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From "Jeremias Maerki (JIRA)" <j...@apache.org>
Subject [jira] Created: (CAY-1256) [PATCH] Easily subclassable ExtendedEnumType for reusing an existing Enum
Date Thu, 13 Aug 2009 09:45:14 GMT
[PATCH] Easily subclassable ExtendedEnumType for reusing an existing Enum
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                 Key: CAY-1256
                 URL: https://issues.apache.org/jira/browse/CAY-1256
             Project: Cayenne
          Issue Type: Improvement
          Components: Cayenne Core Library
            Reporter: Jeremias Maerki


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.

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