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

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