Thanks for the quick answer Howard,
I tried again to inject the service into itself, but I stumbled onto
two problems again, I solved only the first one :
- first you were right there was an error in the beginning of
the console that I did not saw. It said that it was impossible to
instantiate my adapters.
I finally found out that it was because I was missing a constructor
without parameters ( I was using constructor only injection ) in my
adapter. I find this a little bit odd since I thought Java was always
providing one constrcutor by default even if not explicitly written.
- second problem now that the adapters are instantiated again, the
service is still not injected in itself. I tried all the ways I am aware
of (adding also getter/setter in my adapter) :
- <construct><service>XmlAdapter</service></construct>
- <construct service-id-property="">...
- <construct><set-service property=""service-id=""/>...
But none of them is working : I got an "element not allowed here" error
in the console. So I had a look at the hivemodule.xml in the
hivemind-lib.jar, and for the service-point AdapterRegistryFactory
element the schema is as follow:
<parameters-schema>
<element name="construct">
<attribute name="configuration-id" translator="configuration"
required="true"> A configuration utilizing the
hivemind.lib.AdapterRegistry schema, which defines the classes
and matching adapters. </attribute>
<conversion
class="org.apache.hivemind.lib.adapter.AdapterRegistryParameter">
<map attribute="configuration-id" property="contributions"/>
</conversion>
</element>
</parameters-schema>
So I suppose that means I can't because the schema definition for
AdaptaterRegistry is a subset of BuilderFactory's one.
Or am I missing some other way to do this ?
Olivier.
Le Sat, 5 Feb 2005 15:52:24 -0500
Howard Lewis Ship <[EMAIL PROTECTED]> a �crit:
> 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.
> >
> > -------------------------------------------------------------------
> > -- To unsubscribe, e-mail:
> > [EMAIL PROTECTED] For additional
> > commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
>
> --
> 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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