1 /*
  2  * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
  3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  4  *
  5  * This code is free software; you can redistribute it and/or modify it
  6  * under the terms of the GNU General Public License version 2 only, as
  7  * published by the Free Software Foundation.
  8  *
  9  * This code is distributed in the hope that it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 12  * version 2 for more details (a copy is included in the LICENSE file that
 13  * accompanied this code).
 14  *
 15  * You should have received a copy of the GNU General Public License version
 16  * 2 along with this work; if not, write to the Free Software Foundation,
 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  */
 23 
 24 /*
 25  * @test
 26  * @summary Test dynamic proxies with parameter types or return type of value class
 27  * @enablePreview
 28  * @run testng/othervm ProxyTest
 29  */
 30 
 31 import java.lang.reflect.*;
 32 import java.util.Arrays;
 33 
 34 import jdk.internal.vm.annotation.ImplicitlyConstructible;
 35 import org.testng.annotations.Test;
 36 import static org.testng.Assert.*;
 37 
 38 public class ProxyTest {
 39     static value class V {
 40         int v;
 41         V(int v) {
 42             this.v = v;
 43         }
 44     }
 45 
 46     @ImplicitlyConstructible
 47     static value class P {
 48         int p;
 49         P(int p) {
 50             this.p = p;
 51         }
 52     }
 53 
 54     interface I {
 55         int getV(V v);
 56         int getP(P p);
 57     }
 58 
 59     interface J {
 60         int[] getV(V[] v);
 61     }
 62 
 63     @Test
 64     public void testProxy() throws Exception {
 65         InvocationHandler handler = new InvocationHandler() {
 66             @Override
 67             public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
 68                 switch (method.getName()) {
 69                     case "getV":
 70                         V v = (V)args[0];
 71                         return v.v;
 72                     case "getP":
 73                         P p = (P)args[0];
 74                         return p.p;
 75                     default:
 76                         throw new UnsupportedOperationException(method.toString());
 77                 }
 78             }
 79         };
 80 
 81         Class<?>[] intfs = new Class<?>[] { I.class };
 82         I i = (I) Proxy.newProxyInstance(ProxyTest.class.getClassLoader(), intfs, handler);
 83 
 84         assertTrue(i.getV(new V(100)) == 100);
 85         assertTrue(i.getP(new P(200)) == 200);
 86     }
 87 
 88     @Test
 89     public void testValueArrayType() {
 90         InvocationHandler handler = new InvocationHandler() {
 91             @Override
 92             public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
 93                 switch (method.getName()) {
 94                     case "getV":
 95                         V[] vs = (V[])args[0];
 96                         return Arrays.stream(vs).mapToInt(v -> v.v).toArray();
 97                     default:
 98                         throw new UnsupportedOperationException(method.toString());
 99                 }
100             }
101         };
102 
103         Class<?>[] intfs = new Class<?>[] { J.class };
104         J j = (J) Proxy.newProxyInstance(ProxyTest.class.getClassLoader(), intfs, handler);
105 
106         V[] array = new V[] { new V(10), new V(20), new V(30)};
107         assertEquals(j.getV(array), new int[] { 10, 20, 30});
108     }
109 }