path: root/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SecurityUtilities.java

/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Rhino code, released
 * May 6, 1999.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1997-1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Norris Boyd
 *   Igor Bukanov
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License Version 2 or later (the "GPL"), in which
 * case the provisions of the GPL are applicable instead of those above. If
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 * not delete the provisions above, a recipient may use your version of this
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package org.mozilla.javascript;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.ProtectionDomain;

/**
 * @author Attila Szegedi
 */
public class SecurityUtilities
{
    /**
     * Retrieves a system property within a privileged block. Use it only when
     * the property is used from within Rhino code and is not passed out of it.
     * @param name the name of the system property
     * @return the value of the system property
     */
    public static String getSystemProperty(final String name)
    {
        return (String)AccessController.doPrivileged(
            new PrivilegedAction()
            {
                public Object run()
                {
                    return System.getProperty(name);
                }
            });
    }
    
    public static ProtectionDomain getProtectionDomain(final Class clazz)
    {
        return (ProtectionDomain)AccessController.doPrivileged(
                new PrivilegedAction()
                {
                    public Object run()
                    {
                        return clazz.getProtectionDomain();
                    }
                });
    }
}