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Java Source | 1998-03-20 | 1.4 KB | 47 lines |
- /*
- * @(#)Guard.java 1.4 98/03/18
- *
- * Copyright 1997 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- package java.security;
-
- /**
- * <p> This interface represents a guard. A guard 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 1.4 98/03/18
- * @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;
- }
-