You should be able to inject a service into itself. It's a proxy that
gets injected. Make sure there weren't any errors in the console.
On Sat, 5 Feb 2005 18:35:32 +0100, Olivier Bourgeois <[EMAIL PROTECTED]> wrote:
> Hello all,
>
> I'm playing with hivemind 1.1-alpha AdapterRegistry and now that I got
> some simple example working, I'm asking myself a question I can't find
> an answer :)
> Is there a way to do- kind of - recursion with the AdaptaterRegistry?
> I
> explain myself: suppose I want to create an XmlAdapter service with this
> interface :
>
> public interface XmlAdapter {
> toXml (Object o);
> }
>
> I could define then :
>
> public class StringAdapter {
> public String toXml (Object o) {
> String value = (String) o;
> return value.trim();
> }
> }
>
> This works fine for "converting" a String to XML.
> But now suppose I got this object to adapt :
>
> public class Name {
> private String firstName;
> private String lastName;
> // + getters & setters
> }
>
> A great trick would be to be able to do something like this :
>
> public class NameAdapter {
> public String toXml (Object o) {
> Name value = (Name) o;
> String ret = new String("<Name><FirstName>");
>
> // Here do some trick to get a StringAdapter from the registry
>
> ret.append(stringAdapter.toXml(value.getFirstName()));
> ret.append("</FirstName><LastName>");
> ret.append(stringAdapter.toXml(value.getLastName()));
> ret.append("</LastName></Name>");
> return ret;
> }
> }
>
> Of course I tried to inject the service in
> itself but this leads only to nullpointerexception ( well, I expected
> something like this anyway...).
>
> So, is there a way to do this ? Or should I try another way ? ( with
> the new Chain service maybe ? )
>
> thanks in advance for any help/pointers,
>
> Olivier.
>
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>
--
Howard M. Lewis Ship
Independent J2EE / Open-Source Java Consultant
Creator, Jakarta Tapestry
Creator, Jakarta HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
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