Sorry to bother you, but Im stuck with a DuplicateMemberException:
Caused by: java.lang.RuntimeException:
javassist.bytecode.DuplicateMemberException: duplicate method:
extractRequestParameters in de.wiv.tapestryportlet2.pages.Index
at
org.apache.tapestry5.internal.services.InternalClassTransformationImpl.addOverrideOfSuperclassMethod(InternalClassTransformationImpl.java:1458)
at
org.apache.tapestry5.internal.services.InternalClassTransformationImpl.findOrOverrideMethod(InternalClassTransformationImpl.java:1412)
at
org.apache.tapestry5.internal.services.InternalClassTransformationImpl.findOverrideOrCreateMethod(InternalClassTransformationImpl.java:1397)
at
org.apache.tapestry5.internal.services.InternalClassTransformationImpl.getOrCreateMethod(InternalClassTransformationImpl.java:1392)
at
org.apache.tapestry5.portlet.services.PortletRequestParameterWorker.transform(PortletRequestParameterWorker.java:48)
at
$ComponentClassTransformWorker_12af2cfc4c4.transform($ComponentClassTransformWorker_12af2cfc4c4.java)
at
$ComponentClassTransformWorker_12af2cfc4c5.transform($ComponentClassTransformWorker_12af2cfc4c5.java)
at
$ComponentClassTransformWorker_12af2cfc4b6.transform($ComponentClassTransformWorker_12af2cfc4b6.java)
at
org.apache.tapestry5.internal.services.ComponentClassTransformerImpl$1.run(ComponentClassTransformerImpl.java:194)
... 250 more
Caused by: javassist.bytecode.DuplicateMemberException: duplicate
method: extractRequestParameters in de.wiv.tapestryportlet2.pages.Index
at javassist.bytecode.ClassFile.testExistingMethod(ClassFile.java:637)
at javassist.bytecode.ClassFile.addMethod(ClassFile.java:613)
at javassist.CtClassType.addMethod(CtClassType.java:1320)
at
org.apache.tapestry5.internal.services.InternalClassTransformationImpl.addOverrideOfSuperclassMethod(InternalClassTransformationImpl.java:1444)
... 258 more
This is my worker:
public class PortletRequestParameterWorker implements
ComponentClassTransformWorker {
private final ValueEncoderSource valueEncoderSource;
private final ComponentClassCache classCache;
private final RequestParameterContext requestParameterContext;
private final ComponentSource componentSource;
public PortletRequestParameterWorker(ValueEncoderSource
valueEncoderSource,
ComponentClassCache classCache, RequestParameterContext
requestParameterContext,
ComponentSource componentSource) {
this.valueEncoderSource = valueEncoderSource;
this.classCache = classCache;
this.requestParameterContext = requestParameterContext;
this.componentSource = componentSource;
}
public void transform(final ClassTransformation transformation,
MutableComponentModel model) {
transformation.addImplementedInterface(RequestParameterExtractor.class);
TransformMethodSignature extractMethod = new
TransformMethodSignature(Modifier.PUBLIC,
"Map<String, String>", "extractRequestParameters",
null, null);
// if (transformation.isDeclaredMethod(extractMethod)) {
// return;
// }
transformation.getOrCreateMethod(extractMethod).addAdvice(new
ComponentMethodAdvice(){
public void advise(ComponentMethodInvocation invocation) {
Map<String, String> requestParameters = new
HashMap<String, String>();
for (TransformField field :
transformation.matchFieldsWithAnnotation(ActivationRequestParameter.class))
{
String parameterName = getParameterName(field,
field.getAnnotation(ActivationRequestParameter.class));
Class fieldType =
classCache.forName(field.getType());
FieldAccess access = field.getAccess();
ValueEncoder encoder =
valueEncoderSource.getValueEncoder(fieldType);
Object value =
access.read(invocation.getInstance());
if (value == null)
continue;
String clientValue = encoder.toClient(value);
requestParameters.put(parameterName, clientValue);
}
invocation.overrideResult(requestParameters);
}
});
}
private String getParameterName(TransformField field,
ActivationRequestParameter annotation)
{
if (annotation.value().equals(""))
return field.getName();
return annotation.value();
}
}
Any ideas?
Hi !
Tapestry 5.2 has a brand new API for class manipulation in worker, you have
to provide the method signature and implement the logic in a
ComponentMethodAdvice (see PropertyWorker sources to have a simple example)
HTH
2010/9/7 Markus Feindler<markus.feind...@gmx.de>
So, I tried to follow your advice, but I don't see how to add a new method
after calling "transformation.addImplementedInterface(MyInterface.class)".
The documentation states to use transformation.getOrCreateMethod, but where
to define the message body?
Actually,
I would implement a ClassTransformation and add it to
contributeComponentClassTransformWorker (see Tapestry Module), This worker
should add and implement an interface that contains the method to extract
useful information from the page
Then in your PageResponseRenderer, you can use ComponentSource to get the
page instance, cast it to your interface and call the method.
2010/9/6 Markus Feindler<markus.feind...@gmx.de>
Thats the class I discovered earlier at work.
Now my question is how to get ClassTransformation and
MutableComponentModel
from the Page Object in the PageResponseRenderer?
Thanks for you help/hints.
Regards markus
Hi
Logic is enclosed in ActivationRequestParameterWorker, i think you can
adapt
this to your needs and extract values. At the moment, I don't see any
other
way to identify ActivationRequestParameters during link creation.
2010/9/6 Markus Feindler<markus.feind...@gmx.de>
i would say you can get them from
Request directly
This only works for the current request. I need to get the
parameters,
which will be set for the next request/redirect. It would be possible
to
write get methods for the ActivationRequestParameters, but that would
not
be
the right way. I need to find out how that is solved internally.
Oh sorry, i had mis-read your first message. I didn't get deep into
this
new
feature at the time, but at first glance, i would say you can get them
from
Request directly. Maybe, you can implement a worker that will be in
charge
of implementing an interface that will contain the method that return
the
values.
I will go deeper to see if there is not a more simple way of doing
this.
2010/9/6 Markus Feindler<markus.feind...@gmx.de>
Thats what Im doing right now for the PageActivationContext, but I
also
need the values for the ActivationRequestParameters (introduced in
5.2:
http://tapestry.apache.org/tapestry5.2-dev/apidocs/org/apache/tapestry5/annotations/ActivationRequestParameter.html
).
Hi
So why not passivate the page, see PageActivationContextCollector ?
This
is
how it works to create links.
2010/9/5 Markus Feindler<markus.feind...@gmx.de>
No, Im trying to upgrade "my" portlet implementation from 5.1 to
5.2
and
up to now the activationrequestparameters aren't put in the url,
cause
I
have to adjust my former 5.1 custom response renderer. If the
Request
is
an
ActionRequest (see Portlet lifecycle) you can't write output into a
stream
instead a redirect is done internally in the portlet container.
Therefore
I
have to add the parameters to the ActionReponse
(_actionResponse.setRenderParameter). In order to do so I need to
get
the
parameters.
That's not enough details.
-- Josh
On Sep 5, 2010, at 9:51 AM, Markus Feindler<
markus.feind...@gmx.de>
wrote:
Need it for portlet implementation.
Hi
What is the purpose ? I guess you are dealing with some kind of
dynamic
stuff, please can you give more details ?
2010/9/5 Markus Feindler<markus.feind...@gmx.de>
Hey folks,
I need to access page field values annotated with
ActivationRequestParameters in order to retrieve the values.
Reflection
doesnt work, because the fields are private and a
java.lang.IllegalAccessException is thrown. Whats the right way
to
retrieve
the values / activation request parameters?
Regards
Markus
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