Adam,
OK got it to work, the following is what I did along with a little
bit of code.
In hivemodule.xml:
<service-point id="MySqueezeAdaptor"
interface="com.azudio.project1.MySqueezeAdaptor">
<invoke-factory>
<construct class="com.azudio.project1.MySqueezeAdaptor"/>
<set-object property="myService"
value="spring:myService" />
</invoke-factory>
</service-point>
<contribution configuration-id="tapestry.data.SqueezeAdaptors">
<adaptor object="service:MySqueezeAdaptor" />
</contribution>
The Adaptor class:
*Note: This is not a complete implementation, ie: the adaptor isn't
really useful but just demonstrates how to get a SqueezeAdaptor set
up and registered, although it works, it squeezes a SomeBase instance
and reconstitutes it later.
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tapestry.services.DataSqueezer;
import org.apache.tapestry.util.io.SqueezeAdaptor;
public class MySqueezeAdaptor implements SqueezeAdaptor {
private static final Log log = LogFactory.getLog
(MySqueezeAdaptor.class);
private MySpringBean _myService;
public MySpringBean getMyService(){
return _myService;
}
public void setMyService(MySpringBean myService){
_myService = myService;
}
private static final String PREFIX = "H";
public String getPrefix() {
return PREFIX;
}
public Class getDataClass() {
log.debug("Getting DataClass");
return SomeBase.class;
}
public String squeeze(DataSqueezer datasqueezer, Object entity) {
log.debug("Squeezing Object");
// Will return something like: "H:XXX:1234"
return getPrefix() + ":" + "XXX:" + ((SomeBase)entity).getId();
}
public Object unsqueeze(DataSqueezer dataSqueezer, String
stringRepresentation) {
log.debug("Unsqueezing Object");
String parts[] = stringRepresentation.split(":");
Long id = Long.parseLong(parts[2]);
log.debug("Id: " + id);
return getMyService().getSomeBase(id);
}
}
I'm assuming that the Spring context is all set up etc.
Hope that helps.
Adam.
On 3 Sep 2005, at 01:14, Adam Greene wrote:
Ok, first thing right off. You do not need to subclass
BaseEngine. The steps are :
1. Your class implements org.apache.tapestry.services.DataSqueezer.
2. Setup your class as a service in hivemodule.xml:
3. Then contribute to the tapestry.data.SqueezeAdaptors
configuration point, put something like this in your hivemodule.xml:
<contribution configuration-id="tapestry.data.SqueezeAdaptors">
<adaptor object="service:YourAdaptor"/>
</contribution>
if you look at tapestry-4.0.jar!/META-INF/tapestry-data.xml, you
will see how this all works. The examples there are based on
"instance:" but you can use "service:"
----- Original Message ----- From: "Adam Henderson Azudio"
<[EMAIL PROTECTED]>
To: "Tapestry users" <tapestry-user@jakarta.apache.org>
Sent: Friday, September 02, 2005 11:22 AM
Subject: T4 DataSqueezer/SqueezeAdaptor, Spring & Hibernate
Hi,
I've written a SqueezeAdaptor for use with my Hibernate entities
and it works well in T3.
My HibernateSqueezeAdaptor unsqueezes the string by decoding a
entity type code along with the id, then it accesses my Spring
appService bean and asks it to retrieve my entity.
I'm attempting to upgrade/convert to T4 and I'm a bit stumped as
how to do the conversion.
How do I create and register a SqueezeAdaptor that uses a Spring
service object, what do I put in my subclass of BaseEngine?, do I
need to subclass BaseEngine? How do I inject my spring service
into my adaptor? Do I need a hivemodule.xml? if so what do I put
in it?
What would be the logical steps needed to implement this. Also is
there any security issues with what I'm doing?
Many thanks
Adam.
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