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* Copyright (c) 2003, 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.
*
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*/
package java.lang.management;
/**
* The permission which the SecurityManager will check when code
* that is running with a SecurityManager calls methods defined
* in the management interface for the Java platform.
* <P>
* The following table
* provides a summary description of what the permission allows,
* and discusses the risks of granting code the permission.
* <P>
*
* <table border=1 cellpadding=5 summary="Table shows permission target name, wh
at the permission allows, and associated risks">
* <tr>
* <th>Permission Target Name</th>
* <th>What the Permission Allows</th>
* <th>Risks of Allowing this Permission</th>
* </tr>
*
* <tr>
* <td>control</td>
* <td>Ability to control the runtime characteristics of the Java virtual
* machine, for example, setting the -verbose:gc and -verbose:class flag,
* setting the threshold of a memory pool, and enabling and disabling
* the thread contention monitoring support.
* </td>
* <td>This allows an attacker to control the runtime characteristics
* of the Java virtual machine and cause the system to misbehave.
* </td>
* </tr>
* <tr>
* <td>monitor</td>
* <td>Ability to retrieve runtime information about
* the Java virtual machine such as thread
* stack trace, a list of all loaded class names, and input arguments
* to the Java virtual machine.</td>
* <td>This allows malicious code to monitor runtime information and
* uncover vulnerabilities.</td>
* </tr>
*
* </table>
*
* <p>
* Programmers do not normally create ManagementPermission objects directly.
* Instead they are created by the security policy code based on reading
* the security policy file.
*
* @author Mandy Chung
* @since 1.5
*
* @see java.security.BasicPermission
* @see java.security.Permission
* @see java.security.Permissions
* @see java.security.PermissionCollection
* @see java.lang.SecurityManager
*
*/
public final class ManagementPermission extends java.security.BasicPermission {
/**
* Constructs a ManagementPermission with the specified name.
*
* @param name Permission name. Must be either "monitor" or "control".
*
* @throws NullPointerException if <code>name</code> is <code>null</code>.
* @throws IllegalArgumentException if <code>name</code> is empty or invalid.
*/
public ManagementPermission(String name) {
super(name);
if (!name.equals("control") && !name.equals("monitor")) {
throw new IllegalArgumentException("name: " + name);
}
}
/**
* Constructs a new ManagementPermission object.
*
* @param name Permission name. Must be either "monitor" or "control".
* @param actions Must be either null or the empty string.
*
* @throws NullPointerException if <code>name</code> is <code>null</code>.
* @throws IllegalArgumentException if <code>name</code> is empty or
* if arguments are invalid.
*/
public ManagementPermission(String name, String actions)
throws IllegalArgumentException {
super(name);
if (!name.equals("control") && !name.equals("monitor")) {
throw new IllegalArgumentException("name: " + name);
}
if (actions != null && actions.length() > 0) {
throw new IllegalArgumentException("actions: " + actions);
}
}
}