[jboss-dev-forums] [Design of Management Features on JBoss] - Re: JBAS-6672, null values and defaults

[charles.crouch@jboss.com]

"emuckenhuber" wrote : Although i still think doing managedProperty.setValue(null); should not replace it with a default value.
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Ok, so what should we use?

In use case 1) we need to specify "I want to use the default" and in use case 3) we need to specify "I want to use null/nothing/blank".

So maybe for use case 1) we have
managedProperty.setDefaultValue()
and for 3) we have
managedProperty.setValue(null)

or alternatively (but this seems even more of a hack)
1) managedProperty.setValue(null);
3) managedProperty.setValue("");

Because the template will specify an actual value for the default, e.g.  20, its of no use to us when the user wants to persist the "default value" since the "default value" may change over time.  This is exactly analogous to the case of defining the resources configuration via xml. If you had a template with every xml element specified in there and persisted that, it would be a different value than if you just included the xml elements you wanted to specify, letting the server set the other ones as it saw fit.

Cheers

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