1 /*
   2  * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.io.IOException;
  25 import java.io.InputStream;
  26 import java.lang.annotation.Annotation;
  27 import java.lang.module.Configuration;
  28 import java.lang.module.ModuleFinder;
  29 import java.nio.file.Files;
  30 import java.nio.file.Path;

  31 
  32 import java.util.ArrayList;
  33 import java.util.List;
  34 import java.util.Set;
  35 
  36 import jdk.internal.module.ClassFileAttributes;
  37 import jdk.internal.org.objectweb.asm.AnnotationVisitor;
  38 import jdk.internal.org.objectweb.asm.Attribute;
  39 import jdk.internal.org.objectweb.asm.ClassReader;
  40 import jdk.internal.org.objectweb.asm.ClassVisitor;
  41 import jdk.internal.org.objectweb.asm.ClassWriter;
  42 import jdk.internal.org.objectweb.asm.Opcodes;
  43 
  44 import org.testng.annotations.Test;
  45 import static org.testng.Assert.*;
  46 
  47 /**
  48  * @test
  49  * @modules java.base/jdk.internal.org.objectweb.asm
  50  *          java.base/jdk.internal.module
  51  *          java.xml
  52  * @run testng AnnotationsTest
  53  * @summary Basic test of annotations on modules
  54  */
  55 
  56 public class AnnotationsTest {
  57 
  58     /**
  59      * Test that there are no annotations on an unnamed module.
  60      */
  61     @Test
  62     public void testUnnamedModule() {
  63         Module module = this.getClass().getModule();
  64         assertTrue(module.getAnnotations().length == 0);
  65         assertTrue(module.getDeclaredAnnotations().length == 0);
  66     }
  67 
  68     /**
  69      * Test loading a module with a RuntimeVisibleAnnotation attribute.
  70      * The test copies the module-info.class for java.xml, adds the attribute,
  71      * and then loads the updated module.
  72      */
  73     @Test
  74     public void testNamedModule() throws IOException {
  75 
  76         // "deprecate" java.xml
  77         Path dir = Files.createTempDirectory("mods");
  78         deprecateModule("java.xml", true, "9", dir);
  79 
  80         // "load" the cloned java.xml
  81         Module module = loadModule(dir, "java.xml");
  82 
  83         // check the annotation is present
  84         assertTrue(module.isAnnotationPresent(Deprecated.class));
  85         Deprecated d = module.getAnnotation(Deprecated.class);
  86         assertNotNull(d, "@Deprecated not found");
  87         assertTrue(d.forRemoval());
  88         assertEquals(d.since(), "9");
  89         Annotation[] a = module.getAnnotations();
  90         assertTrue(a.length == 1);
  91         assertTrue(a[0] instanceof Deprecated);
  92         assertEquals(module.getDeclaredAnnotations(), a);
  93     }
  94 
  95 
  96     /**
  97      * Copy the module-info.class for the given module, add the
  98      * Deprecated annotation, and write the updated module-info.class
  99      * to a directory.
 100      */
 101     static void deprecateModule(String name,
 102                                 boolean forRemoval,
 103                                 String since,
 104                                 Path output) throws IOException {
 105         Module module = ModuleLayer.boot().findModule(name).orElse(null);
 106         assertNotNull(module, name + " not found");
 107 
 108         InputStream in = module.getResourceAsStream("module-info.class");
 109         assertNotNull(in, "No module-info.class for " + name);
 110 
 111         try (in) {
 112             ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
 113                                              + ClassWriter.COMPUTE_FRAMES);
 114 
 115             ClassVisitor cv = new ClassVisitor(Opcodes.ASM5, cw) { };
 116 
 117             ClassReader cr = new ClassReader(in);
 118 
 119             List<Attribute> attrs = new ArrayList<>();
 120             attrs.add(new ClassFileAttributes.ModuleAttribute());
 121             attrs.add(new ClassFileAttributes.ModulePackagesAttribute());
 122             attrs.add(new ClassFileAttributes.ModuleTargetAttribute());
 123             cr.accept(cv, attrs.toArray(new Attribute[0]), 0);
 124 
 125             AnnotationVisitor annotationVisitor
 126                 = cv.visitAnnotation("Ljava/lang/Deprecated;", true);
 127             annotationVisitor.visit("forRemoval", forRemoval);
 128             annotationVisitor.visit("since", since);
 129             annotationVisitor.visitEnd();
 130 
 131             byte[] bytes = cw.toByteArray();
 132             Path mi = output.resolve("module-info.class");
 133             Files.write(mi, bytes);
 134         }
 135     }
 136 
 137     /**
 138      * Load the module of the given name in the given directory into a
 139      * child layer.
 140      */
 141     static Module loadModule(Path dir, String name) throws IOException {
 142         ModuleFinder finder = ModuleFinder.of(dir);
 143 
 144         ModuleLayer bootLayer = ModuleLayer.boot();
 145 
 146         Configuration cf = bootLayer.configuration()
 147                 .resolve(finder, ModuleFinder.of(), Set.of(name));
 148 
 149         ClassLoader scl = ClassLoader.getSystemClassLoader();
 150         ModuleLayer layer = bootLayer.defineModulesWithOneLoader(cf, scl);
 151 
 152         Module module = layer.findModule(name).orElse(null);
 153         assertNotNull(module, name + " not loaded");
 154         return module;
 155     }
 156 }
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