? TopicPermission

java.lang.Object
java.security.Permission
org.osgi.service.event.TopicPermission
????????:
Serializable, Guard

public final class TopicPermission extends Permission
A bundle's authority to publish or subscribe to event on a topic.

A topic is a slash-separated string that defines a topic.

For example:

 org/osgi/service/foo/FooEvent/ACTION
 

TopicPermission has two actions: publish and subscribe.

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  • ??????

    • PUBLISH

      public static final String PUBLISH
      The action string publish.
      ????:
    • SUBSCRIBE

      public static final String SUBSCRIBE
      The action string subscribe.
      ????:
  • ???????

    • TopicPermission

      public TopicPermission(String name, String actions)
      Defines the authority to publish and/or subscribe to a topic within the EventAdmin service.

      The name is specified as a slash-separated string. Wildcards may be used. For example:

          org/osgi/service/fooFooEvent/ACTION
          com/isv/*
          *
       

      A bundle that needs to publish events on a topic must have the appropriate TopicPermission for that topic; similarly, a bundle that needs to subscribe to events on a topic must have the appropriate TopicPermssion for that topic.

      ??:
      name - Topic name.
      actions - publish,subscribe (canonical order).
  • ??????

    • implies

      public boolean implies(Permission p)
      Determines if the specified permission is implied by this object.

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

          x/y/*,"publish" -> x/y/z,"publish" is true
          *,"subscribe" -> x/y,"subscribe"   is true
          *,"publish" -> x/y,"subscribe"     is false
          x/y,"publish" -> x/y/z,"publish"   is false
       
      ???:
      implies ??? Permission
      ??:
      p - The target permission to interrogate.
      ??:
      true if the specified TopicPermission action is implied by this object; false otherwise.
    • getActions

      public String getActions()
      Returns the canonical string representation of the TopicPermission actions.

      Always returns present TopicPermission actions in the following order: publish,subscribe.

      ???:
      getActions ??? Permission
      ??:
      Canonical string representation of the TopicPermission actions.
    • newPermissionCollection

      public PermissionCollection newPermissionCollection()
      Returns a new PermissionCollection object suitable for storing TopicPermission objects.
      ??:
      newPermissionCollection ??? Permission
      ??:
      A new PermissionCollection object.
    • equals

      public boolean equals(Object obj)
      Determines the equality of two TopicPermission objects. This method checks that specified TopicPermission has the same topic name and actions as this TopicPermission object.
      ???:
      equals ??? Permission
      ??:
      obj - The object to test for equality with this TopicPermission object.
      ??:
      true if obj is a TopicPermission, and has the same topic name and actions as this TopicPermission object; false otherwise.
    • hashCode

      public int hashCode()
      Returns the hash code value for this object.
      ???:
      hashCode ??? Permission
      ??:
      A hash code value for this object.