[jbossseam-issues] [JBoss JIRA] Closed: (JBSEAM-1709) seam-gen generated code throws exception

Norman Richards (JIRA) jira-events at lists.jboss.org
Wed Aug 6 11:56:56 EDT 2008


     [ https://jira.jboss.org/jira/browse/JBSEAM-1709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Norman Richards closed JBSEAM-1709.
-----------------------------------

    Resolution: Cannot Reproduce Bug


It worked for me.  If you still see the error, can you attach your project?

> seam-gen generated code throws exception
> ----------------------------------------
>
>                 Key: JBSEAM-1709
>                 URL: https://jira.jboss.org/jira/browse/JBSEAM-1709
>             Project: Seam
>          Issue Type: Bug
>          Components: Tools
>    Affects Versions: 2.0.0.BETA1
>         Environment: Seam (CVS checkout from today), JBoss 4.2.1, Java 6, Windows XP
>            Reporter: Ralph Schaer
>            Assignee: Norman Richards
>             Fix For: 2.1.0.BETA1
>
>
> A seam-gen generated application (with generated entities) is throwing the following error, when I click for example on the column header in a list (sort) or when I try to create a new object.
> Exception during request processing:
> Caused by java.lang.IllegalArgumentException with message: "Could not invoke method by reflection: Instance.getComponent() on: test.CarHome"
>   org.jboss.seam.util.Reflections.invoke(Reflections.java:31)
>   org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
>   org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
> Caused by java.lang.IllegalArgumentException with message: "object is not an instance of declaring class"
>   sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>   sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>   sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>   java.lang.reflect.Method.invoke(Method.java:597)
>   org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
>   org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
>   org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
>   org.jboss.seam.persistence.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:45)
>   org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
>   org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
>   org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
>   org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:38) 
>   org.jboss.seam.util.Work.workInTransaction(Work.java:39)
>   org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:32)
>   org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
>   org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
>   org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) 
>   org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
>   org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:151)
>   org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:87)
>   test.CarHome_$$_javassist_2.getComponent(CarHome_$$_javassist_2.java)
>   org.jboss.seam.core.Validators.getValidator(Validators.java:85)
> Steps to reproduce the error
> 1. Create a table in the database (Example with mysql. I guess the database does not matter)
> CREATE TABLE `test`.`Car` (
>   `id` INTEGER UNSIGNED NOT NULL DEFAULT NULL AUTO_INCREMENT,
>   `name` VARCHAR(255) NOT NULL,
>   PRIMARY KEY (`id`)
> )
> ENGINE = InnoDB;
> 2. seam setup (ear or war deployment does not matter. Problem exists in both deployment modes)
> 3. seam new-project
> 4. seam generate-entities
> 5. seam explode (jboss is already running)
> 6. Start the broser and type http://localhost:8080/name_of_webapp
> 7. Browser shows the Welcome screen. Everything looks fine.
> 8. Click on "Car List "
> 9. Click on "Create car"
> 10. Exception 

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