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  /*
   * Copyright (c) OSGi Alliance (2001, 2008). All Rights Reserved.
   * 
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 package org.osgi.service.permissionadmin;

The Permission Admin service allows management agents to manage the permissions of bundles. There is at most one Permission Admin service present in the OSGi environment.

Access to the Permission Admin service is protected by corresponding ServicePermission. In addition AdminPermission is required to actually set permissions.

Bundle permissions are managed using a permission table. A bundle's location serves as the key into this permission table. The value of a table entry is the set of permissions (of type PermissionInfo) granted to the bundle named by the given location. A bundle may have an entry in the permission table prior to being installed in the Framework.

The permissions specified in setDefaultPermissions are used as the default permissions which are granted to all bundles that do not have an entry in the permission table.

Any changes to a bundle's permissions in the permission table will take effect no later than when bundle's java.security.ProtectionDomain is next involved in a permission check, and will be made persistent.

Only permission classes on the system classpath or from an exported package are considered during a permission check. Additionally, only permission classes that are subclasses of java.security.Permission and define a 2-argument constructor that takes a name string and an actions string can be used.

Permissions implicitly granted by the Framework (for example, a bundle's permission to access its persistent storage area) cannot be changed, and are not reflected in the permissions returned by getPermissions and getDefaultPermissions.

Version:
$Revision: 5673 $
ThreadSafe:
 
 public interface PermissionAdmin {
Gets the permissions assigned to the bundle with the specified location.

Parameters:
location The location of the bundle whose permissions are to be returned.
Returns:
The permissions assigned to the bundle with the specified location, or null if that bundle has not been assigned any permissions.
 
Assigns the specified permissions to the bundle with the specified location.

Parameters:
location The location of the bundle that will be assigned the permissions.
permissions The permissions to be assigned, or null if the specified location is to be removed from the permission table.
Throws:
java.lang.SecurityException If the caller does not have AllPermission.
 
 	void setPermissions(String locationPermissionInfo[] permissions);

Returns the bundle locations that have permissions assigned to them, that is, bundle locations for which an entry exists in the permission table.

Returns:
The locations of bundles that have been assigned any permissions, or null if the permission table is empty.
 
Gets the default permissions.

These are the permissions granted to any bundle that does not have permissions assigned to its location.

Returns:
The default permissions, or null if no default permissions are set.
Sets the default permissions.

These are the permissions granted to any bundle that does not have permissions assigned to its location.

Parameters:
permissions The default permissions, or null if the default permissions are to be removed from the permission table.
Throws:
java.lang.SecurityException If the caller does not have AllPermission.
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