ok, I see where you're going with this.
very cool.
My enum is in a helper class and I started writing conversion methods in the
helper class. But I like the way you wrapped your conversion methods
in a class to use on the Page class.
I also gave some thought last night to using a Map<Integer, String> with
the same conversion technique. Then my dropdown uses Integers and
I can do a map.get() in getDisplayValue() for the String.
Thanks for your help, Igor.
igor.vaynberg wrote:
>
> you are passing a list of enum objects into the list model of the dropdown
> choice, that means the one selected object out of that list - of type enum
> -
> will be set into the model object.
>
> so there are two ways to do this
>
> you can pass in a list of ints into the choice component, that way the
> selected int will be set into your model
>
> or you can write a model decorator that does the transform
>
> class SizeEnumToIntModel extends Model {
> private final IModel delegate;
> public SizeEnumToIntModel(IModel delegate) {
> this.delegate=delegate; }
>
> public Object getObject(Component c) {return Size.forValue(
> delegate.getObject(c); // convert int to enum }
> public void setObject(Component c, Object o) {
> delegate.setObject(((Size)o).getintvalue();
> // convert enum to int }
> public void detach() { delegate.detach(); }
> }
>
> then
>
> new DropDownChoice(id, new SizeEnumToIntModel(new PropertyModel(form,
> "size"))....
>
> you lose the nice compound model syntax, but oh well
>
> you might also be able to use a convert to accomplish the same, but i
> havent
> looked into that
>
>
> -igor
>
>
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