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/*
* Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8350704
* @summary Test behaviors with malformed annotations (in class files)
* @library /test/lib
* @run junit MalformedAnnotationTest
*/
import jdk.test.lib.ByteCodeLoader;
import org.junit.jupiter.api.Test;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.classfile.Annotation;
import java.lang.classfile.AnnotationElement;
import java.lang.classfile.AnnotationValue;
import java.lang.classfile.ClassFile;
import java.lang.classfile.attribute.RuntimeVisibleAnnotationsAttribute;
import java.lang.constant.ClassDesc;
import java.lang.reflect.GenericSignatureFormatError;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
class MalformedAnnotationTest {
/**
* An annotation that has elements of the Class type.
* Useful for checking behavior when the string is not a descriptor string.
*/
@Retention(RetentionPolicy.RUNTIME)
@interface ClassCarrier {
Class<?> value();
}
/**
* Ensures bad class descriptors in annotations lead to
* {@link GenericSignatureFormatError} and the error message contains the
* malformed descriptor string.
*/
@Test
void testMalformedClassValue() throws Exception {
var badDescString = "Not a_descriptor";
var bytes = ClassFile.of().build(ClassDesc.of("Test"), clb -> clb
.with(RuntimeVisibleAnnotationsAttribute.of(
Annotation.of(ClassCarrier.class.describeConstable().orElseThrow(),
AnnotationElement.of("value", AnnotationValue.ofClass(clb
.constantPool().utf8Entry(badDescString))))
)));
var cl = new ByteCodeLoader("Test", bytes, MalformedAnnotationTest.class.getClassLoader()).loadClass("Test");
var ex = assertThrows(GenericSignatureFormatError.class, () -> cl.getDeclaredAnnotation(ClassCarrier.class));
assertTrue(ex.getMessage().contains(badDescString), () -> "Uninformative error: " + ex);
}
}
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