com.sun.istack.tools.SecureLoader Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.istack.tools;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Class defined for safe calls of getClassLoader methods of any kind (context/system/class
* classloader. This MUST be package private and defined in every package which
* uses such invocations.
* @author snajper
*/
class SecureLoader {
static ClassLoader getContextClassLoader() {
if (System.getSecurityManager() == null) {
return Thread.currentThread().getContextClassLoader();
} else {
return AccessController.doPrivileged(
new PrivilegedAction() {
@Override
public ClassLoader run() {
return Thread.currentThread().getContextClassLoader();
}
});
}
}
static ClassLoader getClassClassLoader(final Class c) {
if (System.getSecurityManager() == null) {
return c.getClassLoader();
} else {
return AccessController.doPrivileged(
new PrivilegedAction() {
@Override
public ClassLoader run() {
return c.getClassLoader();
}
});
}
}
static ClassLoader getSystemClassLoader() {
if (System.getSecurityManager() == null) {
return ClassLoader.getSystemClassLoader();
} else {
return AccessController.doPrivileged(
new PrivilegedAction() {
@Override
public ClassLoader run() {
return ClassLoader.getSystemClassLoader();
}
});
}
}
static ClassLoader getParentClassLoader(final ClassLoader cl) {
if (System.getSecurityManager() == null) {
return cl.getParent();
} else {
return AccessController.doPrivileged(
new PrivilegedAction() {
@Override
public ClassLoader run() {
return cl.getParent();
}
});
}
}
static void setContextClassLoader(final ClassLoader cl) {
if (System.getSecurityManager() == null) {
Thread.currentThread().setContextClassLoader(cl);
} else {
AccessController.doPrivileged(
new PrivilegedAction() {
@Override
public ClassLoader run() {
Thread.currentThread().setContextClassLoader(cl);
return null;
}
});
}
}
}