code: public Object getActivity(ActivityHandle ah) {
  	    if (tracer.isFineEnabled()) {
  	    	tracer.fine("get Activity with ActivityHandle "+ah.toString());
  	    }
  	    // if handle exists then recreate activity
  	    return activities.get(ah);
  	}
docs: /*
  (non-Javadoc)
  @see javax.slee.resource.ResourceAdaptor#getActivity(javax.slee.resource.ActivityHandle)