }
 191
 192                 public override void WriteObject (XmlWriter writer, object graph)
 193                 {
 194                         try {
 195                                 WriteStartObject (writer, graph);
 196                                 WriteObjectContent (writer, graph);
 197                                 WriteEndObject (writer);
 198                         } catch (NotImplementedException) {
 199                                 throw;
 200                         } catch (InvalidDataContractException) {
 201                                 throw;
 202                         } catch (Exception ex) {
 203                                 throw new SerializationException (String.Format ("There was an error during serialization for object of type {0}", graph != null ? graph.GetType () : null), ex);
 204                         }
 205                 }
 206
 207                 public override void WriteObject (XmlDictionaryWriter writer, object graph)
 208                 {
 209                         WriteObject ((XmlWriter) writer, graph);
 210                 }
 211
 212                 public override void WriteStartObject (XmlDictionaryWriter writer, object graph)
 213                 {
 214                         WriteStartObject ((XmlWriter) writer, graph);
 215                 }
 216
 217                 public override void WriteStartObject (XmlWriter writer, object graph)
 218                 {
 219                         if (writer == null)
 220                                 throw new ArgumentNullException ("writer");
 221                         writer.WriteStartElement (root);
 222                 }
 223
 224                 public override void WriteObjectContent (XmlDictionaryWriter writer, object graph)
 225                 {
 226                         WriteObjectContent ((XmlWriter) writer, graph);
 227                 }
 228
 229                 public override void WriteObjectContent (XmlWriter writer, object graph)
 230                 {
 231                         new JsonSerializationWriter (this, writer, type, always_emit_type).WriteObjectContent (graph, true, false);
 232                 }
 233
 234                 public override void WriteEndObject (XmlDictionaryWriter writer)
 235                 {
 236                         WriteEndObject ((XmlWriter) writer);
 237                 }
 238
 239                 public override void WriteEndObject (XmlWriter writer)
 240                 {
 241                         if (writer == null)
 242                                 throw new ArgumentNullException ("writer");
 243                         writer.WriteEndElement ();
 244                 }
 245         }
 246 }