public static SqlType Deserialize(BinaryReader reader, ISqlTypeResolver typeResolver)
{
var typeCode = (SqlTypeCode)reader.ReadByte();
if (SqlBooleanType.IsBooleanType(typeCode))
{
return(PrimitiveTypes.Boolean(typeCode));
}
if (SqlDateTimeType.IsDateType(typeCode))
{
return(PrimitiveTypes.DateTime(typeCode));
}
if (typeCode == SqlTypeCode.DayToSecond)
{
return(PrimitiveTypes.DayToSecond());
}
if (typeCode == SqlTypeCode.YearToMonth)
{
return(PrimitiveTypes.YearToMonth());
}
if (SqlCharacterType.IsStringType(typeCode))
{
var maxSize = reader.ReadInt32();
CultureInfo locale = null;
var hasLocale = reader.ReadByte() == 1;
if (hasLocale)
{
var name = reader.ReadString();
locale = new CultureInfo(name);
}
return(PrimitiveTypes.String(typeCode, maxSize, locale));
}
if (SqlNumericType.IsNumericType(typeCode))
{
var size = reader.ReadInt32();
var scale = reader.ReadInt32();
return(PrimitiveTypes.Numeric(typeCode, size, scale));
}
if (SqlBinaryType.IsBinaryType(typeCode))
{
var size = reader.ReadInt32();
return(PrimitiveTypes.Binary(typeCode, size));
}
if (typeCode == SqlTypeCode.Type)
{
if (typeResolver == null)
{
throw new NotSupportedException("User-Defined types require a resolver context.");
}
// TODO: support type arguments
var typeName = reader.ReadString();
return(typeResolver.Resolve(new SqlTypeResolveInfo(typeName)));
}
/*
* TODO:
* if (typeCode == SqlTypeCode.QueryPlan)
* return new SqlQueryType();
*/
if (typeCode == SqlTypeCode.Array)
{
var size = reader.ReadInt32();
return(new SqlArrayType(size));
}
throw new NotSupportedException($"The type code '{typeCode}' does not support deserialization");
}
private static SqlType GetSqlType(ISqlValue value)
{
if (value == null ||
SqlNull.Value == value)
{
throw new ArgumentException();
}
if (value is SqlNumber)
{
var number = (SqlNumber)value;
if (number.CanBeInt32)
{
return(PrimitiveTypes.Integer());
}
if (number.CanBeInt64)
{
return(PrimitiveTypes.BigInt());
}
if (number.Precision == SqlNumericType.FloatPrecision)
{
return(new SqlNumericType(SqlTypeCode.Float, number.Precision, number.Scale));
}
if (number.Precision == SqlNumericType.DoublePrecision)
{
return(new SqlNumericType(SqlTypeCode.Double, number.Precision, number.Scale));
}
if (number.Precision == SqlNumericType.DecimalPrecision)
{
return(new SqlNumericType(SqlTypeCode.Decimal, number.Precision, number.Scale));
}
return(PrimitiveTypes.Numeric(number.Precision, number.Scale));
}
if (value is ISqlString)
{
// TODO: support the long string
var length = ((ISqlString)value).Length;
return(PrimitiveTypes.VarChar((int)length));
}
if (value is SqlBinary)
{
var bin = (SqlBinary)value;
return(PrimitiveTypes.VarBinary((int)bin.Length));
}
if (value is SqlDateTime)
{
return(PrimitiveTypes.TimeStamp());
}
if (value is SqlBoolean)
{
return(PrimitiveTypes.Boolean());
}
if (value is SqlYearToMonth)
{
return(PrimitiveTypes.YearToMonth());
}
if (value is SqlDayToSecond)
{
return(PrimitiveTypes.DayToSecond());
}
if (value is SqlArray)
{
return(PrimitiveTypes.Array(((SqlArray)value).Length));
}
throw new NotSupportedException();
}