Hi, I'm not a Scala Expert. I've ask around and one hypothesis is the @param annotation. Could you send me in the code and the instructions to run it. I want to see if I can improve the iPOJO manipulator to turn around this case.
Regards, Clement On 19.04.11 17:02, "Carlos Quiroz" <[email protected]> wrote: >Hi all > >I'm trying to use scala to produce iPojo components but I'm getting a >verification class error that I have traced to the way iPojo manipulates >the class files and generates new bytecodes. This happens when using the >@Requires annotation in the constructor. > >Here is what the java code looks like and the bytecodes produced: > ><code> >@Component >@Instantiate >class StartObservationFactory(@(Requires @param) epicsReader: >EpicsReader) extends KeywordActorsFactory { ></code> > >and iPojo makes a new constructor taking an InstanceManager and an >EpicsReader with the following bytecodes: > ><bytecode> >private >edu.gemini.aspen.gds.keywordssets.factory.StartObservationFactory(org.apac >he.felix.ipojo.InstanceManager, edu.gemini.epics.EpicsReader); > Code: > 0: aload_0 > 1: aload_2 > 2: invokevirtual #159; //Method >__setepicsReader:(Ledu/gemini/epics/EpicsReader;)V > 5: aload_0 > 6: invokespecial #160; //Method java/lang/Object."<init>":()V > 9: aload_0 > 10: aload_1 > 11: invokespecial #164; //Method >_setInstanceManager:(Lorg/apache/felix/ipojo/InstanceManager;)V > 14: return ></bytecode> > >I think the verify error I get is due to the call of __setepicsReader >before the call to the java/lang/Object constructor > >This should be exactly as the Java code below: > ><code> >@Component >@Instantiate(name = "epicsObserver") >public class EpicsObserverImpl implements EpicsObserver { > > public EpicsObserverImpl(@Requires JCAContextController >contextController) ></code> > >But this produces a different bytecode: > ><bytecode> >private >edu.gemini.epics.impl.EpicsObserverImpl(org.apache.felix.ipojo.InstanceMan >ager, edu.gemini.epics.JCAContextController); > Code: > 0: aload_0 > 1: invokespecial #67; //Method java/lang/Object."<init>":()V > 4: aload_0 > 5: aload_1 > 6: invokespecial #71; //Method >_setInstanceManager:(Lorg/apache/felix/ipojo/InstanceManager;)V > 9: aload_0 ></bytecode> > >Any ideas? I guess this is due to how the scala compiler produces the >classes that are then process by the iPojo manipulator but I'm not able >to propose a workaround now: > >Regards >Carlos Quiroz > >PS: This is the error I get when launching the bundle in felix: >[edu.gemini.aspen.gds.keywordssets.factory.StartObservationFactory-0] >createInstance -> The POJO constructor invocation failed : (class: >edu/gemini/aspen/gds/keywordssets/factory/StartObservationFactory, >method: <init> signature: >(Lorg/apache/felix/ipojo/InstanceManager;Ledu/gemini/epics/EpicsReader;)V) > Expecting to find object/array on stack >java.lang.VerifyError: (class: >edu/gemini/aspen/gds/keywordssets/factory/StartObservationFactory, >method: <init> signature: >(Lorg/apache/felix/ipojo/InstanceManager;Ledu/gemini/epics/EpicsReader;)V) > Expecting to find object/array on stack > at java.lang.Class.getDeclaredConstructors0(Native Method) > at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389) > at java.lang.Class.getConstructor0(Class.java:2699) > at java.lang.Class.getDeclaredConstructor(Class.java:1985) > at >org.apache.felix.ipojo.InstanceManager.createObject(InstanceManager.java:6 >38) > at >org.apache.felix.ipojo.InstanceManager.getPojoObject(InstanceManager.java: >858) > at >org.apache.felix.ipojo.handlers.lifecycle.callback.LifecycleCallbackHandle >r.__stateChanged(LifecycleCallbackHandler.java:156) > at >org.apache.felix.ipojo.handlers.lifecycle.callback.LifecycleCallbackHandle >r.stateChanged(LifecycleCallbackHandler.java) > at >org.apache.felix.ipojo.InstanceManager.setState(InstanceManager.java:471) > at >org.apache.felix.ipojo.InstanceManager.start(InstanceManager.java:353) > at >org.apache.felix.ipojo.ComponentFactory.createInstance(ComponentFactory.ja >va:166) > at >org.apache.felix.ipojo.IPojoFactory.createComponentInstance(IPojoFactory.j >ava:301) > at >org.apache.felix.ipojo.IPojoFactory.createComponentInstance(IPojoFactory.j >ava:238) > at >org.apache.felix.ipojo.InstanceCreator$ManagedInstance.create(InstanceCrea >tor.java:343) > at >org.apache.felix.ipojo.InstanceCreator.addInstance(InstanceCreator.java:89 >) > at org.apache.felix.ipojo.Extender.parse(Extender.java:269) > at >org.apache.felix.ipojo.Extender.startManagementFor(Extender.java:208) > at org.apache.felix.ipojo.Extender.access$600(Extender.java:52) > at >org.apache.felix.ipojo.Extender$CreatorThread.run(Extender.java:682) > > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [email protected] >For additional commands, e-mail: [email protected] > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
