/// <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)
{
if (reader == null) throw new ArgumentNullException("reader");
if (objectType == null) throw new ArgumentNullException("objectType");
if (reader.TokenType == JsonToken.Null)
{
return null;
}
if (reader.TokenType != JsonToken.StartObject)
{
throw new JsonException(string.Format(CultureInfo.InvariantCulture, "DataSet must start with StartObject token not {0}", reader.TokenType));
}
// handle typed datasets
DataSet ds = (objectType == typeof(DataSet))
? new DataSet()
: (DataSet)Activator.CreateInstance(objectType);
ds.Locale = CultureInfo.CurrentCulture;
var converter = new CompactDataTableConverter();
reader.Read();
if (reader.TokenType != JsonToken.PropertyName)
{
throw new JsonException(string.Format(CultureInfo.InvariantCulture, "Expected PropertyName token not {0}", reader.TokenType));
}
while (reader.TokenType == JsonToken.PropertyName)
{
var tableName = (string)reader.Value;
DataTable dt = ds.Tables[tableName];
bool exists = (dt != null);
reader.Read();
dt = (DataTable)converter.ReadJson(reader, typeof(DataTable), dt, serializer);
dt.TableName = tableName;
if (!exists)
ds.Tables.Add(dt);
reader.Read();
}
if (reader.TokenType != JsonToken.EndObject)
{
throw new JsonException(string.Format(CultureInfo.InvariantCulture, "Expected EndObject token not {0}", reader.TokenType));
}
return ds;
}
/// <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)
{
if (writer == null) throw new ArgumentNullException("writer");
if (serializer == null) throw new ArgumentNullException("serializer");
var dataSet = (DataSet)value;
var resolver = serializer.ContractResolver as DefaultContractResolver;
var converter = new CompactDataTableConverter();
writer.WriteStartObject();
foreach (DataTable table in dataSet.Tables)
{
writer.WritePropertyName((resolver != null) ? resolver.GetResolvedPropertyName(table.TableName) : table.TableName);
converter.WriteJson(writer, table, serializer);
}
writer.WriteEndObject();
}
