/*
 * Copyright 2004 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.jdi;

/**
 * The <code>JDIPermission</code> class represents access rights to
 * the <code>VirtualMachineManager</code>.  This is the permission
 * which the SecurityManager will check when code that is running with
 * a SecurityManager requests access to the VirtualMachineManager, as
 * defined in the Java Debug Interface (JDI) for the Java platform.
 * <P>
 * A <code>JDIPermission</code> object contains a name (also referred
 * to as a "target name") but no actions list; you either have the
 * named permission or you don't.
 * <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, what 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>virtualMachineManager</td>
 *   <td>Ability to inspect and modify the JDI objects in the
 *   <code>VirtualMachineManager</code>
 *   </td>
 *   <td>This allows an attacker to control the
 *   <code>VirtualMachineManager</code> and cause the system to
 *   misbehave.
 *   </td>
 * </tr>
 *
 * </table>
 *
 * <p>
 * Programmers do not normally create JDIPermission objects directly.
 * Instead they are created by the security policy code based on reading
 * the security policy file.
 *
 * @author  Tim Bell
 * @since   1.5
 *
 * @see com.sun.jdi.Bootstrap
 * @see java.security.BasicPermission
 * @see java.security.Permission
 * @see java.security.Permissions
 * @see java.security.PermissionCollection
 * @see java.lang.SecurityManager
 *
 */

public final class JDIPermission extends java.security.BasicPermission {

    /**
     * The <code>JDIPermission</code> class represents access rights to the
     * <code>VirtualMachineManager</code>
     * @param name Permission name. Must be "virtualMachineManager".
     * @throws IllegalArgumentException if the name argument is invalid.
     */
    public JDIPermission(String name) {
        super(name);
        if (!name.equals("virtualMachineManager")) {
            throw new IllegalArgumentException("name: " + name);
        }
    }

    /**
     * Constructs a new JDIPermission object.
     *
     * @param name Permission name. Must be "virtualMachineManager".
     * @param actions Must be either null or the empty string.
     * @throws IllegalArgumentException if arguments are invalid.
     */
    public JDIPermission(String name, String actions)
        throws IllegalArgumentException {
        super(name);
        if (!name.equals("virtualMachineManager")) {
            throw new IllegalArgumentException("name: " + name);
        }
        if (actions != null && actions.length() > 0) {
            throw new IllegalArgumentException("actions: " + actions);
        }
    }
}