59 lines
2.0 KiB
Java
59 lines
2.0 KiB
Java
/*
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* Copyright (c) 2022, 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.Proxy;
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import org.testng.Assert;
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import org.testng.annotations.Test;
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/*
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* @test
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* @bug 8285401
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* @summary Avoid initialization of parameter types in proxy construction
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* @run testng LazyInitializationTest
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*/
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public final class LazyInitializationTest {
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private static volatile boolean initialized = false;
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interface Intf {
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void m(Parameter parameter);
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}
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static class Parameter {
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static {
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initialized = true;
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}
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}
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@Test
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public void testLazyInitialization() {
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Intf value = (Intf) Proxy.newProxyInstance(LazyInitializationTest.class.getClassLoader(),
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new Class<?>[]{ Intf.class },
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(proxy, method, args) -> null);
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Assert.assertFalse(initialized, "parameter type initialized unnecessarily");
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value.m(new Parameter());
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Assert.assertTrue(initialized, "parameter type initialized after instantiation");
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}
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}
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