class/System.Json/System.Json/JsonValue.cs

   1 using System;
   2 using System.Collections;
   3 using System.Collections.Generic;
   4 using System.IO;
   5 using System.Linq;
   6 using System.Runtime.Serialization.Json;
   7 using System.Text;
   8
   9 using JsonPair = System.Collections.Generic.KeyValuePair<string, System.Json.JsonValue>;
  10
  11
  12 namespace System.Json
  13 {
  14         public abstract class JsonValue : IEnumerable
  15         {
  16                 public static JsonValue Load (Stream stream)
  17                 {
  18                         if (stream == null)
  19                                 throw new ArgumentNullException ("stream");
  20                         return Load (new JavaScriptObjectDeserializer.BufferedStreamReader (stream));
  21                 }
  22
  23                 public static JsonValue Load (TextReader textReader)
  24                 {
  25                         if (textReader == null)
  26                                 throw new ArgumentNullException ("textReader");
  27
  28                         var ret = new JavaScriptObjectDeserializer (textReader.ReadToEnd (), true).BasicDeserialize ();
  29
  30                         return ToJsonValue (ret);
  31                 }
  32
  33                 static IEnumerable<KeyValuePair<string,JsonValue>> ToJsonPairEnumerable (IEnumerable<KeyValuePair<string,object>> kvpc)
  34                 {
  35                         foreach (var kvp in kvpc)
  36                                 yield return new KeyValuePair<string,JsonValue> (kvp.Key, ToJsonValue (kvp.Value));
  37                 }
  38
  39                 static IEnumerable<JsonValue> ToJsonValueEnumerable (IEnumerable<object> arr)
  40                 {
  41                         foreach (var obj in arr)
  42                                 yield return ToJsonValue (obj);
  43                 }
  44
  45                 static JsonValue ToJsonValue (object ret)
  46                 {
  47                         if (ret == null)
  48                                 return null;
  49                         var kvpc = ret as IEnumerable<KeyValuePair<string,object>>;
  50                         if (kvpc != null)
  51                                 return new JsonObject (ToJsonPairEnumerable (kvpc));
  52                         var arr = ret as IEnumerable<object>;
  53                         if (arr != null)
  54                                 return new JsonArray (ToJsonValueEnumerable (arr));
  55
  56                         if (ret is bool)
  57                                 return new JsonPrimitive ((bool) ret);
  58                         if (ret is byte)
  59                                 return new JsonPrimitive ((byte) ret);
  60                         if (ret is char)
  61                                 return new JsonPrimitive ((char) ret);
  62                         if (ret is decimal)
  63                                 return new JsonPrimitive ((decimal) ret);
  64                         if (ret is double)
  65                                 return new JsonPrimitive ((double) ret);
  66                         if (ret is float)
  67                                 return new JsonPrimitive ((float) ret);
  68                         if (ret is int)
  69                                 return new JsonPrimitive ((int) ret);
  70                         if (ret is long)
  71                                 return new JsonPrimitive ((long) ret);
  72                         if (ret is sbyte)
  73                                 return new JsonPrimitive ((sbyte) ret);
  74                         if (ret is short)
  75                                 return new JsonPrimitive ((short) ret);
  76                         if (ret is string)
  77                                 return new JsonPrimitive ((string) ret);
  78                         if (ret is uint)
  79                                 return new JsonPrimitive ((uint) ret);
  80                         if (ret is ulong)
  81                                 return new JsonPrimitive ((ulong) ret);
  82                         if (ret is ushort)
  83                                 return new JsonPrimitive ((ushort) ret);
  84                         if (ret is DateTime)
  85                                 return new JsonPrimitive ((DateTime) ret);
  86                         if (ret is DateTimeOffset)
  87                                 return new JsonPrimitive ((DateTimeOffset) ret);
  88                         if (ret is Guid)
  89                                 return new JsonPrimitive ((Guid) ret);
  90                         if (ret is TimeSpan)
  91                                 return new JsonPrimitive ((TimeSpan) ret);
  92                         if (ret is Uri)
  93                                 return new JsonPrimitive ((Uri) ret);
  94                         throw new NotSupportedException (String.Format ("Unexpected parser return type: {0}", ret.GetType ()));
  95                 }
  96
  97                 public static JsonValue Parse (string jsonString)
  98                 {
  99                         if (jsonString == null)
 100                                 throw new ArgumentNullException ("jsonString");
 101                         return Load (new StringReader (jsonString));
 102                 }
 103
 104                 public virtual int Count {
 105                         get { throw new InvalidOperationException (); }
 106                 }
 107
 108                 public abstract JsonType JsonType { get; }
 109
 110                 public virtual JsonValue this [int index] {
 111                         get { throw new InvalidOperationException (); }
 112                         set { throw new InvalidOperationException (); }
 113                 }
 114
 115                 public virtual JsonValue this [string key] {
 116                         get { throw new InvalidOperationException (); }
 117                         set { throw new InvalidOperationException (); }
 118                 }
 119
 120                 public virtual bool ContainsKey (string key)
 121                 {
 122                         throw new InvalidOperationException ();
 123                 }
 124
 125                 public virtual void Save (Stream stream)
 126                 {
 127                         if (stream == null)
 128                                 throw new ArgumentNullException ("stream");
 129                         Save (new StreamWriter (stream));
 130                 }
 131
 132                 public virtual void Save (TextWriter textWriter)
 133                 {
 134                         if (textWriter == null)
 135                                 throw new ArgumentNullException ("textWriter");
 136                         SaveInternal (textWriter);
 137                 }
 138
 139                 void SaveInternal (TextWriter w)
 140                 {
 141                         switch (JsonType) {
 142                         case JsonType.Object:
 143                                 w.Write ('{');
 144                                 bool following = false;
 145                                 foreach (JsonPair pair in ((JsonObject) this)) {
 146                                         if (following)
 147                                                 w.Write (", ");
 148                                         w.Write ('\"');
 149                                         w.Write (EscapeString (pair.Key));
 150                                         w.Write ("\": ");
 151                                         pair.Value.SaveInternal (w);
 152                                         following = true;
 153                                 }
 154                                 w.Write ('}');
 155                                 break;
 156                         case JsonType.Array:
 157                                 w.Write ('[');
 158                                 following = false;
 159                                 foreach (JsonValue v in ((JsonArray) this)) {
 160                                         if (following)
 161                                                 w.Write (", ");
 162                                         v.SaveInternal (w);
 163                                         following = true;
 164                                 }
 165                                 w.Write (']');
 166                                 break;
 167                         case JsonType.Boolean:
 168                                 w.Write ((bool) this ? "true" : "false");
 169                                 break;
 170                         case JsonType.String:
 171                                 w.Write ('"');
 172                                 w.Write (EscapeString (((JsonPrimitive) this).GetFormattedString ()));
 173                                 w.Write ('"');
 174                                 break;
 175                         default:
 176                                 w.Write (((JsonPrimitive) this).GetFormattedString ());
 177                                 break;
 178                         }
 179                 }
 180
 181                 public override string ToString ()
 182                 {
 183                         StringWriter sw = new StringWriter ();
 184                         Save (sw);
 185                         return sw.ToString ();
 186                 }
 187
 188                 IEnumerator IEnumerable.GetEnumerator ()
 189                 {
 190                         throw new InvalidOperationException ();
 191                 }
 192
 193                 internal string EscapeString (string src)
 194                 {
 195                         if (src == null)
 196                                 return null;
 197
 198                         for (int i = 0; i < src.Length; i++)
 199                                 if (src [i] == '"' || src [i] == '\\') {
 200                                         var sb = new StringBuilder ();
 201                                         if (i > 0)
 202                                                 sb.Append (src, 0, i);
 203                                         return DoEscapeString (sb, src, i);
 204                                 }
 205                         return src;
 206                 }
 207
 208                 string DoEscapeString (StringBuilder sb, string src, int cur)
 209                 {
 210                         int start = cur;
 211                         for (int i = cur; i < src.Length; i++)
 212                                 if (src [i] == '"' || src [i] == '\\') {
 213                                         sb.Append (src, start, i - start);
 214                                         sb.Append ('\\');
 215                                         sb.Append (src [i++]);
 216                                         start = i;
 217                                 }
 218                         sb.Append (src, start, src.Length - start);
 219                         return sb.ToString ();
 220                 }
 221
 222                 // CLI -> JsonValue
 223
 224                 public static implicit operator JsonValue (bool value)
 225                 {
 226                         return new JsonPrimitive (value);
 227                 }
 228
 229                 public static implicit operator JsonValue (byte value)
 230                 {
 231                         return new JsonPrimitive (value);
 232                 }
 233
 234                 public static implicit operator JsonValue (char value)
 235                 {
 236                         return new JsonPrimitive (value);
 237                 }
 238
 239                 public static implicit operator JsonValue (decimal value)
 240                 {
 241                         return new JsonPrimitive (value);
 242                 }
 243
 244                 public static implicit operator JsonValue (double value)
 245                 {
 246                         return new JsonPrimitive (value);
 247                 }
 248
 249                 public static implicit operator JsonValue (float value)
 250                 {
 251                         return new JsonPrimitive (value);
 252                 }
 253
 254                 public static implicit operator JsonValue (int value)
 255                 {
 256                         return new JsonPrimitive (value);
 257                 }
 258
 259                 public static implicit operator JsonValue (long value)
 260                 {
 261                         return new JsonPrimitive (value);
 262                 }
 263
 264                 public static implicit operator JsonValue (sbyte value)
 265                 {
 266                         return new JsonPrimitive (value);
 267                 }
 268
 269                 public static implicit operator JsonValue (short value)
 270                 {
 271                         return new JsonPrimitive (value);
 272                 }
 273
 274                 public static implicit operator JsonValue (string value)
 275                 {
 276                         return new JsonPrimitive (value);
 277                 }
 278
 279                 public static implicit operator JsonValue (uint value)
 280                 {
 281                         return new JsonPrimitive (value);
 282                 }
 283
 284                 public static implicit operator JsonValue (ulong value)
 285                 {
 286                         return new JsonPrimitive (value);
 287                 }
 288
 289                 public static implicit operator JsonValue (ushort value)
 290                 {
 291                         return new JsonPrimitive (value);
 292                 }
 293
 294                 public static implicit operator JsonValue (DateTime value)
 295                 {
 296                         return new JsonPrimitive (value);
 297                 }
 298
 299                 public static implicit operator JsonValue (DateTimeOffset value)
 300                 {
 301                         return new JsonPrimitive (value);
 302                 }
 303
 304                 public static implicit operator JsonValue (Guid value)
 305                 {
 306                         return new JsonPrimitive (value);
 307                 }
 308
 309                 public static implicit operator JsonValue (TimeSpan value)
 310                 {
 311                         return new JsonPrimitive (value);
 312                 }
 313
 314                 public static implicit operator JsonValue (Uri value)
 315                 {
 316                         return new JsonPrimitive (value);
 317                 }
 318
 319                 // JsonValue -> CLI
 320
 321                 public static implicit operator bool (JsonValue value)
 322                 {
 323                         if (value == null)
 324                                 throw new ArgumentNullException ("value");
 325                         return Convert.ToBoolean (((JsonPrimitive) value).Value);
 326                 }
 327
 328                 public static implicit operator byte (JsonValue value)
 329                 {
 330                         if (value == null)
 331                                 throw new ArgumentNullException ("value");
 332                         return Convert.ToByte (((JsonPrimitive) value).Value);
 333                 }
 334
 335                 public static implicit operator char (JsonValue value)
 336                 {
 337                         if (value == null)
 338                                 throw new ArgumentNullException ("value");
 339                         return Convert.ToChar (((JsonPrimitive) value).Value);
 340                 }
 341
 342                 public static implicit operator decimal (JsonValue value)
 343                 {
 344                         if (value == null)
 345                                 throw new ArgumentNullException ("value");
 346                         return Convert.ToDecimal (((JsonPrimitive) value).Value);
 347                 }
 348
 349                 public static implicit operator double (JsonValue value)
 350                 {
 351                         if (value == null)
 352                                 throw new ArgumentNullException ("value");
 353                         return Convert.ToDouble (((JsonPrimitive) value).Value);
 354                 }
 355
 356                 public static implicit operator float (JsonValue value)
 357                 {
 358                         if (value == null)
 359                                 throw new ArgumentNullException ("value");
 360                         return Convert.ToSingle (((JsonPrimitive) value).Value);
 361                 }
 362
 363                 public static implicit operator int (JsonValue value)
 364                 {
 365                         if (value == null)
 366                                 throw new ArgumentNullException ("value");
 367                         return Convert.ToInt32 (((JsonPrimitive) value).Value);
 368                 }
 369
 370                 public static implicit operator long (JsonValue value)
 371                 {
 372                         if (value == null)
 373                                 throw new ArgumentNullException ("value");
 374                         return Convert.ToInt64 (((JsonPrimitive) value).Value);
 375                 }
 376
 377                 public static implicit operator sbyte (JsonValue value)
 378                 {
 379                         if (value == null)
 380                                 throw new ArgumentNullException ("value");
 381                         return Convert.ToSByte (((JsonPrimitive) value).Value);
 382                 }
 383
 384                 public static implicit operator short (JsonValue value)
 385                 {
 386                         if (value == null)
 387                                 throw new ArgumentNullException ("value");
 388                         return Convert.ToInt16 (((JsonPrimitive) value).Value);
 389                 }
 390
 391                 public static implicit operator string (JsonValue value)
 392                 {
 393                         if (value == null)
 394                                 return null;
 395                         return (string) ((JsonPrimitive) value).Value;
 396                 }
 397
 398                 public static implicit operator uint (JsonValue value)
 399                 {
 400                         if (value == null)
 401                                 throw new ArgumentNullException ("value");
 402                         return Convert.ToUInt16 (((JsonPrimitive) value).Value);
 403                 }
 404
 405                 public static implicit operator ulong (JsonValue value)
 406                 {
 407                         if (value == null)
 408                                 throw new ArgumentNullException ("value");
 409                         return Convert.ToUInt64(((JsonPrimitive) value).Value);
 410                 }
 411
 412                 public static implicit operator ushort (JsonValue value)
 413                 {
 414                         if (value == null)
 415                                 throw new ArgumentNullException ("value");
 416                         return Convert.ToUInt16 (((JsonPrimitive) value).Value);
 417                 }
 418
 419                 public static implicit operator DateTime (JsonValue value)
 420                 {
 421                         if (value == null)
 422                                 throw new ArgumentNullException ("value");
 423                         return (DateTime) ((JsonPrimitive) value).Value;
 424                 }
 425
 426                 public static implicit operator DateTimeOffset (JsonValue value)
 427                 {
 428                         if (value == null)
 429                                 throw new ArgumentNullException ("value");
 430                         return (DateTimeOffset) ((JsonPrimitive) value).Value;
 431                 }
 432
 433                 public static implicit operator TimeSpan (JsonValue value)
 434                 {
 435                         if (value == null)
 436                                 throw new ArgumentNullException ("value");
 437                         return (TimeSpan) ((JsonPrimitive) value).Value;
 438                 }
 439
 440                 public static implicit operator Guid (JsonValue value)
 441                 {
 442                         if (value == null)
 443                                 throw new ArgumentNullException ("value");
 444                         return (Guid) ((JsonPrimitive) value).Value;
 445                 }
 446
 447                 public static implicit operator Uri (JsonValue value)
 448                 {
 449                         if (value == null)
 450                                 throw new ArgumentNullException ("value");
 451                         return (Uri) ((JsonPrimitive) value).Value;
 452                 }
 453         }
 454 }