130 lines
5.3 KiB
Java
130 lines
5.3 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.lang.reflect.*;
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import java.util.Arrays;
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import java.util.stream.Collectors;
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import org.testng.annotations.DataProvider;
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import org.testng.annotations.Test;
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import static org.testng.Assert.*;
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/*
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* @test
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* @bug 8159746
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* @summary Test invoking a default method in a non-public proxy interface
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* @build p.Foo p.Bar p.ProxyMaker
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* @run testng DefaultMethodProxy
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*/
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public class DefaultMethodProxy {
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public interface I {
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default String m() { return "I"; }
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}
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@Test
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public static void publicInterface() throws ReflectiveOperationException {
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// create a proxy instance of a public proxy interface should succeed
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Proxy proxy = (Proxy)Proxy.newProxyInstance(DefaultMethodProxy.class.getClassLoader(),
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new Class<?>[] { I.class }, IH);
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testDefaultMethod(proxy, "I");
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// can get the invocation handler
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assertTrue(Proxy.getInvocationHandler(proxy) == IH);
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}
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@DataProvider(name = "nonPublicIntfs")
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private static Object[][] nonPublicIntfs() throws ClassNotFoundException {
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Class<?> fooClass = Class.forName("p.Foo");
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Class<?> barClass = Class.forName("p.Bar");
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return new Object[][]{
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new Object[]{new Class<?>[]{ fooClass }, "foo"},
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new Object[]{new Class<?>[]{ barClass, fooClass }, "bar"},
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new Object[]{new Class<?>[]{ barClass }, "bar"},
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};
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}
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@Test(dataProvider = "nonPublicIntfs")
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public static void hasPackageAccess(Class<?>[] intfs, String expected) throws ReflectiveOperationException {
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Proxy proxy = (Proxy)Proxy.newProxyInstance(DefaultMethodProxy.class.getClassLoader(), intfs, IH);
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testDefaultMethod(proxy, expected);
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// proxy instance is created successfully even invocation handler has no access
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Proxy.newProxyInstance(DefaultMethodProxy.class.getClassLoader(), intfs, IH_NO_ACCESS);
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}
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// IAE thrown at invocation time
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@Test(dataProvider = "nonPublicIntfs", expectedExceptions = {IllegalAccessException.class})
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public static void noPackageAccess(Class<?>[] intfs, String ignored) throws Throwable {
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Proxy proxy = (Proxy)Proxy.newProxyInstance(DefaultMethodProxy.class.getClassLoader(), intfs, IH_NO_ACCESS);
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try {
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testDefaultMethod(proxy, "dummy");
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} catch (InvocationTargetException e) {
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// unwrap the exception
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if (e.getCause() instanceof UndeclaredThrowableException) {
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Throwable cause = e.getCause();
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throw cause.getCause();
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}
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throw e;
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}
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}
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/*
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* Verify if a default method "m" can be invoked successfully
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*/
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static void testDefaultMethod(Proxy proxy, String expected) throws ReflectiveOperationException {
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Method m = proxy.getClass().getDeclaredMethod("m");
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m.setAccessible(true);
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String name = (String) m.invoke(proxy);
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if (!expected.equals(name)) {
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throw new RuntimeException("return value: " + name + " expected: " + expected);
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}
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}
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// invocation handler with access to the non-public interface in package p
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private static final InvocationHandler IH = (proxy, method, params) -> {
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System.out.format("Proxy for %s: invoking %s%n",
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Arrays.stream(proxy.getClass().getInterfaces())
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.map(Class::getName)
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.collect(Collectors.joining(", ")), method.getName());
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if (method.isDefault()) {
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return p.ProxyMaker.invoke(proxy, method, params);
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}
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throw new UnsupportedOperationException(method.toString());
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};
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// invocation handler with no access to the non-public interface in package p
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// expect IllegalAccessException thrown
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private static final InvocationHandler IH_NO_ACCESS = (proxy, method, params) -> {
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System.out.format("Proxy for %s: invoking %s%n",
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Arrays.stream(proxy.getClass().getInterfaces())
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.map(Class::getName)
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.collect(Collectors.joining(", ")), method.getName());
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if (method.isDefault()) {
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InvocationHandler.invokeDefault(proxy, method, params);
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}
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throw new UnsupportedOperationException(method.toString());
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};
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}
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