/*
* @(#)Guard.java 1.15 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program 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
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package java.security;
/**
* <p> This interface represents a guard, which is an object that is used
* to protect access to another object.
*
* <p>This interface contains a single method, <code>checkGuard</code>,
* with a single <code>object</code> argument. <code>checkGuard</code> is
* invoked (by the GuardedObject <code>getObject</code> method)
* to determine whether or not to allow access to the object.
*
* @see GuardedObject
*
* @version 1.9 00/02/02
* @author Roland Schemers
* @author Li Gong
*/
public interface Guard {
/**
* Determines whether or not to allow access to the guarded object
* <code>object</code>. Returns silently if access is allowed.
* Otherwise, throws a SecurityException.
*
* @param object the object being protected by the guard.
*
* @exception SecurityException if access is denied.
*
*/
void checkGuard(Object object) throws SecurityException;
}