/// <summary>
/// Reads the JSON representation of the object.
/// </summary>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
{
return(null);
}
MatchTokenOrThrow(reader, JsonToken.StartObject);
ReadOrThrow(reader);
Type valueType = objectType.IsConstructedGenericType ? objectType.GenericTypeArguments[0] : null;
object value = null;
ServiceErrorDto error = null;
while (reader.TokenType == JsonToken.PropertyName)
{
string propertyName = (string)reader.Value;
ReadOrThrow(reader);
if (string.Equals(propertyName, c_valuePropertyName, StringComparison.OrdinalIgnoreCase))
{
if (valueType == null)
{
throw new JsonSerializationException("ServiceResult does not support 'value'; use ServiceResult<T>.");
}
value = serializer.Deserialize(reader, valueType);
}
else if (string.Equals(propertyName, c_errorPropertyName, StringComparison.OrdinalIgnoreCase))
{
error = serializer.Deserialize <ServiceErrorDto>(reader);
}
ReadOrThrow(reader);
}
MatchTokenOrThrow(reader, JsonToken.EndObject);
if (value != null && error != null)
{
throw new JsonSerializationException("ServiceResult must not have both 'value' and 'error'.");
}
if (valueType == null)
{
return(error != null?Failure(error) : Success());
}
else if (error != null)
{
return((ServiceResult)s_genericCastMethod.MakeGenericMethod(valueType).Invoke(Failure(error), new object[0]));
}
else
{
if (value == null && valueType.GetTypeInfo().IsValueType)
{
value = Activator.CreateInstance(valueType);
}
return((ServiceResult)s_genericSuccessMethod.MakeGenericMethod(valueType).Invoke(null, new[] { value }));
}
}
/// <summary>
/// Creates an exception from an error data object.
/// </summary>
public ServiceException(ServiceErrorDto error)
{
if (error == null)
{
throw new ArgumentNullException(nameof(error));
}
m_error = error;
}
/// <summary>
/// Creates a failed result.
/// </summary>
public static ServiceResultFailure Failure(ServiceErrorDto error)
{
if (error == null)
{
throw new ArgumentNullException(nameof(error));
}
return(new ServiceResultFailure(error));
}
/// <summary>
/// Creates an exception from an error data object and an inner exception.
/// </summary>
public ServiceException(ServiceErrorDto error, Exception innerException)
: base(null, innerException)
{
if (error == null)
{
throw new ArgumentNullException(nameof(error));
}
m_error = error;
}
private static string GetErrorString(ServiceErrorDto error, string indent = "")
{
string text = error.Message ?? "";
if (error.Code != null)
{
text += " (" + error.Code + ")";
}
if (error.Details != null)
{
text += Environment.NewLine + indent + " Details: " + error.Details;
}
if (error.InnerError != null)
{
text += Environment.NewLine + indent + " InnerError: " + GetErrorString(error.InnerError, indent + " ");
}
return(text);
}
/// <summary>
/// Creates an exception from an error data object.
/// </summary>
public ServiceException(ServiceErrorDto error)
{
m_error = error ?? throw new ArgumentNullException(nameof(error));
}
internal ServiceResultFailure(ServiceErrorDto error)
: base(error)
{
}
internal ServiceResult(ServiceErrorDto error)
{
m_error = error;
}
/// <summary> /// Creates a failed result. /// </summary> public static ServiceResultFailure Failure(ServiceErrorDto error) => new ServiceResultFailure(error ?? throw new ArgumentNullException(nameof(error)));
/// <summary>
/// Creates an exception from an error data object and an inner exception.
/// </summary>
public ServiceException(ServiceErrorDto error, Exception?innerException)
: base(null, innerException)
{
Error = error ?? throw new ArgumentNullException(nameof(error));
}