A PropertyModel, Label and a list

Just a quick tip that I didn’t realise I could do , if say you can an Entity:

public class Person {
String name;
List emails;
}

public class Email {
String email;
}

Say for whatever reason I only want to show the first email in the list you can do the following using a CompoundPropertyModel :

...
setModel(new CompoundPropertyModel
(person);
add(new Label("name"));
add(new Label("email", new PropertyModel(item.getModel(), "emails[0].email")));

Notice the syntax for the PropertyModel and how you get directly index the list:

emails[0].email

. Wicket is smart enough to take care of nulls, which is why wicket is wicked.