CODEWITHSUNDEEP
javawicket
Domas Poliakas
Domas Poliakas

Reputation: 876

Getting the property expression from a property model in wicket

I've got a form on the page whose model is a CompoundPropertyModel. I've got a bunch of children on this form.

My goal is to create a behaviour, which could determine what property expression the object the behavior is being attached to has (or if it has a non-property expression throw an exception).

I'm trying to do this in the bind method so that in case it cannot be configured I would catch this early.

I got as far as extracting the model from the component. I was about to do an instanceof when I realised that the model retrieved could not necessarily be an AbstractPropertyModel as I've been expecting, since I am doing this using a CompountPropertyModel.

So my question is: is there a reliable way I can find the property expression of a given model without knowing the model's type, but knowing it is a property model? (When I say 'a property model' I mean any model that is based on a property expression)

Upvotes: 0

Views: 603

Answers (1)

svenmeier
svenmeier

Reputation: 5681

In Wicket 'knowing it is a property model' means it's an AbstractPropertyModel - thus your instanceof check should work fine.

If you rely on CompoundPropertyModel implicitly initialising your model, then it will still be an AbstractPropertyModel. Make sure that you have added the component to the parent providing the CompoundPropertyModel before querying for the model though.

Upvotes: 2

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