[CAY-540] extended type and subclasses

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.2 branch
• Fix Version/s: 3.0M1, 3.0
• Component/s: Core Library
• Assignee: Unassigned
• Reporter: Tore Halset
• Created: 03/May/06 19:36
• Updated: 08/May/10 15:41
• Resolved: 22/Nov/06 07:11

Description

Tore:
I am using an ExtendedType to map a JTS Geometry to a CLOB as done here:

http://objectstyle.org/confluence/display/CAY/Mapping+JTS+Geometries

This has been working ok, but I have only used it for reading. Trying to use the same ExtendedType for writing got me into an annoying problem. On writing I typically set a Polygon or MultiPolygon on the CayenneDataObject. P and MP are both subclasses of the mapped Geometry, but are not mapped correctly as the map only contains class names.

I have updated the example in the wiki to reflect this "problem".

Perhaps ExtendedType should map a Class (and handle subclasses) instead of a String holding a class name? Just wanted to discuss it here before creating a feature request for it.

Andrus:
Yeah, let's open a feature request for it. As for using Class instead of String class name as map keys - this can cause troubles with nested ClassLoaders. I guess instead we may reimplement 'ExtendedTypeMap.getRegisteredType(Class)' to scan the class hierarchy up to, but not including, java.lang.Object before falling back to a default type.