[aspectj-dev] Conflicts when extending abstract aspect

["Eric Simmerman" <eric.simmerman@xxxxxxxxxx>]

I'm having trouble extending an abstract aspect and hope someone can give me
some advice.
I'm packaging an abstract aspect that provides introduction to a marker
interface in a common code base. I extend the abstract aspect with an empty
concrete aspect and it provides introduction correctly within the common
code base.
When I use that common code base as a jar/library in a new project, I'd like
the same introduction performed on classes that implement the marker
interface from the common jar. I've again, extended the abstract aspect with
an empty concrete aspect, but when I attempt to compile I receive the
following:


\patterns\SingletonAspectImpl.java:12:1: public static SingletonAspectImpl
SingletonAspectImpl.aspectOf() conflicts with public static SingletonAspect
Sing
letonAspect.aspectOf(): defined in same type

\patterns\SingletonAspectImpl.java:12:1: public static boolean SingletonAsp
ectImpl.hasAspect() conflicts with public static boolean
SingletonAspect.hasAspe
ct(): defined in same type
    [ajc] [ERROR] public aspect SingletonAspectImpl extends SingletonAspect

here's my code:

package com.common;
public abstract aspect SingletonAspect
{
 public static Object (SingletonPattern+).instance=null;

 public (SingletonPattern+).new() { super(); initialize(); }

 public static Object (SingletonPattern+).getInstance()
 {
  return instance;
 }

 after(): staticinitialization(SingletonPattern+)
 {
  Class SingletonPattern = thisJoinPoint.getSignature().getDeclaringType();
  try
  {
   java.lang.reflect.Field theInstance =
SingletonPattern.getField("instance");
   Object singletonObject = SingletonPattern.newInstance();
   if (theInstance.get(null)==null)
   {
    theInstance.set(null,singletonObject);
   }

  }
  catch (Exception ex)
  {
   System.err.println("Singleton pattern failed for
"+SingletonPattern.getName()+": "+ex);
  };
 }
}

// This one compiles without error
package com.common;
public aspect SingletonAspectImpl extends SingletonAspect
{}

// This one does not compile, with the conflicts listed above
package com.derivative;
public aspect SingletonAspectImpl extends SingletonAspect
{}


Can anyone out there point me to a solution?

Thanks,
-Eric Simmerman