Description Nicholas Lesiecki 2003-01-17 02:22:06 EST

The following precedence declaration is ambigous and should not be allowed:

public aspect Coordinator {
    declare precedence : *, Tracing, *;
}

To see why, examine the following example. Two aspects declare before advice on
doSomething(). Should Notification come before or after Tracing?

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public class SomeObject {

    public static void main(String[] args) {
        new SomeObject().doSomething();
    }
    
    public void doSomething() {
        System.out.println("Finally doing something.");
    }
}

public aspect Tracing {

    before() : call(void doSomething()){
        System.out.println("Tracing: logging call.");
    }
}

public aspect Notification {

    before() : call(void doSomething()){
        System.out.println("Notification:" +
            " Sending update somewhere.");
    }
}

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