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[pithos-ms-client] / trunk / Libraries / Json40r2 / Source / Src / Newtonsoft.Json / Converters / DataSetConverter.cs

diff --git a/trunk/Libraries/Json40r2/Source/Src/Newtonsoft.Json/Converters/DataSetConverter.cs b/trunk/Libraries/Json40r2/Source/Src/Newtonsoft.Json/Converters/DataSetConverter.cs
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+#region License
+// Copyright (c) 2007 James Newton-King
+//
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+#endregion
+
+#if !SILVERLIGHT
+using System;
+using System.Data;
+
+namespace Newtonsoft.Json.Converters
+{
+  /// <summary>
+  /// Converts a <see cref="DataSet"/> to and from JSON.
+  /// </summary>
+  public class DataSetConverter : JsonConverter
+  {
+    /// <summary>
+    /// Writes the JSON representation of the object.
+    /// </summary>
+    /// <param name="writer">The <see cref="JsonWriter"/> to write to.</param>
+    /// <param name="value">The value.</param>
+    /// <param name="serializer">The calling serializer.</param>
+    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+    {
+      DataSet dataSet = (DataSet)value;
+
+      DataTableConverter converter = new DataTableConverter();
+
+      writer.WriteStartObject();
+
+      foreach (DataTable table in dataSet.Tables)
+      {
+        writer.WritePropertyName(table.TableName);
+        
+        converter.WriteJson(writer, table, serializer);
+      }
+
+      writer.WriteEndObject();
+    }
+
+    /// <summary>
+    /// Reads the JSON representation of the object.
+    /// </summary>
+    /// <param name="reader">The <see cref="JsonReader"/> to read from.</param>
+    /// <param name="objectType">Type of the object.</param>
+    /// <param name="existingValue">The existing value of object being read.</param>
+    /// <param name="serializer">The calling serializer.</param>
+    /// <returns>The object value.</returns>
+    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+    {
+      DataSet ds = new DataSet();
+
+      DataTableConverter converter = new DataTableConverter();
+
+      reader.Read();
+
+      while (reader.TokenType == JsonToken.PropertyName)
+      {
+        DataTable dt = (DataTable)converter.ReadJson(reader, typeof (DataTable), null, serializer);
+        ds.Tables.Add(dt);
+
+        reader.Read();
+      }
+
+      return ds;
+    }
+
+    /// <summary>
+    /// Determines whether this instance can convert the specified value type.
+    /// </summary>
+    /// <param name="valueType">Type of the value.</param>
+    /// <returns>
+    ///        <c>true</c> if this instance can convert the specified value type; otherwise, <c>false</c>.
+    /// </returns>
+    public override bool CanConvert(Type valueType)
+    {
+      return (valueType == typeof(DataSet));
+    }
+  }
+}
+#endif
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