public static JsonSerializerSettings NormalizeDecimals(this JsonSerializerSettings settings)
{
if (settings == null)
{
throw new ArgumentNullException(nameof(settings));
}
Contract.EndContractBlock();
JsonConverter?existing = settings.Converters.FirstOrDefault(c => c is JsonConverter <decimal>);
var existingNullable = settings.Converters.FirstOrDefault(c => c is JsonConverter <decimal?>);
if (existing is JsonDecimalConverter && existingNullable is JsonNullableDecimalConverter)
{
return(settings);
}
if (existing == null && existingNullable == null)
{
return(settings
.AddConverter(JsonDecimalConverter.Instance)
.AddConverter(JsonNullableDecimalConverter.Instance));
}
if (existing != null)
{
throw new InvalidOperationException("A specific decimal converter already exists.");
}
throw new InvalidOperationException("A specific Nullable<decimal> converter already exists.");
}
static JsonSerializerSettings RoundDoublesCore(this JsonSerializerSettings settings, int maxDecimals)
{
var existing = settings.Converters.FirstOrDefault(c => c is JsonConverter <double>);
if (existing == null)
{
return(settings.AddConverter(new JsonDoubleRoundingConverter(maxDecimals)));
}
if (existing is JsonDoubleRoundingConverter e && e.Maximum == maxDecimals)
{
return(settings);
}
throw new InvalidOperationException("A specific double converter already exists.");
}
static JsonSerializerSettings RoundNullableDecimalsCore(this JsonSerializerSettings settings, int maxDecimals)
{
JsonConverter?existing = settings.Converters.FirstOrDefault(c => c is JsonConverter <decimal?>);
if (existing is JsonNullableDecimalConverter && existing.GetType() == typeof(JsonNullableDecimalConverter))
{
settings.Converters.Remove(existing);
existing = null;
}
if (existing == null)
{
return(settings.AddConverter(new JsonNullableDecimalRoundingConverter(maxDecimals)));
}
if (existing is JsonNullableDecimalRoundingConverter e && e.Maximum == maxDecimals)
{
return(settings);
}
throw new InvalidOperationException("A specific Nullable<decimal> converter already exists.");
}
