/*
 * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source 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, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *   Free SoftwareFoundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.security;

import com.caucho.loader.EnvironmentLocal;

import java.security.Permission;

/**
 * Manages the permission for a context.
 */
public class PermissionManager {
  private static EnvironmentLocal<PermissionManager> _localPermissionManager =
    new EnvironmentLocal<PermissionManager>("caucho.security.permission-manager");

  /**
   * Returns the context security manager.
   */
  public static PermissionManager getPermissionManager()
  {
    return _localPermissionManager.get();
  }

  /**
   * Sets the context security manager.
   */
  public static void setPermissionManager(PermissionManager manager)
  {
    _localPermissionManager.set(manager);
  }

  /**
   * Checks the permission.
   */
  public void checkPermission(Permission permission)
    throws SecurityException
  {
    SecurityManager securityManager = System.getSecurityManager();

    // First check the security manager
    if (securityManager != null)
      securityManager.checkPermission(permission);
  }
  
  public String toString()
  {
    return "PermissionManager[]";
  }
}
