[jboss-jira] [JBoss JIRA] Closed: (JASSIST-25) RuntimeException: cannot set to static - when calling CtClassType.setModifiers(int mod)

[Shigeru Chiba (JIRA)]

     [ http://jira.jboss.com/jira/browse/JASSIST-25?page=all ]

Shigeru Chiba closed JASSIST-25.
--------------------------------


> RuntimeException: cannot set to static - when calling CtClassType.setModifiers(int mod)
> ---------------------------------------------------------------------------------------
>
>                 Key: JASSIST-25
>                 URL: http://jira.jboss.com/jira/browse/JASSIST-25
>             Project: Javassist
>          Issue Type: Bug
>         Environment: Windows XP SP2, Mac OS 10.4
>            Reporter: Martin Burger
>         Assigned To: Shigeru Chiba
>
> Hello!
> I wrote a class that removes final modifier from given classes, here's the most relevant method:
> Code:
>     public void instrument(CtClass clazz) {
>         int modifiers = clazz.getModifiers();
>         if (Modifier.isFinal(modifiers)) {
>             logger.info("Will remove final modifier from class: " + clazz.getName());
>             logger.debug("Old modifiers: " + Modifier.toString(modifiers));
>             int newModifiers = Modifier.clear(modifiers, Modifier.FINAL);
>             logger.debug("New modifiers: " + Modifier.toString(newModifiers));
>             clazz.setModifiers(newModifiers);
>         } else {
>             logger.debug("Class is not final, nothing do change: " + clazz.getName());
>         }
>     }	
> Running my util on the JDK classes results in an exception:
> Code:
> Exception in thread "main" java.lang.RuntimeException: cannot set to static
>         at javassist.CtClassType.setModifiers(CtClassType.java:374)	
> The last lines of my log are:
> Code:
> 307    [           main] TRACE mon.javassist.FileInstrumenter  - Current jar entry: com/sun/corba/se
> /impl/corba/AnyImpl$AnyInputStream.class
> 307    [           main] INFO  y.framework.utils.FinalRemover  - Will remove final modifier from cla
> ss: com.sun.corba.se.impl.corba.AnyImpl$AnyInputStream
> 308    [           main] DEBUG y.framework.utils.FinalRemover  - Old modifiers: static final
> 308    [           main] DEBUG y.framework.utils.FinalRemover  - New modifiers: static	
> The class CtClassType contains the following lines:
> Code:
>     public void setModifiers(int mod) {
>         if (Modifier.isStatic(mod))
>             throw new RuntimeException("cannot set to static");
>         checkModify();
>         int acc = AccessFlag.of(mod) | AccessFlag.SUPER;
>         getClassFile2().setAccessFlags(acc);
>     }
> 	
> So, why is it not possible to change the modifier from "static final" to "static"? AFAIK, static inner classes are allowed, aren't they?
> Regards, Martin

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