de.fhg.igd.semoa.net.farsight
Class FarSightPermission

java.lang.Object
  java.security.Permission
      de.fhg.igd.util.AbstractPermission
          de.fhg.igd.semoa.net.farsight.FarSightPermission

All Implemented Interfaces:

Guard, Serializable

public class FarSightPermission

extends AbstractPermission

Represents permissions to use FarSight service. FarSight allows to discover SeMoA hosts accross the boundaries of the local intranet, and thereby extends the functionality of Vicinity. This permission restricts the access to FarSight interface for agents. This is especially interesting in the context of the explorer strategies. The target is the regular expression used as key for lookup. The actions are defined as follows

get

get collected host informations from FarSight.

set

update FarSight's host list.

Remark that each host is responsible for its own security. Hence a restrictive permission setting at this host is neither able nor intended to protect any remote host.

Version:

"$Id: FarSightPermission.java 1913 2007-08-08 02:41:53Z jpeters $"

Author:

Jan Peters

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class de.fhg.igd.util.AbstractPermission

AbstractPermission.AbstractPermissionCollection

Field Summary

private static String[]	acronyms_ The list os actions supported by this permission class.
private String	expr_

Fields inherited from class de.fhg.igd.util.AbstractPermission

Fields inherited from class java.security.Permission

Constructor Summary

FarSightPermission(String expr, String actions)
Creates an instance with the given expression and actions.

Method Summary

boolean	equals(Object o) Compares this permission with the given object for equality.
String	getActions()
boolean	implies(Permission p) Returns true if this permission implies the given one.
String	toString()

Methods inherited from class de.fhg.igd.util.AbstractPermission

getActions, getActionsMask, getActionsMask, hashCode, newPermissionCollection, toString

Methods inherited from class java.security.Permission

checkGuard, getName

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

acronyms_

private static String[] acronyms_

The list os actions supported by this permission class.

expr_

private String expr_

Constructor Detail

FarSightPermission

public FarSightPermission(String expr,
                          String actions)

Creates an instance with the given expression and actions.

Parameters:

expr - The target, a regular expression.

actions - The list of actions as describd above.

Method Detail

getActions

public String getActions()

toString

public String toString()

implies

public boolean implies(Permission p)

Description copied from class: AbstractPermission

Returns true if this permission implies the given one. The given permission is implied if:

• p is not null
• both are of the same class
• all actions in permission p are also set in this permission.
• at least one action is defined in p
• the name of this permission is null or it equals the name of p.

If this permission's name is null then any name in p is matched.

Parameters:

p - the Permission which is checked for implication.

Returns:

true iff this Permission implies the given one.

equals

public boolean equals(Object o)

Description copied from class: AbstractPermission

Compares this permission with the given object for equality. This permission equals the given object if:

• o is not null, and it is of the same class as this permission
• the name and actions of this permission equal the name and actions of o.

Equality of names is determined by means of object reference identity or, if that fails, by means of the equals method of this permission's name.

Parameters:

o - The object to test for equality.