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Class semper.access.BoundedCapabilityInstance

java.lang.Object
   |
   +----semper.access.CapabilityInstance
           |
           +----semper.access.BoundedCapabilityInstance

public class BoundedCapabilityInstance

extends CapabilityInstance

Implementation of the bounded capability instance. Bounded capabilities are always only enabled for a limited amount of time (their timeout), after which they can be enabled by the user without authentication.

Version:

$Revision: 1.1 $ $Date: 1996/11/20 15:47:26 $

Author:

Jaap-Henk Hoepman ([email protected])

See Also:

CapabilityInstance, BoundedCapability

BoundedCapabilityInstance(BoundedCapability, AccessControlHandle)

Create a new BoundedCapability instance.

enable()

Enable this capability instance

getInfo()

Obtain a short string describing the capability instance and its parameters.

isEnabled()

Check whether the capability is still enabled.

 public BoundedCapabilityInstance(BoundedCapability template,
                                  AccessControlHandle owner)

Create a new BoundedCapability instance.

The value for the timeout is taken from the preferences.

Parameters:

template - the template for this instance

owner - AccessControlHandle of the owner of the instance.

 public final String getInfo()

Obtain a short string describing the capability instance and its parameters.

Useful for logging.

Returns:

A short string describing the capability instance.

Overrides:

getInfo in class CapabilityInstance

 protected boolean isEnabled()

Check whether the capability is still enabled. When called for the first time, the user is asked to enter a password. On subsequent calls the previously entered password remains valid until it expires after the timeout found in the preferences. If that happens the user must enter the password again.

Returns:

true if the capability is enabled, false if not.

Overrides:

isEnabled in class CapabilityInstance

See Also:

Capability

 public final boolean enable()

Enable this capability instance

Overrides:

enable in class CapabilityInstance

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