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import java.io.Serializable;
abstract aspect Trace {
abstract pointcut targets();
/*
* toString() can throw exceptions, so we'll print
* the java.lang.Class instead.
*/
before (): targets() {
System.out.println("entering " + thisJoinPoint);
}
after (): targets() {
System.out.println("exiting " +
thisJoinPointStaticPart);
}
after () throwing (Throwable t): targets() {
System.out.println("throwing " + t);
}
after () throwing (java.io.IOException ioe): targets() {
System.out.println("throwing " + ioe);
}
after () returning (Object o): targets() {
System.out.println("returning " + (o!=null ? o.getClass() : null));
}
private static int initCounter() {
return 0;
}
//private int Serializable.counter = initCounter();
}
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