[CAY-1256] [PATCH] Easily subclassable ExtendedEnumType for reusing an existing Enum

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: Undefined future
• Component/s: Core Library
• Assignee: Unassigned
• Reporter: Jeremias Maerki
• Created: 13/Aug/09 09:44
• Updated: 06/Jan/10 10:03

Description

I've had this enum class that has character codes that I use in a CHAR(1) field.

public enum Status {
NEW('N'), PENDING('P'), CANCELLED('X'), CLOSED('C');
[..]

I didn't want that enum class to introduce a dependency on Cayenne (through the ExtendedEnumeration interface. So I changed ExtendedEnumType a bit so you can support that enum class with just a few lines of code and without using ExtendedEnumeration.

Please see the patch for an example. I've written a test case for this although this just covers the materialization.

In the application code I can now simply do this to register the type:
node.getAdapter().getExtendedTypes().registerType(new StatusExtendedEnumType());
(my StatusExtendedEnumType is basically the same as the MockEnumWithCodeEnumType in the patch)

I hope you find this useful, too. Patch is against Cayenne Trunk.