Is there a way in Java to detemine if a method is called in a static initializer (or not)?

Question

as in a way to check appropriate use of a static registry:

class AClass {
     static final IDType = IDregistry.registerId(...);
}

class IDRegistry {
     public static registerId(...)
     {
          if(isCalledInStaticInitializer()) {
               return(new IDType(...));
          }
          assert false : "NO NO - can't do this !!!";
     }
}

Answer 1

I don't think you should do this. But if you insist, this would get you started:

public static boolean isCalledInStaticInitializer()
{
    for (StackTraceElement ste : Thread.currentThread().getStackTrace())
    {
        if("<clinit>".equals(ste.getMethodName()))
        {
            return true;
        }
    }
    return false;
}

Source: In section 2.9 of the JVM Specification ("Special Methods"):

"A class or interface has at most one class or interface initialization method and is initialized (§5.5) by invoking that method. The initialization method of a class or interface has the special name <clinit>"