1 /* 2 * Copyright (c) 2018, 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 /* @test 25 * @bug 8188240 26 * @summary This is a test to ensure that proxies do not try to intercept interface static methods. 27 * 28 * @build ProxyClashTest 29 * @run main ProxyClashTest 30 */ 31 32 import java.lang.reflect.Method; 33 import java.lang.reflect.Proxy; 34 import java.util.Observer; 35 36 public class ProxyClashTest { 37 38 public interface ClashWithRunnable { run()39 static int run() { return 123; } 40 foo()41 static void foo() {} 42 } 43 main(String[] args)44 public static void main(String[] args) { 45 System.err.println( 46 "\nDynamic proxy API static method clash test\n"); 47 48 Class<?>[] interfaces = 49 new Class<?>[] { ClashWithRunnable.class, Runnable.class, Observer.class }; 50 51 ClassLoader loader = ProxyClashTest.class.getClassLoader(); 52 53 /* 54 * Generate a proxy class. 55 */ 56 Class<?> proxyClass = Proxy.getProxyClass(loader, interfaces); 57 System.err.println("+ generated proxy class: " + proxyClass); 58 59 for (Method method : proxyClass.getDeclaredMethods()) { 60 if (method.getName().equals("run") && method.getReturnType() == int.class) { 61 throw new RuntimeException("proxy intercept a static method"); 62 } 63 if (method.getName().equals("foo")) { 64 throw new RuntimeException("proxy intercept a static method"); 65 } 66 } 67 68 System.err.println("\nTEST PASSED"); 69 } 70 } 71