--- /dev/null Tue Feb 25 00:08:03 2014 +++ new/test/java/lang/annotation/AnnotationType/AnnotationTypeRuntimeAssumptionTest.java Tue Feb 25 00:08:01 2014 @@ -0,0 +1,187 @@ +/* + * Copyright (c) 2013, 2014, 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 7122142 + * @summary Test consistent parsing of ex-RUNTIME annotations that + * were changed and separately compiled to have CLASS retention + */ + +import sun.misc.IOUtils; + +import java.io.IOException; +import java.io.InputStream; +import java.lang.annotation.Annotation; +import java.lang.annotation.Retention; +import java.lang.annotation.RetentionPolicy; + +import static java.lang.annotation.RetentionPolicy.CLASS; +import static java.lang.annotation.RetentionPolicy.RUNTIME; + +/** + * This test simulates a situation where there are two mutually recursive + * {@link RetentionPolicy#RUNTIME RUNTIME} annotations {@link AnnA_v1 AnnA_v1} + * and {@link AnnB AnnB} and then the first is changed to have + * {@link RetentionPolicy#CLASS CLASS} retention and separately compiled. + * When {@link AnnA_v1 AnnA_v1} annotation is looked-up on {@link AnnB AnnB} + * it still appears to have {@link RetentionPolicy#RUNTIME RUNTIME} retention. + */ +public class AnnotationTypeRuntimeAssumptionTest { + + @Retention(RUNTIME) + @AnnB + public @interface AnnA_v1 { + } + + // An alternative version of AnnA_v1 with CLASS retention instead. + // Used to simulate separate compilation (see AltClassLoader below). + @Retention(CLASS) + @AnnB + public @interface AnnA_v2 { + } + + @Retention(RUNTIME) + @AnnA_v1 + public @interface AnnB { + } + + @AnnA_v1 + public static class TestTask implements Runnable { + @Override + public void run() { + AnnA_v1 ann1 = getDeclaredAnnotation(TestTask.class, AnnA_v1.class); + if (ann1 != null) { + throw new IllegalStateException( + "@" + ann1.annotationType().getSimpleName() + + " found on: " + TestTask.class.getName() + + " should not be visible at runtime"); + } + AnnA_v1 ann2 = getDeclaredAnnotation(AnnB.class, AnnA_v1.class); + if (ann2 != null) { + throw new IllegalStateException( + "@" + ann2.annotationType().getSimpleName() + + " found on: " + AnnB.class.getName() + + " should not be visible at runtime"); + } + } + + private static A getDeclaredAnnotation(Class clazz, Class annotationClass) { + for (Annotation ann : clazz.getDeclaredAnnotations()) { + if (ann.annotationType() == annotationClass) { + return annotationClass.cast(ann); + } + } + return null; + } + } + + public static void main(String[] args) throws Exception { + ClassLoader altLoader = new AltClassLoader( + AnnotationTypeRuntimeAssumptionTest.class.getClassLoader()); + + Runnable altTask = (Runnable) Class.forName( + TestTask.class.getName(), + true, + altLoader).newInstance(); + + altTask.run(); + } + + /** + * A ClassLoader implementation that loads alternative implementations of + * classes. If class name ends with "_v1" it locates instead a class with + * name ending with "_v2" and loads that class instead. + */ + static class AltClassLoader extends ClassLoader { + AltClassLoader(ClassLoader parent) { + super(parent); + } + + @Override + protected Class loadClass(String name, boolean resolve) + throws ClassNotFoundException { + if (name.indexOf('.') < 0) { // root package is our class + synchronized (getClassLoadingLock(name)) { + // First, check if the class has already been loaded + Class c = findLoadedClass(name); + if (c == null) { + c = findClass(name); + } + if (resolve) { + resolveClass(c); + } + return c; + } + } + else { // not our class + return super.loadClass(name, resolve); + } + } + + @Override + protected Class findClass(String name) + throws ClassNotFoundException { + // special class name -> replace it with alternative name + if (name.endsWith("_v1")) { + String altName = name.substring(0, name.length() - 3) + "_v2"; + String altPath = altName.replace('.', '/').concat(".class"); + try (InputStream is = getResourceAsStream(altPath)) { + if (is != null) { + byte[] bytes = IOUtils.readFully(is, -1, true); + // patch class bytes to contain original name + for (int i = 0; i < bytes.length - 2; i++) { + if (bytes[i] == '_' && + bytes[i + 1] == 'v' && + bytes[i + 2] == '2') { + bytes[i + 2] = '1'; + } + } + return defineClass(name, bytes, 0, bytes.length); + } + else { + throw new ClassNotFoundException(name); + } + } + catch (IOException e) { + throw new ClassNotFoundException(name, e); + } + } + else { // not special class name -> just load the class + String path = name.replace('.', '/').concat(".class"); + try (InputStream is = getResourceAsStream(path)) { + if (is != null) { + byte[] bytes = IOUtils.readFully(is, -1, true); + return defineClass(name, bytes, 0, bytes.length); + } + else { + throw new ClassNotFoundException(name); + } + } + catch (IOException e) { + throw new ClassNotFoundException(name, e); + } + } + } + } +}