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.
101 lines
4.2 KiB
Java
101 lines
4.2 KiB
Java
/*
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* Copyright (c) 2025, 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 8371953 8371960
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* @summary Null checks for AnnotatedElement APIs.
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* @run junit AnnotatedElementNullCheckTest
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*/
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import java.lang.reflect.AnnotatedArrayType;
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import java.lang.reflect.AnnotatedElement;
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import java.lang.reflect.AnnotatedParameterizedType;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Optional;
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import java.util.function.Consumer;
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import org.junit.jupiter.api.Test;
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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 static org.junit.jupiter.api.Assertions.assertThrows;
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import static org.junit.jupiter.api.Assertions.fail;
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class AnnotatedElementNullCheckTest {
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// Return a stream of instances, each of a different implementation class
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static AnnotatedElement[] implementations() throws Exception {
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var objectHashCodeMethod = Object.class.getMethod("hashCode");
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var annotatedParameterizedType = (AnnotatedParameterizedType) Optional.class
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.getMethod("ifPresent", Consumer.class)
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.getAnnotatedParameterTypes()[0];
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var annotatedGenericArrayType = (AnnotatedArrayType) List.class
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.getMethod("of", Object[].class)
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.getAnnotatedParameterTypes()[0];
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record Rec(int a) {}
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return new AnnotatedElement[] {
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Object.class,
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objectHashCodeMethod,
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System.class.getField("out"),
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Object.class.getConstructor(),
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Object.class.getPackage(),
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Optional.class.getTypeParameters()[0],
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// AnnotatedType (direct)
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objectHashCodeMethod.getAnnotatedReturnType(),
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// AnnotatedParameterizedType
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annotatedParameterizedType,
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// AnnotatedArrayType
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annotatedGenericArrayType,
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// AnnotatedTypeVariable
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annotatedGenericArrayType.getAnnotatedGenericComponentType(),
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// AnnotatedWildcardType
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annotatedParameterizedType.getAnnotatedActualTypeArguments()[0],
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Rec.class.getRecordComponents()[0],
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Object.class.getMethod("equals", Object.class).getParameters()[0],
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Object.class.getModule(),
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};
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}
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@Test
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void ensureImplementationsDistinct() throws Throwable {
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var set = new HashSet<Class<?>>();
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for (var impl : implementations()) {
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var clazz = impl.getClass();
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if (!set.add(clazz)) {
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fail("Duplicate implementation class %s in %s".formatted(clazz, impl));
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}
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}
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}
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@ParameterizedTest
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@MethodSource("implementations")
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void nullChecks(AnnotatedElement impl) {
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assertThrows(NullPointerException.class, () -> impl.isAnnotationPresent(null));
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assertThrows(NullPointerException.class, () -> impl.getAnnotation(null));
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assertThrows(NullPointerException.class, () -> impl.getAnnotationsByType(null));
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assertThrows(NullPointerException.class, () -> impl.getDeclaredAnnotation(null));
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assertThrows(NullPointerException.class, () -> impl.getDeclaredAnnotationsByType(null));
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}
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}
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