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/*
* Copyright (c) 2018, 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.
*/
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.concurrent.Callable;
/**
* Each nested class tests a member of a specific access.
*
* Caller class is cached when setAccessible is not used to suppress the access
* check and only access allowed. If not accessible, caller class is not cached.
*/
public class AccessTest {
public static class PublicConstructor implements Callable<Object> {
public Object call() throws Exception {
Constructor c = Members.class.getConstructor();
return c.newInstance();
}
}
public static class PublicMethod extends Members implements Callable<Void> {
public Void call() throws Exception {
Method m = Members.class.getDeclaredMethod("publicMethod");
m.invoke(new PublicMethod());
return null;
}
}
public static class ProtectedMethod extends Members implements Callable<Void> {
public Void call() throws Exception {
Method m = Members.class.getDeclaredMethod("protectedMethod");
m.invoke(new ProtectedMethod());
return null;
}
}
/*
* private field is not accessible. So caller class is not cached.
*/
public static class PrivateMethod extends Members implements Callable<Void> {
public Void call() throws Exception {
Method m = Members.class.getDeclaredMethod("privateMethod");
try {
m.invoke(new ProtectedMethod());
} catch (IllegalAccessException e) {
}
return null;
}
}
public static class PublicField extends Members implements Callable<Void> {
public Void call() throws Exception {
Field f = Members.class.getDeclaredField("publicField");
f.get(new PublicField());
return null;
}
}
public static class ProtectedField extends Members implements Callable<Void> {
public Void call() throws Exception {
Field f = Members.class.getDeclaredField("protectedField");
f.get(new ProtectedField());
return null;
}
}
/*
* private field is not accessible. So caller class is not cached.
*/
public static class PrivateField implements Callable<Void> {
public Void call() throws Exception {
Field f = Members.class.getDeclaredField("privateField");
try {
f.get(new Members());
} catch (IllegalAccessException e) {
}
return null;
}
}
/*
* Validate final field
*/
public static class FinalField implements Callable<Void> {
final Field f;
final boolean isStatic;
public FinalField(String name) throws Exception {
this.f = Members.class.getDeclaredField(name);
this.isStatic = Modifier.isStatic(f.getModifiers());
if (!Modifier.isFinal(f.getModifiers())) {
throw new RuntimeException("not a final field");
}
makeFinalNonFinal(f);
}
public Void call() throws Exception {
Members obj = isStatic ? null : new Members();
try {
f.set(obj, 20);
checkValue(obj, 20);
} catch (IllegalAccessException e) {
throw e;
}
return null;
}
void checkValue(Object obj, int expected) throws Exception {
int value = (int) f.get(obj);
if (value != expected) {
throw new RuntimeException("unexpectd value: " + value);
}
}
}
public static class PublicFinalField extends FinalField {
public PublicFinalField() throws Exception {
super("publicFinalField");
}
}
public static class PrivateFinalField extends FinalField {
public PrivateFinalField() throws Exception {
super("privateFinalField");
}
}
public static class PublicStaticFinalField extends FinalField {
public PublicStaticFinalField() throws Exception {
super("publicStaticFinalField");
}
}
public static class PrivateStaticFinalField extends FinalField {
public PrivateStaticFinalField() throws Exception {
super("privateStaticFinalField");
}
}
private static void makeFinalNonFinal(Field f) throws ReflectiveOperationException {
Field modifiers = Field.class.getDeclaredField("modifiers");
modifiers.setAccessible(true);
modifiers.set(f, modifiers.getInt(f) & ~Modifier.FINAL);
f.setAccessible(true);
if (Modifier.isFinal(f.getModifiers())) {
throw new RuntimeException("should be a non-final field");
}
}
}
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