// Create a new Code type for a particular heading
public static DataTypeCode Create(string name, DataHeading heading, TypeFlags flags, ConvertDelegate converter = null, DefaultDelegate defaulter = null)
{
var dt = new DataTypeCode {
Name = name,
Heading = heading,
Flags = flags,
};
dt.NativeType = TypeMaker.CreateType(dt);
return(dt);
}
// Get type from dictionary, or create and add
public static DataTypeTuple Get(DataHeading heading)
{
if (_headings.ContainsKey(heading))
{
return(_headings[heading]);
}
var dt = DataTypeTuple.Create("tuple", heading, TypeFlags.Variable | TypeFlags.Generated | TypeFlags.HasHeading);
dt.Ordinal = _headings.Count + 1;
dt.NativeType = TypeMaker.CreateType(dt);
_headings[heading] = dt;
return(dt);
}
// Use this type maker to create a structured type, recursively
public static Type CreateType(DataType datatype)
{
// For relation wrap tuple type in a generic List<>
if (datatype is DataTypeRelation)
{
var listtype = typeof(List <>);
return(listtype.MakeGenericType((datatype as DataTypeRelation).ChildTupleType.NativeType));
}
var typemaker = new TypeMaker {
_typebuilder = _modulebuilder.DefineType(datatype.GetNiceName, TypeAttributes.Public),
};
typemaker.DefineMembers(datatype.Heading.Columns);
return(typemaker._typebuilder.CreateType());
}
// Get type from dictionary, or create and add
// Every relation needs a row type, so make sure they use the same heading
public static DataTypeRelation Get(DataHeading heading)
{
if (_headings.ContainsKey(heading))
{
return(_headings[heading]);
}
var tupletype = DataTypeTuple.Get(heading);
var dt = DataTypeRelation.Create("relation", tupletype.Heading, TypeFlags.Variable | TypeFlags.Generated | TypeFlags.HasHeading);
dt.Ordinal = _headings.Count + 1;
dt.ChildTupleType = tupletype;
dt.NativeType = TypeMaker.CreateType(dt);
_headings[heading] = dt;
var x = Activator.CreateInstance(dt.NativeType);
return(dt);
}
// Common code for setting a value
public void Set(TypedValue value)
{
Value = value;
#if false // FIX:code
if (!(value.DataType is DataTypeCode))
{
//if (value.DataType != DataTypes.Code) {
Logger.Assert(value.DataType == DataType);
// TEMP: following code is just so it gets exercised
NativeValue = TypeMaker.ToNativeValue(value);
if (NativeValue != null) // TODO: CodeValue
{
Value = TypeMaker.FromNativeValue(NativeValue, DataType);
}
TypedValueBuilderTest.Test(value);
}
#endif
}
