/// <summary>
/// Add MarshalAs attribute
/// </summary>
/// <param name="xmlField"></param>
/// <param name="fieldBuilder"></param>
private void CreateRTMarshalAsAttribute(XmlStructFieldLayout xmlField, FieldBuilder fieldBuilder)
{
// Find MarshalAsAttribute's constructor by signature, then invoke
var ctorParameters = new Type[] { typeof(UnmanagedType) };
var ctorInfo = typeof(MarshalAsAttribute).GetConstructor(ctorParameters);
var fields = typeof(MarshalAsAttribute).GetFields(BindingFlags.Public | BindingFlags.Instance);
var sizeConst = (from f in fields
where f.Name == "SizeConst"
select f).ToArray();
var marshalAsAttr = new CustomAttributeBuilder(ctorInfo,
new object[] { xmlField.MarshalAsUnmanagedType }, sizeConst, new object[] { xmlField.MarshalAsSizeConst });
fieldBuilder.SetCustomAttribute(marshalAsAttr);
}
/// <summary>
/// Add Metadata attribute
/// </summary>
/// <param name="xmlField"></param>
/// <param name="fieldBuilder"></param>
private void CreateRTMetadataAttribute(XmlStructFieldLayout xmlField, FieldBuilder fieldBuilder)
{
// Find MarshalAsAttribute's constructor by signature, then invoke
var metadataType = typeof(MetadataHelpAttribute);
var ctorInfo = metadataType.GetConstructor(Type.EmptyTypes);
List<PropertyInfo> lstPropInfo = new List<PropertyInfo>();
List<object> lstPropValues = new List<object>();
if(string.IsNullOrEmpty(xmlField.Metadata.Description) == false)
{
lstPropInfo.Add(metadataType.GetProperty("Description"));
lstPropValues.Add(xmlField.Metadata.Description);
}
if (string.IsNullOrEmpty(xmlField.Metadata.DisplayName) == false)
{
lstPropInfo.Add(metadataType.GetProperty("DisplayName"));
lstPropValues.Add(xmlField.Metadata.DisplayName);
}
var fields = metadataType.GetFields(BindingFlags.Public | BindingFlags.Instance);
var marshalAsAttr = new CustomAttributeBuilder(ctorInfo,
new object[] { },
lstPropInfo.ToArray(),
lstPropValues.ToArray());
fieldBuilder.SetCustomAttribute(marshalAsAttr);
}
/// <summary>
/// Create field
/// </summary>
/// <param name="typeBuilder"></param>
/// <param name="xmlStruct"></param>
/// <param name="xmlField"></param>
/// <returns></returns>
private FieldBuilder CreateRTFieldType(TypeBuilder typeBuilder, XmlStructLayoutRoot xmlStruct, XmlStructFieldLayout xmlField)
{
Type fieldType = null;
if (xmlField.NetType != TypeCode.Empty)
fieldType = FactoryStandardType.Get(xmlField.NetType);
if (string.IsNullOrEmpty(xmlField.RefType) == false)
{
// Find the type from current assembly
fieldType = RTAssemblyBuilder.GetType(xmlField.RefType, true);
}
if (xmlField.IsArray)
fieldType = fieldType.MakeArrayType();
FieldBuilder fieldBuilder = typeBuilder.DefineField(
xmlField.Name,
fieldType,
FieldAttributes.Public);
if (xmlField.CanMarshallAsStaticSize == true)
{
CreateRTMarshalAsAttribute(xmlField, fieldBuilder);
}
if(xmlField.Metadata != null)
{
CreateRTMetadataAttribute(xmlField, fieldBuilder);
}
return fieldBuilder;
}
