/// <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.TokenType == JsonToken.Null)
{
return(null);
}
var index = new StreamingStartIndex();
while (reader.Read() && reader.TokenType == JsonToken.PropertyName)
{
var propertyName = reader.Value.ToString();
reader.Read();
if (!ItemPropertyName.Equals(propertyName))
{
continue;
}
var value = serializer.Deserialize(reader);
long longValue;
// Handle case where avro-json format is not used
if (value is int || value is long)
{
index.Item = value;
}
// Handle number sent as string
else if (value is string && long.TryParse(value.ToString(), out longValue))
{
index.Item = longValue;
}
else if (value is JObject)
{
var jObject = value as JObject;
var intProperty = jObject.Property(IntDataType);
var longProperty = jObject.Property(LongDataType);
if (intProperty != null)
{
index.Item = intProperty.Value.Value <int>();
}
else if (longProperty != null)
{
index.Item = longProperty.Value.Value <long>();
}
else
{
throw new JsonSerializationException($"Unsupported data type: {value}");
}
}
else if (value != null)
{
throw new JsonSerializationException($"Unsupported data type: {value}");
}
}
return(index);
}
public void StreamingStartIndexConverter_WriteJson_serializes_null_value()
{
var index = new StreamingStartIndex
{
Item = null
};
const string expected = "{\"item\":null}";
var json = EtpExtensions.Serialize(index);
Assert.AreEqual(expected, json);
}
public void StreamingStartIndexConverter_WriteJson_serializes_long_value()
{
var index = new StreamingStartIndex
{
Item = 10L
};
var expected = "{\"item\":{\"long\":10}}";
var json = EtpExtensions.Serialize(index);
Assert.AreEqual(expected, json);
}
public void StreamingStartIndexConverter_WriteJson_raises_error_for_unsupported_data_type()
{
var index = new StreamingStartIndex
{
Item = "abc"
};
var pass = false;
try
{
EtpExtensions.Serialize(index);
}
catch (JsonSerializationException)
{
pass = true;
}
Assert.IsTrue(pass);
}
