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/*
* Copyright (c) 2016, 2020, 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.
*/
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.module.Configuration;
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleFinder;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import jdk.internal.module.ModuleInfoWriter;
import jdk.internal.org.objectweb.asm.AnnotationVisitor;
import jdk.internal.org.objectweb.asm.Attribute;
import jdk.internal.org.objectweb.asm.ClassReader;
import jdk.internal.org.objectweb.asm.ClassVisitor;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.Opcodes;
import jdk.internal.org.objectweb.asm.commons.ModuleTargetAttribute;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
/**
* @test
* @modules java.base/jdk.internal.org.objectweb.asm
* java.base/jdk.internal.org.objectweb.asm.commons
* java.base/jdk.internal.module
* @run testng AnnotationsTest
* @summary Basic test of annotations on modules
*/
public class AnnotationsTest {
/**
* Test that there are no annotations on an unnamed module.
*/
@Test
public void testUnnamedModule() {
Module module = this.getClass().getModule();
assertTrue(module.getAnnotations().length == 0);
assertTrue(module.getDeclaredAnnotations().length == 0);
}
/**
* Test reflectively reading the annotations on a named module.
*/
@Test
public void testNamedModule() throws IOException {
Path mods = Files.createTempDirectory(Path.of(""), "mods");
// @Deprecated(since="9", forRemoval=true) module foo { }
ModuleDescriptor descriptor = ModuleDescriptor.newModule("foo").build();
byte[] classBytes = ModuleInfoWriter.toBytes(descriptor);
classBytes = addDeprecated(classBytes, true, "9");
Files.write(mods.resolve("module-info.class"), classBytes);
// create module layer with module foo
Module module = loadModule(mods, "foo");
// check the annotation is present
assertTrue(module.isAnnotationPresent(Deprecated.class));
Deprecated d = module.getAnnotation(Deprecated.class);
assertNotNull(d, "@Deprecated not found");
assertTrue(d.forRemoval());
assertEquals(d.since(), "9");
Annotation[] a = module.getAnnotations();
assertTrue(a.length == 1);
assertTrue(a[0] instanceof Deprecated);
assertEquals(module.getDeclaredAnnotations(), a);
}
/**
* Test reflectively reading annotations on a named module where the module
* is mapped to a class loader that can locate a module-info.class.
*/
@Test
public void testWithModuleInfoResourceXXXX() throws IOException {
Path mods = Files.createTempDirectory(Path.of(""), "mods");
// classes directory with module-info.class
Path classes = Files.createTempDirectory(Path.of("."), "classes");
Path mi = classes.resolve("module-info.class");
try (OutputStream out = Files.newOutputStream(mi)) {
ModuleDescriptor descriptor = ModuleDescriptor.newModule("lurker").build();
ModuleInfoWriter.write(descriptor, out);
}
// URLClassLoader that can locate a module-info.class resource
URL url = classes.toUri().toURL();
URLClassLoader loader = new URLClassLoader(new URL[] { url });
assertTrue(loader.findResource("module-info.class") != null);
// module foo { }
ModuleDescriptor descriptor = ModuleDescriptor.newModule("foo").build();
byte[] classBytes = ModuleInfoWriter.toBytes(descriptor);
Files.write(mods.resolve("module-info.class"), classBytes);
// create module layer with module foo
Module foo = loadModule(mods, "foo", loader);
// check the annotation is not present
assertFalse(foo.isAnnotationPresent(Deprecated.class));
// @Deprecated(since="11", forRemoval=true) module bar { }
descriptor = ModuleDescriptor.newModule("bar").build();
classBytes = ModuleInfoWriter.toBytes(descriptor);
classBytes = addDeprecated(classBytes, true, "11");
Files.write(mods.resolve("module-info.class"), classBytes);
// create module layer with module bar
Module bar = loadModule(mods, "bar", loader);
// check the annotation is present
assertTrue(bar.isAnnotationPresent(Deprecated.class));
}
/**
* Adds the Deprecated annotation to the given module-info class file.
*/
static byte[] addDeprecated(byte[] bytes, boolean forRemoval, String since) {
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
+ ClassWriter.COMPUTE_FRAMES);
ClassVisitor cv = new ClassVisitor(Opcodes.ASM6, cw) { };
ClassReader cr = new ClassReader(bytes);
List<Attribute> attrs = new ArrayList<>();
attrs.add(new ModuleTargetAttribute());
cr.accept(cv, attrs.toArray(new Attribute[0]), 0);
AnnotationVisitor annotationVisitor
= cv.visitAnnotation("Ljava/lang/Deprecated;", true);
annotationVisitor.visit("forRemoval", forRemoval);
annotationVisitor.visit("since", since);
annotationVisitor.visitEnd();
return cw.toByteArray();
}
/**
* Load the module of the given name in the given directory into a
* child layer with the given class loader as the parent class loader.
*/
static Module loadModule(Path dir, String name, ClassLoader parent)
throws IOException
{
ModuleFinder finder = ModuleFinder.of(dir);
ModuleLayer bootLayer = ModuleLayer.boot();
Configuration cf = bootLayer.configuration()
.resolve(finder, ModuleFinder.of(), Set.of(name));
ModuleLayer layer = bootLayer.defineModulesWithOneLoader(cf, parent);
Module module = layer.findModule(name).orElse(null);
assertNotNull(module, name + " not loaded");
return module;
}
static Module loadModule(Path dir, String name) throws IOException {
return loadModule(dir, name, ClassLoader.getSystemClassLoader());
}
}
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