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/*
* Copyright (c) 1999, 2023, 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 4227192 8004928 8072656 8319436
* @summary This is a test of the restrictions on the parameters that may
* be passed to the Proxy.getProxyClass method.
* @author Peter Jones
*
* @build ClassRestrictions
* @run junit ClassRestrictions
*/
import java.io.File;
import java.lang.reflect.Modifier;
import java.lang.reflect.Proxy;
import java.net.URLClassLoader;
import java.net.URL;
import java.nio.file.Paths;
import java.util.List;
import java.util.stream.Stream;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import static org.junit.jupiter.api.Assertions.*;
public class ClassRestrictions {
public interface Bar {
int foo();
}
public interface Baz {
long foo();
}
interface Bashful {
void foo();
}
private static final String TEST_CLASSES = System.getProperty("test.classes", ".");
private static final ClassLoader LOADER = ClassRestrictions.class.getClassLoader();
static Stream<List<Class<?>>> badProxyInterfaces() {
return Stream.of(
List.of(Object.class), // proxy interface cannot be a class
List.of(int.class), // proxy interface can't be primitive type
List.of(Bar.class, Bar.class), // cannot have repeated interfaces
// two proxy interfaces have the method of same method name but different return type
List.of(Bar.class, Baz.class)
);
}
/*
* Test cases for illegal proxy interfaces
*/
@ParameterizedTest
@MethodSource("badProxyInterfaces")
void testForName(List<Class<?>> interfaces) {
assertThrows(IllegalArgumentException.class, () -> Proxy.getProxyClass(LOADER, interfaces.toArray(Class[]::new)));
}
private static final String nonPublicIntrfaceName = "java.util.zip.ZipConstants";
/*
* All non-public interfaces must be in the same package.
*/
@Test
void testNonPublicIntfs() throws Exception {
var nonPublic1 = Bashful.class;
var nonPublic2 = Class.forName(nonPublicIntrfaceName);
assertFalse(Modifier.isPublic(nonPublic2.getModifiers()),
"Interface " + nonPublicIntrfaceName + " is public and need to be changed!");
var interfaces = new Class<?>[] { nonPublic1, nonPublic2 };
assertThrows(IllegalArgumentException.class, () -> Proxy.getProxyClass(LOADER, interfaces));
}
static Stream<ClassLoader> loaders() {
return Stream.of(null,
ClassLoader.getPlatformClassLoader(),
ClassLoader.getSystemClassLoader(),
LOADER);
}
/*
* All of the interfaces types must be visible by name though the
* specified class loader.
*/
@ParameterizedTest
@MethodSource("loaders")
void testNonVisibleInterface(ClassLoader loader) throws Exception {
String[] cpaths = TEST_CLASSES.split(File.pathSeparator);
URL[] urls = new URL[cpaths.length];
for (int i = 0; i < cpaths.length; i++) {
urls[i] = Paths.get(cpaths[i]).toUri().toURL();
}
var altLoader = new URLClassLoader(urls, null);
var altBarClass = Class.forName(Bar.class.getName(), false, altLoader);
var interfaces = new Class<?>[]{ altBarClass };
assertThrows(IllegalArgumentException.class, () -> Proxy.getProxyClass(loader, interfaces));
}
}
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