/*
* Copyright ( c ) 1997 , 2022 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code 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 . Oracle designates this
* particular file as subject to the " Classpath " exception as provided
* by Oracle in the LICENSE file that accompanied this code .
*
* This code 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 in the LICENSE file that
* accompanied this code ) .
*
* 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 Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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*/
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 } ,
* with a single { @ code object } argument . { @ code checkGuard } is
* invoked ( by the GuardedObject { @ code getObject } method )
* to determine whether to allow access to the object .
*
* @ see GuardedObject
*
* @ author Roland Schemers
* @ author Li Gong
* @ since 1 . 2
*/
public interface Guard {
/**
* Determines whether to allow access to the guarded object
* { @ code object } . Returns silently if access is allowed .
* Otherwise , throws a { @ code SecurityException } .
*
* @ param object the object being protected by the guard .
*
* @ throws SecurityException if access is denied .
*
*/
void checkGuard(Object object) throws SecurityException;
}
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