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/*
* Copyright (c) 2017, 2021, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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
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package com.sun.webkit;
import com.sun.javafx.reflect.MethodUtil;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import com.sun.javafx.reflect.ReflectUtil;
/**
* Utility class to wrap method invocation.
*/
public class MethodHelper {
@SuppressWarnings("removal")
private static final boolean logAccessErrors
= AccessController.doPrivileged((PrivilegedAction) ()
-> Boolean.getBoolean("sun.reflect.debugModuleAccessChecks"));
private static final Module trampolineModule = MethodUtil.getTrampolineModule();
public static Object invoke(Method m, Object obj, Object[] params)
throws InvocationTargetException, IllegalAccessException {
// Check that the class in question is in a package that is open to
// this module (or exported unconditionally). If so, then we will open
// the containing package to the unnamed trampoline module. If not,
// we will throw an IllegalAccessException in order to generate a
// clearer error message.
final Class clazz = m.getDeclaringClass();
final String packageName = clazz.getPackage().getName();
final Module module = clazz.getModule();
final Module thisModule = MethodHelper.class.getModule();
try {
// Verify that the module being called either exports the package
// in question unconditionally or opens the package in question to
// this module.
if (!module.isExported(packageName)) {
if (!module.isOpen(packageName, thisModule)) {
throw new IllegalAccessException(
"module " + thisModule.getName()
+ " cannot access class " + clazz.getName()
+ " (in module " + module.getName()
+ ") because module " + module.getName()
+ " does not open " + packageName
+ " to " + thisModule.getName());
}
if (!module.isOpen(packageName, trampolineModule)) {
ReflectUtil.checkPackageAccess(packageName);
module.addOpens(packageName, trampolineModule);
}
}
} catch (IllegalAccessException ex) {
if (logAccessErrors) {
ex.printStackTrace(System.err);
}
throw ex;
}
return MethodUtil.invoke(m, obj, params);
}
// Utility class, do not instantiate
private MethodHelper() {
}
}