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import org.aspectj.testing.Tester;
import org.aspectj.runtime.NoAspectException;
public class Simple {
public static void main(String[] args) {
C c = new C();
c.m();
// aspect A is bound to the base class C
Tester.checkEqual(c.history.toString(), "A.before, C.m, ", "C");
SubC1 subc1 = new SubC1();
subc1.m();
// aspect A is also bound to the subclass SubC1
//Tester.checkEqual(subc1.history.toString(), "A.before, SubC1.m, C.m, ", "SubC1");
SubC2 subc2 = new SubC2();
subc2.m();
// aspect A is overriden by SubA on the class SubC2
//Tester.checkEqual(subc2.history.toString(), "SubA.before, A.before, C.m, ", "SubC2");
// retrieving the SubA aspect using its super's aspectOf static method
//Tester.check(A.aspectOf(subc2) instanceof SubA, "A.aspectOf(subc2) instanceof SubA");
// retrieving the SubA aspect using its own aspectOf method
//Tester.check(SubA.aspectOf(subc2) instanceof SubA, "SubA.aspectOf(subc2) instanceof SubA");
try {
// trying to retrieve a SubA aspect where only an A aspect is present
SubA subA = SubA.aspectOf(c);
Tester.checkFailed("SubA.aspectOf(c) should throw an exception");
} catch (NoAspectException nae) {
Tester.note("NoAspectException caught");
}
Tester.check("NoAspectException caught");
}
}
class C {
// records what methods are called and advice are run
public StringBuffer history = new StringBuffer();
public void m() {
history.append("C.m, ");
}
}
class SubC1 extends C {
public void m() {
history.append("SubC1.m, ");
super.m();
}
}
class SubC2 extends C {
}
abstract aspect A {
//StringBuffer history = null;
after (Object object) returning (): instanceof(object) && receptions(new(..)) {
//history = c.history;
System.out.println("created a: " + object + " on a " + this);
}
abstract pointcut targets();
before (): targets() {
System.out.println("A.before, ");
}
}
aspect SubA extends A of eachobject(instanceof(C)) {
pointcut targets(): receptions(void m());
}
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