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PicketBox is a security project for Java Applications.
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/*
  * JBoss, Home of Professional Open Source
  * Copyright 2007, JBoss Inc., and individual contributors as indicated
  * by the @authors tag. See the copyright.txt in the distribution for a
  * full listing of individual contributors.
  *
  * This is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation; either version 2.1 of
  * the License, or (at your option) any later version.
  *
  * This software 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this software; if not, write to the Free
  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
  */
package org.jboss.security.plugins.audit;

import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
 
/**
 *  Privileged Blocks
 *  @author [email protected]
 *  @since  May 11, 2007 
 *  @version $Revision$
 */
class SecurityActions
{
	static void setContextClassLoader(final ClassLoader tccl) throws PrivilegedActionException
	{
		AccessController.doPrivileged(new PrivilegedExceptionAction()
		{ 
			public ClassLoader run()
			{
				Thread.currentThread().setContextClassLoader(tccl);
				return null;
			}
	    });
	}

   static ClassLoader getContextClassLoader() throws PrivilegedActionException
   {
      return AccessController.doPrivileged(new PrivilegedExceptionAction()
      { 
         public ClassLoader run()
         {
            return Thread.currentThread().getContextClassLoader();
         }
      });
   }
   
   static Class loadClass(final String name) throws PrivilegedActionException 
   {
      return AccessController.doPrivileged(new PrivilegedExceptionAction>()
      {
         public Class run() throws PrivilegedActionException
         {
            try
            {
               return getClass().getClassLoader().loadClass(name);
            }
            catch (Exception ignore)
            {
               try
               {
                  return getContextClassLoader().loadClass(name);
               }
               catch (Exception e)
               {
                  throw new PrivilegedActionException(e);
               }
            }
         }
      });
   }
   
   static Class loadClass(final ClassLoader cl, final String name) throws PrivilegedActionException 
   {
      return AccessController.doPrivileged(new PrivilegedExceptionAction>()
      {
         public Class run() throws PrivilegedActionException
         {
        	if(cl == null)
        	{
        		return loadClass(name);
        	}
            try
            {
               return cl.loadClass(name);
            }
            catch (Exception ignore)
            {
                  return loadClass(name);
            }
         }
      });
   }
}