/*
  * 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.test;
  
import java.security.AccessController;
import java.security.Principal;
import java.security.PrivilegedAction;

import javax.security.auth.Subject;
import javax.security.auth.login.Configuration;
import javax.security.jacc.PolicyContext;

//$Id$

/**
 *  Privileged Blocks
 *  @author Anil.Saldhana@redhat.com
 *  @since  Sep 25, 2007 
 *  @version $Revision$
 */
public class SecurityActions
{
   public static void addPrincipalToSubject(final Subject subj, final Principal p)
   {
      AccessController.doPrivileged(new PrivilegedAction<Object>()
      {
         public Object run()
         {
            subj.getPrincipals().add(p);
            return null;
         }
      }); 
   }
   
   public static void setJAASConfiguration(final Configuration configuration)
   {
      AccessController.doPrivileged(new PrivilegedAction<Object>()
      {
         public Object run()
         {
            Configuration.setConfiguration(configuration);
            return null;
         }
      });
   }
   
   public static void setPolicyContextID(final String contextID)
   {
      AccessController.doPrivileged(new PrivilegedAction<Object>()
      {
         public Object run()
         {
            PolicyContext.setContextID(contextID);
            return null;
         }
      });
   }

   interface SystemPropertyAction
   {
      SystemPropertyAction PRIVILEGED = new SystemPropertyAction()
      {
         public String getProperty(final String name, final String defaultValue)
         {
            String prop = AccessController.doPrivileged(
               new PrivilegedAction<String>()
               {
                  public String run()
                  {
                     return NON_PRIVILEGED.getProperty(name, defaultValue);
                  }
               }
            );
            return prop;
         }
      };
      SystemPropertyAction NON_PRIVILEGED = new SystemPropertyAction()
      {
         public String getProperty(final String name, final String defaultValue)
         {
            final String prop = System.getProperty(name, defaultValue);
            return prop;
         }
      };
      String getProperty(final String name, final String defaultValue);
   }

   public static String getProperty(final String name, final String defaultValue)
   {
      SecurityManager sm = System.getSecurityManager();
      final String prop;
      if( sm != null )
      {
         prop = SystemPropertyAction.PRIVILEGED.getProperty(name, defaultValue);
      }
      else
      {
         prop = SystemPropertyAction.NON_PRIVILEGED.getProperty(name, defaultValue);
      }
      return prop;
   }

}