1 class GenericMethodArguments { 2 3 static class Items<T> { 4 public <Output extends T> Output apply(Transform<? super Items<T>, Output> t) { 5 return null; 6 } 7 } 8 9 static class Transforms { 10 public static <I, O> Transform<I, O> of(DoFn<I, O> fn) { 11 return null; 12 } 13 } 14 15 static class Transform<Input, Output> {} 16 17 static class DoFn<Input, Output> {} 18 19 static class MyFn1<T> extends DoFn<T, Long> {} 20 21 static class MyFn2 extends MyFn1<Integer> {} 22 23 private Items<Integer> items; 24 25 public void useCase1() { 26 items.apply(Transforms.of(new MyFn2())); 27 } 28 29 public void useCase2() { 30 items.apply(Transforms.of(new DoFn<Integer,Long>(){})); 31 } 32 33 } 34
