+++ /dev/null
-/* Policy.java --- Policy Manager Class
- Copyright (C) 1999 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath 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 for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-package java.security;
-
-/**
- Policy is an abstract class for managing the system security
- policy for the Java application environment. It specifies
- which permissions are available for code from various
- sources. The security policy is represented through a
- subclass of Policy.
-
- Only one Policy is in effect at any time. ProtectionDomain
- initializes itself with information from this class on the
- set of permssions to grant.
-
- The location for the actual Policy could be anywhere in any
- form because it depends on the Policy implementation. The
- default system is in a flat ASCII file or it could be in a
- database.
-
- The current installed Policy can be accessed with getPolicy
- and changed with setPolicy if the code has the correct
- permissions.
-
- The refresh method causes the Policy class to refresh/reload
- its configuration. The method used to refresh depends on the
- Policy implementation.
-
- When a protection domain initializes its permissions it uses
- code like:
- <code>
- policy = Policy.getPolicy();
- permissionCollection perms = policy.getPermissions(MyCodeSource)
- </code>
- The protection domain passes the Policy handler a CodeSource
- object which contains the codebase URL and public key. The
- Policy implementation then returns the proper set of
- permissions for the CodeSource.
-
- The default Policy implementation can be changed by setting
- the "policy.provider" security provider in java.security
- to the correct Policy implementation class.
-
- @author Mark Benvenuto
-
- @since JDK 1.2
- */
-public abstract class Policy
-{
- // FIXME: The class name of the Policy provider should really be sourced
- // from the "java.security" configuration file. For now, just hard-code
- // a stub implementation.
- static private Policy currentPolicy
- = new gnu.java.security.provider.DefaultPolicy();
-
- /**
- Constructs a new Policy class.
- */
- public Policy()
- {
- }
-
- /**
- Gets the currently installed Policy handler. The value should
- not be cached as it can be changed by setPolicy. This
- function first calls <code>SecurityManager.checkPermission</code>
- with <code>SecurityPermission("getPolicy")</code> to check
- if the caller has Permission to get the current Policy.
-
- @return the current Policy
-
- @throws SecurityException if the security manager exists
- the caller does not have permission to
- <code>getPolicy</code>.
- */
- public static Policy getPolicy()
- {
- SecurityManager sm = System.getSecurityManager();
- if (sm != null)
- sm.checkPermission(new SecurityPermission("getPolicy"));
-
- return currentPolicy;
- }
-
- /**
- Sets the currently installed Policy handler. This
- function first calls <code>SecurityManager.checkPermission</code>
- with <code>SecurityPermission("setPolicy")</code> to check
- if the caller has Permission to get the current Policy.
-
- @param policy the new Policy to use
-
- @throws SecurityException if the security manager exists
- the caller does not have permission to
- <code>getPolicy</code>.
- */
- public static void setPolicy(Policy policy)
- {
- SecurityManager sm = System.getSecurityManager();
- if (sm != null)
- sm.checkPermission(new SecurityPermission("setPolicy"));
-
- currentPolicy = policy;
- }
-
-
- /**
- Evalutes the global policy and returns a set of Permissions
- allowed for the specified CodeSource.
-
- @param codesource The CodeSource to get Permission for
-
- @return a set of permissions for codesource specified by
- the current policy
-
- @throws SecurityException if the current thread does not
- have permission to call <code>getPermissions</code>
- */
- public abstract PermissionCollection getPermissions(CodeSource codesource);
-
- /**
- Refreshes and/or reloads the current Policy. The actual
- behavior of this method depends on the implementation.
- */
- public abstract void refresh();
-}
projects / msp430-gcc.git / blobdiff