1 /*
 2  * Copyright (c) 2020, 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 /*
25  * @test
26  * @summary Test a hidden inline class.
27  * @library /test/lib
28  * @modules jdk.compiler
29  * @compile HiddenPoint.jcod
30  * @run main HiddenInlineClassTest
31  */
32 
33 import java.io.File;
34 import java.lang.invoke.MethodHandles;
35 import java.lang.invoke.MethodHandles.Lookup;
36 import static java.lang.invoke.MethodHandles.Lookup.ClassOption.*;
37 import java.nio.file.Files;
38 import java.nio.file.Path;
39 import java.nio.file.Paths;
40 
41 public class HiddenInlineClassTest {
42 
43     static final Path CLASSES_DIR = Paths.get(System.getProperty("test.classes", "."));
44     String hello = "hello";
45 
46     static byte[] readClassFile(String classFileName) throws Exception {
47        Path path = CLASSES_DIR.resolve(classFileName.replace('.', File.separatorChar) + ".class");
48        return Files.readAllBytes(path);
49     }
50 
51     public static void main(String[] args) throws Throwable {
52         Lookup lookup = MethodHandles.lookup();
53         byte[] bytes = readClassFile("HiddenPoint");
54 
55         // Define a hidden class that is an inline type.
56         Class<?> c = lookup.defineHiddenClass(bytes, true).lookupClass();
57         Object hp = c.newInstance();
58         String s = (String)c.getMethod("getValue").invoke(hp);
59         if (!s.equals("x: 0, y: 0")) {
60             throw new RuntimeException(
61                 "wrong value returned by method getValue() in inline hidden class: " + s);
62         }
63     }
64 
65 }
66