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aspect SwitchPatternPreview2Aspect {
Object around(Integer i): execution(* doSomethingWithInteger(*)) && args(i) {
System.out.println(
switch (i) {
case null -> "value unavailable: " + i;
case -1, 1 -> "absolute value 1: " + i;
case Integer value && value > 0 -> "positive integer: " + i;
default -> "other integer: " + i;
}
);
return proceed(i);
}
}
class Application {
public static void main(String[] args) {
doSomethingWithInteger(-1);
doSomethingWithInteger(0);
doSomethingWithInteger(42);
doSomethingWithInteger(-99);
doSomethingWithInteger(Integer.valueOf(123));
doSomethingWithInteger(null);
}
public static Object doSomethingWithInteger(Integer o) { return o; }
}
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