enums as attributes

Serialization of Java 5 Enum to/from xml attribute doesn't work:
xstream.useAttributeFor(MyEnum.class)

unless SingleValueConverter is registered:
xstream.registerConverter(EnumSingleValueConverter.create(MyEnum.class));

below (and in attachment) is the converter code:

public class EnumSingleValueConverter<T extends Enum<T>>
extends EnumConverter implements SingleValueConverter {

private Class<T> enumType;

public static <V extends Enum<V>> SingleValueConverter create(Class<V> enumClass)

{ return new EnumSingleValueConverter<V>(enumClass); }

private EnumSingleValueConverter(Class<T> newEnumType)

{ this.enumType = newEnumType; }

public boolean canConvert(Class type)

{ return type == enumType; }

public Object fromString(String str)

{ return Enum.valueOf(enumType, str); }

public String toString(Object obj)

{ return obj.toString(); }

}

it should be possible to add support for that in XStream facade so user wouldn't have to register anything.