Tizen.Network.IoTConnectivity/Tizen.Network.IoTConnectivity/State.cs

   1 /// Copyright 2016 by Samsung Electronics, Inc.,
   2 ///
   3 /// This software is the confidential and proprietary information
   4 /// of Samsung Electronics, Inc. ("Confidential Information"). You
   5 /// shall not disclose such Confidential Information and shall use
   6 /// it only in accordance with the terms of the license agreement
   7 /// you entered into with Samsung.
   8
   9 using System;
  10 using System.Collections;
  11 using System.Collections.Generic;
  12 using System.Runtime.InteropServices;
  13
  14 namespace Tizen.Network.IoTConnectivity
  15 {
  16     /// <summary>
  17     /// State represents current state of a resource
  18     /// </summary>
  19     public class State : IDictionary<string, object>, IDisposable
  20     {
  21         internal IntPtr _resourceStateHandle = IntPtr.Zero;
  22         private readonly IDictionary<string, object> _state = new Dictionary<string, object>();
  23         private bool _disposed = false;
  24
  25         /// <summary>
  26         /// Constructor
  27         /// </summary>
  28         public State()
  29         {
  30             int ret = Interop.IoTConnectivity.Common.State.Create(out _resourceStateHandle);
  31             if (ret != (int)IoTConnectivityError.None)
  32             {
  33                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to create state handle");
  34                 throw IoTConnectivityErrorFactory.GetException(ret);
  35             }
  36         }
  37
  38         internal State(IntPtr stateHandleToClone)
  39         {
  40             int ret = Interop.IoTConnectivity.Common.State.Clone(stateHandleToClone, out _resourceStateHandle);
  41             if (ret != (int)IoTConnectivityError.None)
  42             {
  43                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to create state handle");
  44                 throw IoTConnectivityErrorFactory.GetException(ret);
  45             }
  46
  47             SetState(stateHandleToClone);
  48         }
  49
  50         ~State()
  51         {
  52             Dispose(false);
  53         }
  54
  55         /// <summary>
  56         /// Gets the number of status elements
  57         /// </summary>
  58         public int Count
  59         {
  60             get
  61             {
  62                 return _state.Count;
  63             }
  64         }
  65
  66         /// <summary>
  67         /// Represents whether State is readonly
  68         /// </summary>
  69         public bool IsReadOnly
  70         {
  71             get
  72             {
  73                 return _state.IsReadOnly;
  74             }
  75         }
  76
  77         /// <summary>
  78         /// Contains all the status keys
  79         /// </summary>
  80         public ICollection<string> Keys
  81         {
  82             get
  83             {
  84                 return _state.Keys;
  85             }
  86         }
  87
  88         /// <summary>
  89         /// Contains all the status values
  90         /// </summary>
  91         public ICollection<object> Values
  92         {
  93             get
  94             {
  95                 return _state.Values;
  96             }
  97         }
  98
  99         /// <summary>
 100         /// Gets or sets the status with the specified key.
 101         /// </summary>
 102         /// <param name="key">The key of the status to get or set.</param>
 103         /// <returns>The element with the specified key.</returns>
 104         public object this[string key]
 105         {
 106             get
 107             {
 108                 return _state[key];
 109             }
 110
 111             set
 112             {
 113                 Add(key, value);
 114             }
 115         }
 116
 117         /// <summary>
 118         /// Adds status key and value as a key value pair
 119         /// </summary>
 120         /// <param name="item">The item to add</param>
 121         public void Add(KeyValuePair<string, object> item)
 122         {
 123             Add(item.Key, item.Value);
 124         }
 125
 126         /// <summary>
 127         /// Adds status element
 128         /// </summary>
 129         /// <param name="key">The key representing the state</param>
 130         /// <param name="value">The value representing the state</param>
 131         public void Add(string key, object value)
 132         {
 133             int ret = 0;
 134             if (value is int)
 135             {
 136                 ret = Interop.IoTConnectivity.Common.State.AddInt(_resourceStateHandle, key, (int)value);
 137                 if (ret != (int)IoTConnectivityError.None)
 138                 {
 139                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add int");
 140                     throw IoTConnectivityErrorFactory.GetException(ret);
 141                 }
 142             }
 143             else if (value is State)
 144             {
 145                 State state = (State)value;
 146                 ret = Interop.IoTConnectivity.Common.State.AddState(_resourceStateHandle, key, state._resourceStateHandle);
 147                 if (ret != (int)IoTConnectivityError.None)
 148                 {
 149                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add state");
 150                     throw IoTConnectivityErrorFactory.GetException(ret);
 151                 }
 152             }
 153             else if (value is string)
 154             {
 155                 ret = Interop.IoTConnectivity.Common.State.AddStr(_resourceStateHandle, key, (string)value);
 156                 if (ret != (int)IoTConnectivityError.None)
 157                 {
 158                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add string");
 159                     throw IoTConnectivityErrorFactory.GetException(ret);
 160                 }
 161             }
 162             else if (value is double)
 163             {
 164                 ret = Interop.IoTConnectivity.Common.State.AddDouble(_resourceStateHandle, key, (double)value);
 165                 if (ret != (int)IoTConnectivityError.None)
 166                 {
 167                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add double");
 168                     throw IoTConnectivityErrorFactory.GetException(ret);
 169                 }
 170             }
 171             else if (value is bool)
 172             {
 173                 ret = Interop.IoTConnectivity.Common.State.AddBool(_resourceStateHandle, key, (bool)value);
 174                 if (ret != (int)IoTConnectivityError.None)
 175                 {
 176                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add bool");
 177                     throw IoTConnectivityErrorFactory.GetException(ret);
 178                 }
 179             }
 180             else if (value is byte[])
 181             {
 182                 byte[] val = value as byte[];
 183                 if (val == null)
 184                 {
 185                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get byte[] val");
 186                     throw new ArgumentException("Invalid Parameter");
 187                 }
 188                 ret = Interop.IoTConnectivity.Common.State.AddByteStr(_resourceStateHandle, key, val, val.Length);
 189                 if (ret != (int)IoTConnectivityError.None)
 190                 {
 191                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add bool");
 192                     throw IoTConnectivityErrorFactory.GetException(ret);
 193                 }
 194             }
 195             else if (value is IEnumerable)
 196             {
 197                 IntPtr listHandle = List.GetListHandle(value);
 198                 ret = Interop.IoTConnectivity.Common.State.AddList(_resourceStateHandle, key, listHandle);
 199                 Interop.IoTConnectivity.Common.State.Destroy(listHandle);
 200                 if (ret != (int)IoTConnectivityError.None)
 201                 {
 202                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add state");
 203                     throw IoTConnectivityErrorFactory.GetException(ret);
 204                 }
 205             }
 206             else
 207             {
 208                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to Add");
 209                 throw IoTConnectivityErrorFactory.GetException((int)IoTConnectivityError.InvalidParameter);
 210             }
 211             _state.Add(key, value);
 212         }
 213
 214         /// <summary>
 215         /// Clears state collection
 216         /// </summary>
 217         public void Clear()
 218         {
 219             foreach (string key in _state.Keys)
 220             {
 221                 int ret = Interop.IoTConnectivity.Common.State.Remove(_resourceStateHandle, key);
 222                 if (ret != (int)IoTConnectivityError.None)
 223                 {
 224                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to clear state");
 225                     throw IoTConnectivityErrorFactory.GetException(ret);
 226                 }
 227             }
 228             _state.Clear();
 229         }
 230
 231         /// <summary>
 232         /// Checks the given key value pair exists in state collection
 233         /// </summary>
 234         /// <param name="item">The status key value pair</param>
 235         /// <returns>true if exists. Otherwise, false</returns>
 236         public bool Contains(KeyValuePair<string, object> item)
 237         {
 238             return _state.Contains(item);
 239         }
 240
 241         /// <summary>
 242         /// Checks the given key exists in state collection
 243         /// </summary>
 244         /// <param name="key">The status key</param>
 245         /// <returns>true if exists. Otherwise, false</returns>
 246         public bool ContainsKey(string key)
 247         {
 248             return _state.ContainsKey(key);
 249         }
 250
 251         /// <summary>
 252         /// Copies the elements of the state to an Array, starting at a particular index.
 253         /// </summary>
 254         /// <param name="array">The destination array</param>
 255         /// <param name="arrayIndex">The zero-based index in array at which copying begins.</param>
 256         public void CopyTo(KeyValuePair<string, object>[] array, int arrayIndex)
 257         {
 258             _state.CopyTo(array, arrayIndex);
 259         }
 260
 261         /// <summary>
 262         ///   Returns an enumerator that iterates through the collection.
 263         /// </summary>
 264         /// <returns> An enumerator that can be used to iterate through the collection.</returns>
 265         public IEnumerator<KeyValuePair<string, object>> GetEnumerator()
 266         {
 267             return _state.GetEnumerator();
 268         }
 269
 270         /// <summary>
 271         /// Removes a state element from collection
 272         /// </summary>
 273         /// <param name="item">The state element to remove</param>
 274         /// <returns>true if operation is success. Otherwise, false</returns>
 275         public bool Remove(KeyValuePair<string, object> item)
 276         {
 277             int ret = Interop.IoTConnectivity.Common.State.Remove(_resourceStateHandle, item.Key);
 278             if (ret != (int)IoTConnectivityError.None)
 279             {
 280                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to remove state");
 281                 throw IoTConnectivityErrorFactory.GetException(ret);
 282             }
 283
 284             return _state.Remove(item);
 285         }
 286
 287         /// <summary>
 288         ///  Removes a state element from collection using key
 289         /// </summary>
 290         /// <param name="key">The state element to remove</param>
 291         /// <returns>true if operation is success. Otherwise, false</returns>
 292         public bool Remove(string key)
 293         {
 294             int ret = Interop.IoTConnectivity.Common.State.Remove(_resourceStateHandle, key);
 295             if (ret != (int)IoTConnectivityError.None)
 296             {
 297                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to remove state");
 298                 throw IoTConnectivityErrorFactory.GetException(ret);
 299             }
 300
 301             return _state.Remove(key);
 302         }
 303
 304         /// <summary>
 305         /// Gets the value associated with the specified key.
 306         /// </summary>
 307         /// <param name="key">The key whose value to get.</param>
 308         /// <param name="value"> The value associated with the specified key</param>
 309         /// <returns> true if the state collection contains an element with the specified key; otherwise, false.</returns>
 310         public bool TryGetValue(string key, out object value)
 311         {
 312             return _state.TryGetValue(key, out value);
 313         }
 314
 315         IEnumerator IEnumerable.GetEnumerator()
 316         {
 317             return _state.GetEnumerator();
 318         }
 319
 320         public void Dispose()
 321         {
 322             Dispose(true);
 323             GC.SuppressFinalize(this);
 324         }
 325
 326         protected virtual void Dispose(bool disposing)
 327         {
 328             if (_disposed)
 329                 return;
 330
 331             if (disposing)
 332             {
 333                 // Free managed objects
 334             }
 335
 336             Interop.IoTConnectivity.Common.State.Destroy(_resourceStateHandle);
 337             _disposed = true;
 338         }
 339
 340         private void SetState(IntPtr stateHandle)
 341         {
 342             Interop.IoTConnectivity.Common.State.StateCallback cb = (IntPtr state, string key, IntPtr userData) =>
 343             {
 344                 Interop.IoTConnectivity.Common.DataType type = 0;
 345                 int ret = Interop.IoTConnectivity.Common.State.GetType(state, key, out type);
 346                 if (ret != (int)IoTConnectivityError.None)
 347                 {
 348                     Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get type");
 349                     throw IoTConnectivityErrorFactory.GetException(ret);
 350                 }
 351                 switch (type)
 352                 {
 353                     case Interop.IoTConnectivity.Common.DataType.Int:
 354                         {
 355                             int value;
 356                             ret = Interop.IoTConnectivity.Common.State.GetInt(state, key, out value);
 357                             if (ret != (int)IoTConnectivityError.None)
 358                             {
 359                                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get state");
 360                                 throw IoTConnectivityErrorFactory.GetException(ret);
 361                             }
 362                             Add(key, value);
 363                             break;
 364                         }
 365                     case Interop.IoTConnectivity.Common.DataType.Bool:
 366                         {
 367                             bool value;
 368                             ret = Interop.IoTConnectivity.Common.State.GetBool(state, key, out value);
 369                             if (ret != (int)IoTConnectivityError.None)
 370                             {
 371                                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get state");
 372                                 throw IoTConnectivityErrorFactory.GetException(ret);
 373                             }
 374                             Add(key, value);
 375                             break;
 376                         }
 377                     case Interop.IoTConnectivity.Common.DataType.Double:
 378                         {
 379                             double value;
 380                             ret = Interop.IoTConnectivity.Common.State.GetDouble(state, key, out value);
 381                             if (ret != (int)IoTConnectivityError.None)
 382                             {
 383                                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get state");
 384                                 throw IoTConnectivityErrorFactory.GetException(ret);
 385                             }
 386                             Add(key, value);
 387                             break;
 388                         }
 389                     case Interop.IoTConnectivity.Common.DataType.String:
 390                         {
 391                             string value;
 392                             ret = Interop.IoTConnectivity.Common.State.GetStr(state, key, out value);
 393                             if (ret != (int)IoTConnectivityError.None)
 394                             {
 395                                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get state");
 396                                 throw IoTConnectivityErrorFactory.GetException(ret);
 397                             }
 398                             Add(key, value);
 399                             break;
 400                         }
 401                     case Interop.IoTConnectivity.Common.DataType.ByteStr:
 402                         {
 403                             IntPtr byteStrPtr;
 404                             int byteStrSize;
 405                             ret = Interop.IoTConnectivity.Common.State.GetByteStr(state, key, out byteStrPtr, out byteStrSize);
 406                             if (ret != (int)IoTConnectivityError.None)
 407                             {
 408                                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get state");
 409                                 throw IoTConnectivityErrorFactory.GetException(ret);
 410                             }
 411                             byte[] byteStr = new byte[byteStrSize];
 412                             Marshal.Copy(byteStrPtr, byteStr, 0, byteStrSize);
 413                             Add(key, byteStr);
 414                             break;
 415                         }
 416                     case Interop.IoTConnectivity.Common.DataType.Null:
 417                         {
 418                             Add(key, null);
 419                             break;
 420                         }
 421                     case Interop.IoTConnectivity.Common.DataType.List:
 422                         {
 423                             IntPtr listHandle;
 424                             ret = Interop.IoTConnectivity.Common.State.GetList(state, key, out listHandle);
 425                             if (ret != (int)IoTConnectivityError.None)
 426                             {
 427                                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get state");
 428                                 throw IoTConnectivityErrorFactory.GetException(ret);
 429                             }
 430                             Add(key, List.GetList(listHandle));
 431                             break;
 432                         }
 433                     case Interop.IoTConnectivity.Common.DataType.State:
 434                         {
 435                             IntPtr stateHndle;
 436                             ret = Interop.IoTConnectivity.Common.State.GetState(state, key, out stateHndle);
 437                             if (ret != (int)IoTConnectivityError.None)
 438                             {
 439                                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get state");
 440                                 throw IoTConnectivityErrorFactory.GetException(ret);
 441                             }
 442                             Add(key, new State(stateHndle));
 443                             break;
 444                         }
 445                     default:
 446                         break;
 447                 }
 448
 449                 return true;
 450             };
 451
 452             int res = Interop.IoTConnectivity.Common.State.Foreach(stateHandle, cb, IntPtr.Zero);
 453             if (res != (int)IoTConnectivityError.None)
 454             {
 455                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to remove state");
 456                 throw IoTConnectivityErrorFactory.GetException(res);
 457             }
 458         }
 459     }
 460
 461     internal static class List
 462     {
 463         internal static IntPtr GetListHandle(object list)
 464         {
 465             IntPtr listHandle = IntPtr.Zero;
 466             int ret;
 467             int pos = 0;
 468
 469             if (list is IEnumerable<IEnumerable>)
 470             {
 471                 ret = Interop.IoTConnectivity.Common.List.Create(Interop.IoTConnectivity.Common.DataType.List, out listHandle);
 472                 pos = 0;
 473                 foreach (IEnumerable val in (IEnumerable<IEnumerable>)list)
 474                 {
 475                     IntPtr childList = GetListHandle(val);
 476                     ret = Interop.IoTConnectivity.Common.List.AddList(listHandle, childList, pos++);
 477                     if (ret != (int)IoTConnectivityError.None)
 478                     {
 479                         Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add state");
 480                         Interop.IoTConnectivity.Common.List.Destroy(childList);
 481                         throw IoTConnectivityErrorFactory.GetException(ret);
 482                     }
 483                 }
 484             }
 485             else if (list is IEnumerable<int>)
 486             {
 487                 ret = Interop.IoTConnectivity.Common.List.Create(Interop.IoTConnectivity.Common.DataType.Int, out listHandle);
 488                 pos = 0;
 489                 foreach (int val in (IEnumerable<int>)list)
 490                 {
 491                     ret = Interop.IoTConnectivity.Common.List.AddInt(listHandle, val, pos++);
 492                     if (ret != (int)IoTConnectivityError.None)
 493                     {
 494                         Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add state");
 495                         throw IoTConnectivityErrorFactory.GetException(ret);
 496                     }
 497                 }
 498             }
 499             else if (list is IEnumerable<string>)
 500             {
 501                 ret = Interop.IoTConnectivity.Common.List.Create(Interop.IoTConnectivity.Common.DataType.String, out listHandle);
 502                 pos = 0;
 503                 foreach (string val in (IEnumerable<string>)list)
 504                 {
 505                     ret = Interop.IoTConnectivity.Common.List.AddStr(listHandle, val, pos++);
 506                     if (ret != (int)IoTConnectivityError.None)
 507                     {
 508                         Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add state");
 509                         throw IoTConnectivityErrorFactory.GetException(ret);
 510                     }
 511                 }
 512             }
 513             else if (list is IEnumerable<double>)
 514             {
 515                 ret = Interop.IoTConnectivity.Common.List.Create(Interop.IoTConnectivity.Common.DataType.Double, out listHandle);
 516                 pos = 0;
 517                 foreach (double val in (IEnumerable<double>)list)
 518                 {
 519                     ret = Interop.IoTConnectivity.Common.List.AddDouble(listHandle, val, pos++);
 520                     if (ret != (int)IoTConnectivityError.None)
 521                     {
 522                         Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add state");
 523                         throw IoTConnectivityErrorFactory.GetException(ret);
 524                     }
 525                 }
 526             }
 527             else if (list is IEnumerable<bool>)
 528             {
 529                 ret = Interop.IoTConnectivity.Common.List.Create(Interop.IoTConnectivity.Common.DataType.Bool, out listHandle);
 530                 pos = 0;
 531                 foreach (bool val in (IEnumerable<bool>)list)
 532                 {
 533                     ret = Interop.IoTConnectivity.Common.List.AddBool(listHandle, val, pos++);
 534                     if (ret != (int)IoTConnectivityError.None)
 535                     {
 536                         Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add state");
 537                         throw IoTConnectivityErrorFactory.GetException(ret);
 538                     }
 539                 }
 540             }
 541             else if (list is IEnumerable<State>)
 542             {
 543                 ret = Interop.IoTConnectivity.Common.List.Create(Interop.IoTConnectivity.Common.DataType.State, out listHandle);
 544                 pos = 0;
 545                 foreach (State val in (IEnumerable<State>)list)
 546                 {
 547                     ret = Interop.IoTConnectivity.Common.List.AddState(listHandle, val._resourceStateHandle, pos++);
 548                     if (ret != (int)IoTConnectivityError.None)
 549                     {
 550                         Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add state");
 551                         throw IoTConnectivityErrorFactory.GetException(ret);
 552                     }
 553                 }
 554             }
 555             else if (list is IEnumerable<byte[]>)
 556             {
 557                 ret = Interop.IoTConnectivity.Common.List.Create(Interop.IoTConnectivity.Common.DataType.ByteStr, out listHandle);
 558                 pos = 0;
 559                 foreach (byte[] val in (IEnumerable<byte[]>)list)
 560                 {
 561                     ret = Interop.IoTConnectivity.Common.List.AddByteStr(listHandle, val, val.Length, pos++);
 562                     if (ret != (int)IoTConnectivityError.None)
 563                     {
 564                         Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to add byte[]");
 565                         throw IoTConnectivityErrorFactory.GetException(ret);
 566                     }
 567                 }
 568             }
 569             else
 570             {
 571                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to GetListHandle");
 572                 throw IoTConnectivityErrorFactory.GetException((int)IoTConnectivityError.InvalidParameter);
 573             }
 574             return listHandle;
 575         }
 576
 577         internal static object GetList(IntPtr listHandle)
 578         {
 579             IList list = null;
 580             int type;
 581             int ret = Interop.IoTConnectivity.Common.List.GetType(listHandle, out type);
 582             if (ret != (int)IoTConnectivityError.None)
 583             {
 584                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get type");
 585                 throw IoTConnectivityErrorFactory.GetException(ret);
 586             }
 587             switch ((Interop.IoTConnectivity.Common.DataType)type)
 588             {
 589                 case Interop.IoTConnectivity.Common.DataType.Int:
 590                     {
 591                         list = new List<int>();
 592                         Interop.IoTConnectivity.Common.List.IntCallback cb = (int pos, int value, IntPtr userData) =>
 593                         {
 594                             list.Add(value);
 595                             return true;
 596                         };
 597                         ret = Interop.IoTConnectivity.Common.List.ForeachInt(listHandle, cb, IntPtr.Zero);
 598                         break;
 599                     }
 600                 case Interop.IoTConnectivity.Common.DataType.Bool:
 601                     {
 602                         list = new List<bool>();
 603                         Interop.IoTConnectivity.Common.List.BoolCallback cb = (int pos, bool value, IntPtr userData) =>
 604                         {
 605                             list.Add(value);
 606                             return true;
 607                         };
 608                         ret = Interop.IoTConnectivity.Common.List.ForeachBool(listHandle, cb, IntPtr.Zero);
 609                         break;
 610                     }
 611                 case Interop.IoTConnectivity.Common.DataType.Double:
 612                     {
 613                         list = new List<double>();
 614                         Interop.IoTConnectivity.Common.List.DoubleCallback cb = (int pos, double value, IntPtr userData) =>
 615                         {
 616                             list.Add(value);
 617                             return true;
 618                         };
 619                         ret = Interop.IoTConnectivity.Common.List.ForeachDouble(listHandle, cb, IntPtr.Zero);
 620                         break;
 621                     }
 622                 case Interop.IoTConnectivity.Common.DataType.String:
 623                     {
 624                         list = new List<string>();
 625                         Interop.IoTConnectivity.Common.List.StrCallback cb = (int pos, string value, IntPtr userData) =>
 626                         {
 627                             list.Add(value);
 628                             return true;
 629                         };
 630                         ret = Interop.IoTConnectivity.Common.List.ForeachStr(listHandle, cb, IntPtr.Zero);
 631                         break;
 632                     }
 633                 case Interop.IoTConnectivity.Common.DataType.State:
 634                     {
 635                         list = new List<State>();
 636                         Interop.IoTConnectivity.Common.List.StateCallback cb = (int pos, IntPtr value, IntPtr userData) =>
 637                         {
 638                             list.Add(new State(value));
 639                             return true;
 640                         };
 641                         ret = Interop.IoTConnectivity.Common.List.ForeachState(listHandle, cb, IntPtr.Zero);
 642                         break;
 643                     }
 644                 case Interop.IoTConnectivity.Common.DataType.ByteStr:
 645                     {
 646                         list = new List<byte[]>();
 647                         Interop.IoTConnectivity.Common.List.ByteStrCallback cb = (int pos, byte[] value, int len, IntPtr userData) =>
 648                         {
 649                             list.Add(value);
 650                             return true;
 651                         };
 652                         ret = Interop.IoTConnectivity.Common.List.ForeachByteStr(listHandle, cb, IntPtr.Zero);
 653                         break;
 654                     }
 655                 case Interop.IoTConnectivity.Common.DataType.List:
 656                     {
 657                         list = new List<List<object>>();
 658                         Interop.IoTConnectivity.Common.List.ListCallback cb = (int pos, IntPtr value, IntPtr userData) =>
 659                         {
 660                             object childList = GetList(value);
 661                             list.Add(childList);
 662                             return true;
 663                         };
 664                         ret = Interop.IoTConnectivity.Common.List.ForeachList(listHandle, cb, IntPtr.Zero);
 665                         break;
 666                     }
 667                 default:
 668                     break;
 669             }
 670             if (ret != (int)IoTConnectivityError.None)
 671             {
 672                 Log.Error(IoTConnectivityErrorFactory.LogTag, "Failed to get state");
 673                 throw IoTConnectivityErrorFactory.GetException(ret);
 674             }
 675             return list;
 676         }
 677     }
 678 }