nopermissionsm.java

来自「cqME :java framework for TCK test.」· Java 代码 · 共 79 行

/*
 * $Id$
 *
 * Copyright 1996-2007 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 com.sun.tck.cdc.lib.security;

import java.security.Permission;
import java.security.Permissions;
import java.util.Enumeration;

/**
 * This class provides a security manager that forbids certain permissions
 * and grant all other permissions.
 */
class NoPermissionSM extends SecurityManager {

    /**
     * Constructs a SecurityManager that will forbid all permissions
     * specified in perms.
     *
     * @param perms denied permissions
     */
    public NoPermissionSM(Permissions perms) {
        this.perms = perms;
    }
    
    /**
     *  Forbids actions which are specified in the constructor.
     *  @param p checked permission
     */
    public void checkPermission(Permission p) {
        for (Enumeration e = perms.elements(); e.hasMoreElements();) {
            Permission curPerm = (Permission) e.nextElement();
            if (curPerm.implies(p)) {
                throw new SecurityException();             
            }
        }
    }

    /**
     *  Forbids actions which are specified in the constructor.
     *  @param p checked permission
     */
    public void checkPermission(Permission p, Object context) {

        for (Enumeration e = perms.elements(); e.hasMoreElements();) {
            Permission curPerm = (Permission) e.nextElement();
            if (curPerm.implies(p)) {
                throw new SecurityException();
            }
        }
    }

    private Permissions perms;
}