1 /*
2 * Copyright (c) 2026, 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.PrintWriter;
25 import java.io.StringWriter;
26 import java.lang.invoke.MethodHandle;
27 import java.lang.invoke.MethodHandles;
28 import java.lang.reflect.Method;
29 import jdk.incubator.code.Reflect;
30 import jdk.incubator.code.Op;
31 import jdk.incubator.code.bytecode.BytecodeGenerator;
32 import jdk.incubator.code.dialect.core.CoreOp;
33 import jdk.incubator.code.dialect.core.CoreType;
34 import jdk.incubator.code.dialect.java.JavaOp;
35 import jdk.incubator.code.dialect.java.JavaType;
36 import jdk.incubator.code.dialect.java.MethodRef;
37 import org.junit.jupiter.api.Assertions;
38 import org.junit.jupiter.api.Test;
39
40 /*
41 * @test
42 * @modules jdk.incubator.code
43 * @enablePreview
44 * @run junit TestProtectedAccess
45 */
46 public class TestProtectedAccess extends PrintWriter {
47
48 public TestProtectedAccess() {
49 super(new StringWriter());
50 print("hello");
51 }
52
53 @Reflect
54 public String accessProtectedField() {
55 return out.toString();
56 }
57
58 @Reflect
59 public boolean accessProtectedMethod() {
60 setError();
61 return checkError();
62 }
63
64 @Test
65 public void testProtectedFieldAccess() throws Throwable {
66 Method accessMethod = TestProtectedAccess.class.getDeclaredMethod("accessProtectedField");
67 MethodHandle handle = BytecodeGenerator.generate(MethodHandles.lookup(),
68 Op.ofMethod(accessMethod).orElseThrow());
69 Assertions.assertEquals(new TestProtectedAccess().accessProtectedField(),
70 handle.invoke(new TestProtectedAccess()));
71 }
72
73 @Test
74 public void testProtectedMethodAccess() throws Throwable {
75 Method accessMethod = TestProtectedAccess.class.getDeclaredMethod("accessProtectedMethod");
76 MethodHandle handle = BytecodeGenerator.generate(MethodHandles.lookup(),
77 Op.ofMethod(accessMethod).orElseThrow());
78 Assertions.assertEquals(new TestProtectedAccess().accessProtectedMethod(),
79 (boolean) handle.invoke(new TestProtectedAccess()));
80 }
81
82 @Test
83 public void testArrayCloneAccess() throws Throwable {
84 var handle = BytecodeGenerator.generate(MethodHandles.lookup(), CoreOp.func("arrayCloneTest",
85 CoreType.functionType(JavaType.J_L_OBJECT, JavaType.array(JavaType.J_L_STRING))).body(bb ->
86 bb.add(CoreOp.return_(
87 bb.add(JavaOp.invoke(
88 MethodRef.method(JavaType.array(JavaType.J_L_STRING),
89 "clone",
90 JavaType.J_L_OBJECT),
91 bb.parameters().getFirst()))))));
92 String[] input = { "a", "b" };
93 Assertions.assertArrayEquals(input, (String[])handle.invoke(input));
94 }
95 }