org.osgi.framework
Class PackagePermission

java.lang.Object
  java.security.Permission
      java.security.BasicPermission
          org.osgi.framework.PackagePermission

All Implemented Interfaces:

java.io.Serializable, java.security.Guard

public final class PackagePermission
extends java.security.BasicPermission

A bundle's authority to import or export a package.

A package is a dot-separated string that defines a fully qualified Java package.

For example:

 
 org.osgi.service.http
 
 

PackagePermission has two actions: EXPORT and IMPORT. The EXPORT action implies the IMPORT action.

Version:

$Revision: 1.1 $

Author:

Open Services Gateway Initiative

See Also:

Serialized Form

Field Summary

static java.lang.String	EXPORT The action string export.
static java.lang.String	IMPORT The action string import.

Constructor Summary

PackagePermission(java.lang.String name, java.lang.String actions)
Defines the authority to import and/or export a package within the OSGi environment.

Method Summary

boolean	equals(java.lang.Object obj) Determines the equality of two PackagePermission objects.
java.lang.String	getActions() Returns the canonical string representation of the PackagePermission actions.
int	hashCode() Returns the hash code value for this object.
boolean	implies(java.security.Permission p) Determines if the specified permission is implied by this object.
java.security.PermissionCollection	newPermissionCollection() Returns a new PermissionCollection object suitable for storing PackagePermission objects.

Methods inherited from class java.security.Permission

checkGuard, getName, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

EXPORT

public static final java.lang.String EXPORT

The action string export.

See Also:

Constant Field Values

IMPORT

public static final java.lang.String IMPORT

The action string import.

See Also:

Constant Field Values

Constructor Detail

PackagePermission

public PackagePermission(java.lang.String name,
                         java.lang.String actions)

Defines the authority to import and/or export a package within the OSGi environment.

The name is specified as a normal Java package name: a dot-separated string. Wildcards may be used. For example:

   org.osgi.service.http
   javax.servlet.*
   *
 

Package Permissions are granted over all possible versions of a package. A bundle that needs to export a package must have the appropriate PackagePermission for that package; similarly, a bundle that needs to import a package must have the appropriate PackagePermssion for that package.

Permission is granted for both classes and resources.

Parameters:

name - Package name.

actions - EXPORT, IMPORT (canonical order).

Method Detail

implies

public boolean implies(java.security.Permission p)

Determines if the specified permission is implied by this object.

This method checks that the package name of the target is implied by the package name of this object. The list of PackagePermission actions must either match or allow for the list of the target object to imply the target PackagePermission action.

The permission to export a package implies the permission to import the named package.

   x.y.*,"export" -> x.y.z,"export" is true
   *,"import" -> x.y, "import"      is true
   *,"export" -> x.y, "import"      is true
   x.y,"export" -> x.y.z, "export"  is false
 

Overrides:

implies in class java.security.BasicPermission

Parameters:

p - The target permission to interrogate.

Returns:

true if the specified PackagePermission action is implied by this object; false otherwise.

getActions

public java.lang.String getActions()

Returns the canonical string representation of the PackagePermission actions.

Always returns present PackagePermission actions in the following order: EXPORT, IMPORT.

Overrides:

getActions in class java.security.BasicPermission

Returns:

Canonical string representation of the PackagePermission actions.

newPermissionCollection

public java.security.PermissionCollection newPermissionCollection()

Returns a new PermissionCollection object suitable for storing PackagePermission objects.

Overrides:

newPermissionCollection in class java.security.BasicPermission

Returns:

A new PermissionCollection object.

equals

public boolean equals(java.lang.Object obj)

Determines the equality of two PackagePermission objects. This method checks that specified package has the same package name and PackagePermission actions as this PackagePermission object.

Overrides:

equals in class java.security.BasicPermission

Parameters:

obj - The object to test for equality with this PackagePermission object.

Returns:

true if obj is a PackagePermission, and has the same package name and actions as this PackagePermission object; false otherwise.

hashCode

public int hashCode()

Returns the hash code value for this object.

Overrides:

hashCode in class java.security.BasicPermission

Returns:

A hash code value for this object.