Wicket auto-complete text fields

It's modern practice in web applications to augment text fields with suggestions while one types. There are plenty of Javascript libraries out there to do that, and plenty of integrations with the Java web framework Wicket out there as well, but somehow none quite did exactly what I wanted, so I've rolled my own Wicket code (based on JQuery).

What I wanted, but what other Wicket / Javascript libraries did not do, were:

• I wanted to allow the user to type multiple values. If you compose a message in Gmail, you want to be able to enter multiple recipients, not just one.
• I wanted to have the option to either allow the user to type in options which were not presented (e.g. like when composing a message in Gmail, or typing in tags into Stack Overflow) or restrict them to the options presented (like recipients in Facebook)
• I wanted to either allow the options to be included in the HTML page (e.g. for a set of 10 options, there is no point forcing the user to wait for a server round-trip to fetch matching options), or allow the options to be fetched from the server (e.g. if there are 1M options, they can't be included in the HTML page).
• I wanted the API to be incredibly simple. I want to include a single <input> into the Wicket HTML document, create the object in Java using a constructor, and attach the data source (client-side or server-side) in a single line.

Surprisingly all of the above are not particularly easy to achieve simultaneously. But they are now done:

• MultipleValueAutoSuggestTextField (auto-suggest = can also type in other values)
• MultipleValueAutoCompleteTextField (auto-complete = only those values allowed)

And coupled with my newly created extensive multi-lingual location hierarchy database (hierarchy in the sense of 2nd district -> Vienna -> Austria -> Europe -> World, multi-lingual in the sense I have these displayable strings in various languages), allows me to create a MultipleValueLocationTextField subclass, which can be included in a host HTML page in one line of HTML and one line of Java, and which synchronizes its data with a Location[] in the client code (e.g. straight from/to a domain object), and it looks like this:

(Alas this code only works with Wicket 1.4 and I never upgraded it to work with current versions.)