/* * Copyright (c) 1997, 1998, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ 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 * * @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; }