org.aspectj/docs/teaching/exercises/answers/Answer3c.java

/* *******************************************************************
 * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
 * All rights reserved. 
 * This program and the accompanying materials are made available 
 * under the terms of the Common Public License v1.0 
 * which accompanies this distribution and is available at 
 * http://www.eclipse.org/legal/cpl-v10.html 
 *  
 * Contributors: 
 *     PARC     initial implementation 
 * ******************************************************************/

package answers;

import support.Log;

import figures.Point;
import figures.Group;
import figures.FigureElement;

aspect Answer3c {
    private Group Point.enclosingGroup = null;

    before(Point p, Group g):
	execution(void add(FigureElement)) && args(p) && target(g) {
	p.enclosingGroup = g;
    }

    before(Point p):
	call(void move(int, int)) && target(p) {
	Log.log("moving as a part of " + p.enclosingGroup);
    }

}