87 lines
3.0 KiB
Java
87 lines
3.0 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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/*
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* This file is copied from open/test/jdk/java/lang/invoke/lambda.
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* It is being used as the main class for the appcds/LambdaEagerInit.java test.
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*/
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import java.lang.reflect.Field;
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import java.lang.reflect.Modifier;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.stream.Collectors;
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import static jdk.test.lib.Asserts.*;
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public class LambdaEagerInitTest {
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interface H {Object m(String s);}
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private static Set<String> allowedStaticFields(boolean nonCapturing) {
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Set<String> s = new HashSet<>();
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if (Boolean.getBoolean("jdk.internal.lambda.disableEagerInitialization")) {
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if (nonCapturing) s.add("LAMBDA_INSTANCE$");
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}
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return s;
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}
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private void nonCapturingLambda() {
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H la = s -> s;
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assertEquals("hi", la.m("hi"));
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Class<? extends H> c1 = la.getClass();
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verifyLambdaClass(la.getClass(), true);
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}
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private void capturingLambda() {
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H la = s -> concat(s, "foo");
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assertEquals("hi foo", la.m("hi"));
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verifyLambdaClass(la.getClass(), false);
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}
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private void verifyLambdaClass(Class<?> c, boolean nonCapturing) {
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Set<String> staticFields = new HashSet<>();
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Set<String> instanceFields = new HashSet<>();
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for (Field f : c.getDeclaredFields()) {
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if (Modifier.isStatic(f.getModifiers())) {
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staticFields.add(f.getName());
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} else {
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instanceFields.add(f.getName());
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}
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}
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assertEquals(instanceFields.size(), nonCapturing ? 0 : 1, "Unexpected instance fields");
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assertEquals(staticFields, allowedStaticFields(nonCapturing), "Unexpected static fields");
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}
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private String concat(String... ss) {
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return Arrays.stream(ss).collect(Collectors.joining(" "));
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}
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public static void main(String[] args) {
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LambdaEagerInitTest test = new LambdaEagerInitTest();
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test.nonCapturingLambda();
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test.capturingLambda();
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}
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}
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