private static bool TryDeserializeScalar(IIonReader reader, Type type, IScalarConverter scalarConverter, ref object result)
{
if (type == typeof(string))
{
if (reader.CurrentType != IonType.String && reader.CurrentType != IonType.Null)
{
return(false);
}
result = reader.CurrentIsNull ? null : reader.StringValue();
return(true);
}
if (reader.CurrentIsNull)
{
if (type.IsValueType)
{
return(false);
}
result = null;
return(true);
}
//check for enum/symbol
if (type.IsEnum)
{
if (reader.CurrentType != IonType.Symbol)
{
goto NoMatch;
}
var symbolText = reader.SymbolValue().Text;
return(Enum.TryParse(type, symbolText, out result));
}
if (type == typeof(bool))
{
if (reader.CurrentType != IonType.Bool)
{
goto NoMatch;
}
result = reader.BoolValue();
return(true);
}
if (type == typeof(int))
{
if (reader.CurrentType != IonType.Int)
{
goto NoMatch;
}
switch (reader.GetIntegerSize())
{
case IntegerSize.Int:
result = reader.IntValue();
return(true);
case IntegerSize.Long:
case IntegerSize.BigInteger:
throw new OverflowException($"Encoded value is too big for int32");
default:
throw new ArgumentOutOfRangeException();
}
}
if (type == typeof(long))
{
if (reader.CurrentType != IonType.Int)
{
goto NoMatch;
}
switch (reader.GetIntegerSize())
{
case IntegerSize.Int:
result = (long)reader.IntValue();
return(true);
case IntegerSize.Long:
result = reader.LongValue();
return(true);
case IntegerSize.BigInteger:
throw new OverflowException($"Encoded value is too big for int32");
default:
throw new ArgumentOutOfRangeException();
}
}
if (type == typeof(BigInteger))
{
if (reader.CurrentType != IonType.Int)
{
goto NoMatch;
}
switch (reader.GetIntegerSize())
{
case IntegerSize.Int:
result = new BigInteger(reader.IntValue());
return(true);
case IntegerSize.Long:
result = new BigInteger(reader.LongValue());
return(true);
case IntegerSize.BigInteger:
result = reader.BigIntegerValue();
return(true);
default:
throw new ArgumentOutOfRangeException();
}
}
if (type == typeof(float))
{
if (reader.CurrentType != IonType.Float)
{
goto NoMatch;
}
result = (float)reader.DoubleValue();
return(true);
}
if (type == typeof(double))
{
if (reader.CurrentType != IonType.Float)
{
goto NoMatch;
}
result = reader.DoubleValue();
return(true);
}
if (type == typeof(decimal))
{
if (reader.CurrentType != IonType.Decimal)
{
goto NoMatch;
}
result = reader.DecimalValue();
return(true);
}
if (type == typeof(DateTime))
{
if (reader.CurrentType != IonType.Timestamp)
{
goto NoMatch;
}
result = reader.TimestampValue().DateTime;
return(true);
}
if (type == typeof(DateTimeOffset))
{
if (reader.CurrentType != IonType.Timestamp)
{
goto NoMatch;
}
result = reader.TimestampValue().AsDateTimeOffset();
return(true);
}
NoMatch:
//here means we don't know , try the scalar converter
return(scalarConverter != null && reader.TryConvertTo(type, scalarConverter, out result));
}