[jira] [Closed] (TAP5-1754) BeanModelSource cannot introspect CGLIB proxies and anonymous classes

["Howard M. Lewis Ship (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-1754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Howard M. Lewis Ship closed TAP5-1754.
--------------------------------------

    Resolution: Won't Fix

> BeanModelSource cannot introspect CGLIB proxies and anonymous classes
> ---------------------------------------------------------------------
>
>                 Key: TAP5-1754
>                 URL: https://issues.apache.org/jira/browse/TAP5-1754
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.2.6
>            Reporter: Julian Vassev
>            Priority: Minor
>              Labels: bulk-close-candidate
>
> When T5 is trying to create a BeanModel for displaying a row in a <t:grid> it examines the class of (maybe) the first element of the source list.
> Sometimes I put CGLIB proxies or Anonymous classes in the source list.
> When the class is anonymous, T5 complains about not being able to access  the generated class
> java.lang.IllegalAccessError: tried to access class pkg.impl.FileSystemArchiveRepository$3$1 from class $PropertyConduit_133bd7cf475
> When accessing a CGLIB proxy:
> Render queue error in SetupRender[AddDomain:grid.columns]: Failure reading parameter 'model' of component AddDomain:grid: Exception generating conduit for expression 'exposeProxy': Class pkg.impl.DomainImpl does not contain a property (or public field) named 'exposeProxy'
> I solved the problem by using T5 AOP (really great feature) but think it should be handled by Tapestry:
>     @Match("BeanModelSource")
>     public static void adviseAll(MethodAdviceReceiver receiver) {
>         MethodAdvice advice = new MethodAdvice() {
>             @Override
>             public void advise(Invocation invocation) {
>                 if (invocation.getMethodName().startsWith("create")) {
>                     Class<?> clazz = (Class<?>) invocation.getParameter(0);
>                     if (clazz.isAnonymousClass()) {
>                         invocation.override(0, findFirstNonAnonymousParent(clazz));
>                     }
>                     //spring aop
>                     if (AopUtils.isCglibProxyClass(clazz)) {
>                         invocation.override(0, (clazz.getSuperclass()));
>                     }
>                     invocation.proceed();
>                 }
>             }
>         };
>         receiver.adviseAllMethods(advice);
>     }
>     public static Class<?> findFirstNonAnonymousParent(Class<?> clazz) {
>         while (clazz.isAnonymousClass()) {
>             clazz = clazz.getSuperclass();
>         }
>         return clazz;
>     }



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