Package org.osgi.framework

Class ServicePermission

  • All Implemented Interfaces:
    Serializable, Guard
    public final class ServicePermission
extends BasicPermission
    A bundle's authority to register or get a service.
    • The register action allows a bundle to register a service on the specified names.
    • The get action allows a bundle to detect a service and get it.
    Permission to get a service is required in order to detect events regarding the service. Untrusted bundles should not be able to detect the presence of certain services unless they have the appropriate ServicePermission to get the specific service.
    See Also:
    Serialized Form

    • Constructor Detail

      • ServicePermission

        public ServicePermission​(String name,
                         String actions)
        Create a new ServicePermission.

        The name of the service is specified as a fully qualified class name. Wildcards may be used. 

         name ::= <class name> | <class name ending in ".*"> | *
        Examples: 
         org.osgi.service.http.HttpService
 org.osgi.service.http.*
 *
        For the get action, the name can also be a filter expression. The filter gives access to the service properties as well as the following attributes:
        • signer - A Distinguished Name chain used to sign the bundle publishing the service. 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 bundle publishing the service.
        • id - The bundle ID of the bundle publishing the service.
        • name - The symbolic name of the bundle publishing the service.
        Since the above attribute names may conflict with service property names used by a service, you can prefix an attribute name with '@' in the filter expression to match against the service property and not one of the above attributes. Filter attribute names are processed in a case sensitive manner unless the attribute references a service property. Service properties names are case insensitive.

        There are two possible actions: get and register. The get permission allows the owner of this permission to obtain a service with this name. The register permission allows the bundle to register a service under that name.

        Parameters:
        name - The service class name
        actions - get,register (canonical order)
        Throws:
        IllegalArgumentException - If the specified name is a filter expression and either the specified action is not get or the filter has an invalid syntax.

      • ServicePermission

        public ServicePermission​(ServiceReference<?> reference,
                         String actions)
        Creates a new requested ServicePermission object to be used by code that must perform checkPermission for the get action. ServicePermission objects created with this constructor cannot be added to a ServicePermission permission collection.
        Parameters:
        reference - The requested service.
        actions - The action get.
        Throws:
        IllegalArgumentException - If the specified action is not get or reference is null.
        Since:
        1.5

    • Method Detail

      • implies

        public boolean implies​(Permission p)
        Determines if a ServicePermission object "implies" the specified permission.
        Overrides:
        implies in class BasicPermission
        Parameters:
        p - The target permission to check.
        Returns:
        true if the specified permission is implied by this object; false otherwise.

      • getActions

        public String getActions()
        Returns the canonical string representation of the actions. Always returns present actions in the following order: get, register.
        Overrides:
        getActions in class BasicPermission
        Returns:
        The canonical string representation of the actions.

      • newPermissionCollection

        public PermissionCollection newPermissionCollection()
        Returns a new PermissionCollection object for storing ServicePermission objects.
        Overrides:
        newPermissionCollection in class BasicPermission
        Returns:
        A new PermissionCollection object suitable for storing ServicePermission objects.

      • equals

        public boolean equals​(Object obj)
        Determines the equality of two ServicePermission objects. Checks that specified object has the same class name and action as this ServicePermission.
        Overrides:
        equals in class BasicPermission
        Parameters:
        obj - The object to test for equality.
        Returns:
        true if obj is a ServicePermission, and has the same class name and actions as this ServicePermission object; false otherwise.

      • hashCode

        public int hashCode()
        Returns the hash code value for this object.
        Overrides:
        hashCode in class BasicPermission
        Returns:
        Hash code value for this object.