1 /*
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23 
24 /*
25  * @test
26  * @bug     8047795 8053938
27  * @summary Ensure that replaceAll operator cannot add bad elements
28  * @author  Mike Duigou
29  * @library /test/lib
30  */
31 
32 import jdk.test.lib.valueclass.VClass;
33 import java.util.*;
34 import java.util.function.UnaryOperator;
35 
36 public class CheckedListReplaceAll {
37 
38     public static void main(String[] args) {
39         List unwrapped = Arrays.asList(new Object[]{1, 2, 3});
40         List<Object> wrapped = Collections.checkedList(unwrapped, Integer.class);
41 
42         UnaryOperator evil = e -> (((int) e) % 2 != 0) ? e : "evil";
43 
44         try {
45             wrapped.replaceAll(evil);
46             System.out.printf("Bwahaha! I have defeated you! %s\n", wrapped);
47             throw new RuntimeException("String added to checked List<Integer>");
48         } catch (ClassCastException thwarted) {
49             thwarted.printStackTrace(System.out);
50             System.out.println("Curses! Foiled again!");
51         }
52 
53         unwrapped = Arrays.asList(new Object[]{});  // Empty list
54         wrapped = Collections.checkedList(unwrapped, Integer.class);
55         try {
56             wrapped.replaceAll((UnaryOperator)null);
57             System.out.printf("Bwahaha! I have defeated you! %s\n", wrapped);
58             throw new RuntimeException("NPE not thrown when passed a null operator");
59         } catch (NullPointerException thwarted) {
60             thwarted.printStackTrace(System.out);
61             System.out.println("Curses! Foiled again!");
62         }
63 
64         List<VClass> vList = Collections.checkedList(new ArrayList<VClass>(Arrays.asList(new VClass(1, new int[] { 1 }))), VClass.class);
65         vList.replaceAll(v -> new VClass(v.x + 1, new int[] { v.x + 1 }));
66         if (!vList.get(0).equals(new VClass(2, new int[] { 2 })))
67             throw new RuntimeException("value checkedList replaceAll failed");
68 
69         List raw = Collections.checkedList(new ArrayList<VClass>(Arrays.asList(new VClass(1, new int[] { 1 }))), VClass.class);
70         try {
71             raw.replaceAll(e -> "not a Tuple");
72             throw new RuntimeException("value checkedList replaceAll accepted wrong type");
73         } catch (ClassCastException expected) { }
74     }
75 }
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