issrg.pba.rbac
Class ExpirableCredentials

java.lang.Object
  issrg.pba.rbac.SubsetCredentials
      issrg.pba.rbac.ExpirableCredentials

All Implemented Interfaces:

Credentials, java.lang.Cloneable

public class ExpirableCredentials
extends SubsetCredentials

This class is intended to provide expiration service, so that any given Credentials are constrained in the time dimension. The objects can embed any Credentials, and ExpirableCredentials will perform expiration checks when intersecting the credentials.

Note that the methods call the inherited methods to ensure that the other types of Credentials are handled correctly, e.g. SetOfSubsetsCredentials are intersected correctly.

Field Summary

protected Credentials	expirable
protected ValidityPeriod	when

Constructor Summary

protected	ExpirableCredentials()
	ExpirableCredentials(Credentials expirable, ValidityPeriod vp) This constructor builds a credential with Validity Period.

Method Summary

java.lang.Object	clone() This method creates a copy of the credentials object.
boolean	contains(Credentials c) This method checks if this ExpirableCredentials contains the other Credentials.
Credentials	getExpirable() This method returns the Credentials embedded inside this object and associated with the ValidityPeriod.
ValidityPeriod	getValidityPeriod() This method returns the ValidityPeriod associated with the embedded Credentials.
Credentials	intersection(Credentials c) This method builds an intersection of this ExpirableCredentials with the given Credentials.
java.lang.String	toString()

Methods inherited from class issrg.pba.rbac.SubsetCredentials

equals, union

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

expirable

protected Credentials expirable

when

protected ValidityPeriod when

Constructor Detail

ExpirableCredentials

protected ExpirableCredentials()

ExpirableCredentials

public ExpirableCredentials(Credentials expirable,
                            ValidityPeriod vp)

This constructor builds a credential with Validity Period. If the credential is used outside the specified period, it will be ignored.

Parameters:

expirable - - the Credentials with which the Validity Period is associated

vp - - the ValidityPeriod of the Credentials; should not be null

Method Detail

contains

public boolean contains(Credentials c)

This method checks if this ExpirableCredentials contains the other Credentials. If it is an ExpirableCredentials, then their embedded Credentials are tested, and the ValidityPeriods are tested separately; otherwise the inherited behaviour of the method determines the result.

Specified by:

contains in interface Credentials

Overrides:

contains in class SubsetCredentials

Parameters:

c - - the Credentials that must be contained in this one

Returns:

true, if the embedded Credentials and the ValidityPeriod of this ExpirableCredentials contain the corresponding components of the given Credentials, if it is ExpirableCredentials; otherwise the inherited contains method is called to test if this ExpirableCredentials contains the given Credentials

See Also:

SetOfSubsetsCredentials

intersection

public Credentials intersection(Credentials c)

This method builds an intersection of this ExpirableCredentials with the given Credentials. If it is an ExpirableCredentials, then the result is the ExpirableCredentials, consisting of the intersection of the embedded Credentials and their ValidityPeriods. Otherwise the inherited intersection method determines the result.

Specified by:

intersection in interface Credentials

Overrides:

intersection in class SubsetCredentials

Parameters:

c - - the Credentials to intersect with

Returns:

Credentials that is the result of intersecting the embedded Credentials and the ValidityPeriods if the given Credentials is an ExpirableCredentials; otherwise, the inherited intersection method determines the result.

getValidityPeriod

public ValidityPeriod getValidityPeriod()

This method returns the ValidityPeriod associated with the embedded Credentials.

getExpirable

public Credentials getExpirable()

This method returns the Credentials embedded inside this object and associated with the ValidityPeriod.

clone

public java.lang.Object clone()

Description copied from class: SubsetCredentials

This method creates a copy of the credentials object. Requires overriding in implementations of subclasses.

Specified by:

clone in interface Credentials

Specified by:

clone in class SubsetCredentials

Returns:

a copy of the credentials object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object