/*
  * JBoss, Home of Professional Open Source
  * Copyright 2005, 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.util;

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

/**
 * Priviledged actions for the package
 * @author Scott.Stark@jboss.org
 * @version $Revision: 2787 $
 */
@SuppressWarnings("unchecked")
class SysPropertyActions
{
   interface SysProps
   {
      SysProps NON_PRIVILEDGED = new SysProps()
      {
         public String getProperty(final String name, final String defaultValue)
         {
            return System.getProperty(name, defaultValue);
         }
      };
      SysProps PRIVILEDGED = new SysProps()
      {
         public String getProperty(final String name, final String defaultValue)
         {
            PrivilegedAction action = new PrivilegedAction()
            {
               public Object run()
               {
                  return System.getProperty(name, defaultValue);
               }
            };
            return (String) AccessController.doPrivileged(action);
         }
      };
      String getProperty(String name, String defaultValue);
   }

   public static String getProperty(String name, String defaultValue)
   {
      String prop;
      if( System.getSecurityManager() == null )
         prop = SysProps.NON_PRIVILEDGED.getProperty(name, defaultValue);
      else
         prop = SysProps.PRIVILEDGED.getProperty(name, defaultValue);
      return prop;
   }
}
