russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
114 lines
4.3 KiB
Java
114 lines
4.3 KiB
Java
/*
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* Copyright (c) 2020, 2026, 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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/*
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* @test
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* @bug 8022795
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* @run junit TestVarArgs
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* @summary Verify if a method defined in a proxy interface has ACC_VARARGS set
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*/
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodType;
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import java.lang.reflect.InvocationHandler;
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import java.lang.reflect.Method;
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import java.lang.reflect.Proxy;
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import static org.junit.jupiter.api.Assertions.*;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.MethodSource;
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public class TestVarArgs {
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interface I {
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Object call(Object... values);
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}
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interface J {
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Object call(Object[] values);
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}
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public static Object[][] proxyInterfaces() {
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return new Object[][] {
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{ new Class<?>[] { I.class }, true},
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{ new Class<?>[] { J.class }, false},
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{ new Class<?>[] { I.class, J.class }, true},
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{ new Class<?>[] { J.class, I.class }, false},
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};
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}
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@ParameterizedTest
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@MethodSource("proxyInterfaces")
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public void testMethod(Class<?>[] proxyInterfaces, boolean isVarArgs) throws Throwable {
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// check if the first proxy interface with the method named "call" declares var result
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Method m = proxyInterfaces[0].getMethod("call", Object[].class);
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assertEquals(isVarArgs, m.isVarArgs());
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// the method in the generated proxy class should match the method
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// declared in the proxy interface
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Object proxy = Proxy.newProxyInstance(TestVarArgs.class.getClassLoader(),
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proxyInterfaces, IH);
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Class<?> proxyClass = proxy.getClass();
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assertTrue(Proxy.isProxyClass(proxyClass));
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Method method = proxyClass.getMethod("call", Object[].class);
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assertEquals(isVarArgs, method.isVarArgs());
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Object[] params = new Object[] { "foo", "bar", "goo" };
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Object[] result;
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// test reflection
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result = (Object[]) method.invoke(proxy, new Object[] {params});
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assertEquals(params, result);
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// test method handle
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MethodHandle mh = MethodHandles.lookup().findVirtual(proxyClass, "call",
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MethodType.methodType(Object.class, Object[].class));
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assertEquals(isVarArgs, mh.isVarargsCollector());
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MethodHandle mhVarArity = mh;
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MethodHandle mhFixedArity = mh;
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if (isVarArgs) {
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mhFixedArity = mh.asFixedArity();
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} else {
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mhVarArity = mh.asVarargsCollector(Object[].class);
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}
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result = (Object[]) mhVarArity.invoke(proxy, "foo", "bar", "goo");
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assertArrayEquals(params, result);
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result = (Object[]) mhFixedArity.invoke(proxy, params);
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assertArrayEquals(params, result);
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if (!isVarArgs) {
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MethodType mt = MethodType.methodType(Object.class, Object.class, String.class, String.class, String.class);
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mh = mh.asVarargsCollector(Object[].class).asType(mt);
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}
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result = (Object[]) mh.invoke(proxy, "foo", "bar", "goo");
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assertArrayEquals(params, result);
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}
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private static final InvocationHandler IH = new InvocationHandler() {
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@Override
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public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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return args[0];
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}
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};
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}
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