org.osgi.framework

Class AdaptPermission

java.lang.Object

java.security.Permission

java.security.BasicPermission

org.osgi.framework.AdaptPermission

All Implemented Interfaces:

java.io.Serializable, java.security.Guard

public final class AdaptPermission
extends java.security.BasicPermission

A bundle's authority to adapt an object to a type.

AdaptPermission has one action: adapt.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private static int	ACTION_ADAPT
private static int	ACTION_ALL
(package private) int	action_mask The actions mask.
(package private) static int	ACTION_NONE
private java.lang.String	actions The actions in canonical form.
static java.lang.String	ADAPT The action string initiate.
(package private) Bundle	bundle The bundle used by this AdaptPermission.
(package private) Filter	filter This holds a Filter matching object used to evaluate the filter in implies.
private java.util.Map<java.lang.String,java.lang.Object>	properties This map holds the properties of the permission, used to match a filter in implies.
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
AdaptPermission(Filter filter, int mask) Package private constructor used by AdaptPermissionCollection.
AdaptPermission(java.lang.String adaptClass, Bundle adaptableBundle, java.lang.String actions) Creates a new requested AdaptPermission object to be used by the code that must perform checkPermission.
AdaptPermission(java.lang.String filter, java.lang.String actions) Creates a new granted AdaptPermission object.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Determines the equality of two AdaptPermission objects.
java.lang.String	getActions() Returns the canonical string representation of the AdaptPermission actions.
private java.util.Map<java.lang.String,java.lang.Object>	getProperties() Called by implies(Permission).
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.
(package private) boolean	implies0(AdaptPermission requested, int effective) Internal implies method.
java.security.PermissionCollection	newPermissionCollection() Returns a new PermissionCollection object suitable for storing AdaptPermission objects.
private static int	parseActions(java.lang.String actions) Parse action string into action mask.
private static Filter	parseFilter(java.lang.String filterString) Parse filter string into a Filter object.
private void	readObject(java.io.ObjectInputStream s) readObject is called to restore the state of this permission from a stream.
private void	setTransients(Filter filter, int mask) Called by constructors and when deserialized.
private void	writeObject(java.io.ObjectOutputStream s) WriteObject is called to save the state of this permission object to a stream.

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

serialVersionUID

private static final long serialVersionUID

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Constant Field Values

ADAPT

public static final java.lang.String ADAPT

The action string initiate.

See Also:

Constant Field Values

ACTION_ADAPT

private static final int ACTION_ADAPT

See Also:

Constant Field Values

ACTION_ALL

private static final int ACTION_ALL

See Also:

Constant Field Values

ACTION_NONE

static final int ACTION_NONE

See Also:

Constant Field Values

action_mask

transient int action_mask

The actions mask.

actions

private volatile java.lang.String actions

The actions in canonical form.

bundle

final transient Bundle bundle

The bundle used by this AdaptPermission.

filter

transient Filter filter

This holds a Filter matching object used to evaluate the filter in implies.

properties

private transient volatile java.util.Map<java.lang.String,java.lang.Object> properties

This map holds the properties of the permission, used to match a filter in implies. This is not initialized until necessary, and then cached in this object.

Constructor Detail

AdaptPermission

public AdaptPermission(java.lang.String filter,
                       java.lang.String actions)

Creates a new granted AdaptPermission object. This constructor must only be used to create a permission that is going to be checked.

Examples:

 (adaptClass=com.acme.*)
 (&(signer=\*,o=ACME,c=US)(adaptClass=com.acme.*))
 (signer=\*,o=ACME,c=US)
 

When a signer key is used within the filter expression the signer value must escape the special filter chars ('*', '(', ')').

The name is specified as a filter expression. The filter gives access to the following attributes:

• signer - A Distinguished Name chain used to sign the exporting bundle. Wildcards in a DN are not matched according to the filter string rules, but according to the rules defined for a DN chain.
• location - The location of the exporting bundle.
• id - The bundle ID of the exporting bundle.
• name - The symbolic name of the exporting bundle.
• adaptClass - The name of the type to which an object can be adapted.

Filter attribute names are processed in a case sensitive manner.

Parameters:

filter - A filter expression. Filter attribute names are processed in a case sensitive manner. A special value of "*" can be used to match all adaptations.

actions - adapt.

Throws:

java.lang.IllegalArgumentException - If the filter has an invalid syntax.

AdaptPermission

public AdaptPermission(java.lang.String adaptClass,
                       Bundle adaptableBundle,
                       java.lang.String actions)

Creates a new requested AdaptPermission object to be used by the code that must perform checkPermission. AdaptPermission objects created with this constructor cannot be added to an AdaptPermission permission collection.

Parameters:

adaptClass - The name of the type to which an object can be adapted.

adaptableBundle - The bundle associated with the object being adapted.

actions - adapt.

AdaptPermission

AdaptPermission(Filter filter,
                int mask)

Package private constructor used by AdaptPermissionCollection.

Parameters:

filter - name filter

mask - action mask

Method Detail

setTransients

private void setTransients(Filter filter,
                           int mask)

Called by constructors and when deserialized.

Parameters:

filter - Permission's filter or null for wildcard.

mask - action mask

parseActions

private static int parseActions(java.lang.String actions)

Parse action string into action mask.

Parameters:

actions - Action string.

Returns:

action mask.

parseFilter

private static Filter parseFilter(java.lang.String filterString)

Parse filter string into a Filter object.

Parameters:

filterString - The filter string to parse.

Returns:

a Filter for this bundle.

Throws:

java.lang.IllegalArgumentException - If the filter syntax is invalid.

implies

public boolean implies(java.security.Permission p)

Determines if the specified permission is implied by this object.

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

Overrides:

implies in class java.security.BasicPermission

Parameters:

p - The requested permission.

Returns:

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

implies0

boolean implies0(AdaptPermission requested,
                 int effective)

Internal implies method. Used by the implies and the permission collection implies methods.

Parameters:

requested - The requested AdaptPermission which has already be validated as a proper argument. The requested AdaptPermission must not have a filter expression.

effective - The effective actions with which to start.

Returns:

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

getActions

public java.lang.String getActions()

Returns the canonical string representation of the AdaptPermission actions.

Always returns present AdaptPermission actions in the following order: adapt.

Overrides:

getActions in class java.security.BasicPermission

Returns:

Canonical string representation of the AdaptPermission actions.

newPermissionCollection

public java.security.PermissionCollection newPermissionCollection()

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

Overrides:

equals in class java.security.BasicPermission

Parameters:

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

Returns:

true if obj is a AdaptPermission, and has the same name and actions as this AdaptPermission 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.

writeObject

private void writeObject(java.io.ObjectOutputStream s)
                  throws java.io.IOException

WriteObject is called to save the state of this permission object to a stream. The actions are serialized, and the superclass takes care of the name.

Throws:

java.io.IOException

readObject

private void readObject(java.io.ObjectInputStream s)
                 throws java.io.IOException,
                        java.lang.ClassNotFoundException

readObject is called to restore the state of this permission from a stream.

Throws:

java.io.IOException

java.lang.ClassNotFoundException

getProperties

private java.util.Map<java.lang.String,java.lang.Object> getProperties()

Called by implies(Permission). This method is only called on a requested permission which cannot have a filter set.

Returns:

a map of properties for this permission.