org.osgi.framework

Class BundlePermission

java.lang.Object

java.security.Permission

java.security.BasicPermission

org.osgi.framework.BundlePermission

All Implemented Interfaces:

java.io.Serializable, java.security.Guard

public final class BundlePermission
extends java.security.BasicPermission

A bundle's authority to require or provide a bundle or to receive or attach fragments.

A bundle symbolic name defines a unique fully qualified name.

For example:

 
 org.osgi.example.bundle
 
 

BundlePermission has four actions: PROVIDE, REQUIRE,HOST, and FRAGMENT. The PROVIDE action implies the REQUIRE action.

Since:

1.3

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	FRAGMENT The action string fragment.
static java.lang.String	HOST The action string host.
static java.lang.String	PROVIDE The action string provide.
static java.lang.String	REQUIRE The action string require.

Constructor Summary

Constructors

Constructor and Description
BundlePermission(java.lang.String symbolicName, java.lang.String actions) Defines the authority to provide and/or require and or specify a host fragment symbolic name within the OSGi environment.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Determines the equality of two BundlePermission objects.
java.lang.String	getActions() Returns the canonical string representation of the BundlePermission 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 BundlePermission 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

PROVIDE

public static final java.lang.String PROVIDE

The action string provide.

See Also:

Constant Field Values

REQUIRE

public static final java.lang.String REQUIRE

The action string require.

See Also:

Constant Field Values

HOST

public static final java.lang.String HOST

The action string host.

See Also:

Constant Field Values

FRAGMENT

public static final java.lang.String FRAGMENT

The action string fragment.

See Also:

Constant Field Values

Constructor Detail

BundlePermission

public BundlePermission(java.lang.String symbolicName,
                java.lang.String actions)

Defines the authority to provide and/or require and or specify a host fragment symbolic name within the OSGi environment.

Bundle Permissions are granted over all possible versions of a bundle. A bundle that needs to provide a bundle must have the appropriate BundlePermission for the symbolic name; a bundle that requires a bundle must have the appropriate BundlePermssion for that symbolic name; a bundle that specifies a fragment host must have the appropriate BundlePermission for that symbolic name.

Parameters:

symbolicName - the bundle symbolic name.

actions - PROVIDE,REQUIRE, HOST,FRAGMENT (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 symbolic name of the target is implied by the symbolic name of this object. The list of BundlePermission actions must either match or allow for the list of the target object to imply the target BundlePermission action.

The permission to provide a bundle implies the permission to require the named symbolic name.

       x.y.*,"provide" -> x.y.z,"provide" is true
       *,"require" -> x.y, "require"      is true
       *,"provide" -> x.y, "require"      is true
       x.y,"provide" -> x.y.z, "provide"  is false
 

Overrides:

implies in class java.security.BasicPermission

Parameters:

p - The target permission to interrogate.

Returns:

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

getActions

public java.lang.String getActions()

Returns the canonical string representation of the BundlePermission actions.

Always returns present BundlePermission actions in the following order: PROVIDE,REQUIRE, HOST,FRAGMENT.

Overrides:

getActions in class java.security.BasicPermission

Returns:

Canonical string representation of the BundlePermission actions.

newPermissionCollection

public java.security.PermissionCollection newPermissionCollection()

Returns a new PermissionCollection object suitable for storing BundlePermission 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 BundlePermission objects. This method checks that specified bundle has the same bundle symbolic name and BundlePermission actions as this BundlePermission object.

Overrides:

equals in class java.security.BasicPermission

Parameters:

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

Returns:

true if obj is a BundlePermission, and has the same bundle symbolic name and actions as this BundlePermission 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.