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/*
* Copyright (c) 2013, 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 8026213
* @summary Reflection support for private methods in interfaces
* @author Robert Field
* @run main TestPrivateInterfaceMethodReflect
*/
import java.lang.reflect.*;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
public class TestPrivateInterfaceMethodReflect {
static final String INTERFACE_NAME = "PrivateInterfaceMethodReflectTest_Interface";
static final String CLASS_NAME = "PrivateInterfaceMethodReflectTest_Class";
static final int EXPECTED = 1234;
static class TestClassLoader extends ClassLoader implements Opcodes {
@Override
public Class findClass(String name) throws ClassNotFoundException {
byte[] b;
try {
b = loadClassData(name);
} catch (Throwable th) {
// th.printStackTrace();
throw new ClassNotFoundException("Loading error", th);
}
return defineClass(name, b, 0, b.length);
}
private byte[] loadClassData(String name) throws Exception {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
switch (name) {
case INTERFACE_NAME:
cw.visit(V1_8, ACC_ABSTRACT | ACC_INTERFACE | ACC_PUBLIC, INTERFACE_NAME, null, "java/lang/Object", null);
{
mv = cw.visitMethod(ACC_PRIVATE, "privInstance", "()I", null, null);
mv.visitCode();
mv.visitLdcInsn(EXPECTED);
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
break;
case CLASS_NAME:
cw.visit(52, ACC_SUPER | ACC_PUBLIC, CLASS_NAME, null, "java/lang/Object", new String[]{INTERFACE_NAME});
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
break;
default:
break;
}
cw.visitEnd();
return cw.toByteArray();
}
}
public static void main(String[] args) throws Exception {
TestClassLoader tcl = new TestClassLoader();
Class<?> itf = tcl.loadClass(INTERFACE_NAME);
Class<?> k = tcl.loadClass(CLASS_NAME);
Object inst = k.newInstance();
Method[] meths = itf.getDeclaredMethods();
if (meths.length != 1) {
throw new Exception("Expected one method in " + INTERFACE_NAME + " instead " + meths.length);
}
Method m = meths[0];
int mod = m.getModifiers();
if ((mod & Modifier.PRIVATE) == 0) {
throw new Exception("Expected " + m + " to be private");
}
if ((mod & Modifier.STATIC) != 0) {
throw new Exception("Expected " + m + " to be instance method");
}
m.setAccessible(true);
for (int i = 1; i < 200; i++) {
if (!m.invoke(inst).equals(EXPECTED)) {
throw new Exception("Expected " + EXPECTED + " from " + m);
}
}
System.out.println("Passed.");
}
}
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