94 lines
4.5 KiB
Java
94 lines
4.5 KiB
Java
/*
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* Copyright (c) 2023, 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 8302260
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* @build p.C p.D p.I p.q.Q
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* @run junit DescribeConstableTest
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* @summary Test VarHandle::describeConstable on static fields
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*/
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import java.lang.constant.ClassDesc;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodHandles.Lookup;
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import java.lang.invoke.VarHandle;
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import java.lang.invoke.VarHandle.VarHandleDesc;
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import java.util.stream.Stream;
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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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import org.junit.jupiter.params.provider.Arguments;
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import static org.junit.jupiter.api.Assertions.*;
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public class DescribeConstableTest {
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private static final Lookup LOOKUP = MethodHandles.lookup();
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private static Stream<Arguments> testCases() {
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return Stream.of(
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// static field defined in p.C only
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Arguments.of(p.C.class, "cString", String.class, p.C.class, "CClass"),
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// static fields defined in both superinterface p.I and superclass p.q.Q
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// resolved to the one defined in the direct superinterface of C
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Arguments.of(p.C.class, "stringField", String.class, p.I.class, "I"),
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Arguments.of(p.C.class, "longField", long.class, p.I.class, 10L),
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// static fields defined in superclass p.q.Q only
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Arguments.of(p.C.class, "stringField2", String.class, p.q.Q.class, "QClass2"),
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Arguments.of(p.C.class, "longField2", long.class, p.q.Q.class, 102L),
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// static fields defined in superinterface p.I only
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Arguments.of(p.C.class, "stringField3", String.class, p.I.class, "I3"),
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Arguments.of(p.C.class, "longField3", long.class, p.I.class, 13L),
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// static fields defined in p.D only
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Arguments.of(p.D.class, "dString", String.class, p.D.class, "DClass"),
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Arguments.of(p.D.class, "dLong", long.class, p.D.class, 1L),
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// static fields defined in both superinterface p.I and superclass p.q.Q
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// resolved to the one defined in the direct superinterface of D
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Arguments.of(p.D.class, "stringField", String.class, p.I.class, "I"),
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Arguments.of(p.D.class, "longField", long.class, p.I.class, 10L)
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);
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}
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@ParameterizedTest
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@MethodSource("testCases")
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void test(Class<?> refc, String name, Class<?> type, Class<?> declaringClass, Object value) throws Throwable {
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var vh = LOOKUP.findStaticVarHandle(refc, name, type);
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assertEquals(value, vh.get());
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var refcDesc = refc.describeConstable().orElseThrow();
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var typeDesc = type.describeConstable().orElseThrow();
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var vhd = vh.describeConstable().orElseThrow();
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var vhd2 = VarHandleDesc.ofStaticField(refcDesc, name, typeDesc);
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assertEquals(value, vhd.resolveConstantDesc(LOOKUP).get());
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assertEquals(value, vhd2.resolveConstantDesc(LOOKUP).get());
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assertEquals(vhd.toString(), varHandleDescString(declaringClass, name, type, true));
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}
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static String varHandleDescString(Class<?> declaringClass, String name, Class<?> type, boolean staticField) {
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return String.format("VarHandleDesc[%s%s.%s:%s]",
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staticField ? "static " : "",
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declaringClass.describeConstable().orElseThrow().displayName(), name,
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type.describeConstable().orElseThrow().displayName());
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}
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}
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