com.sun.jini.discovery
Class ClientPermissionChecker

java.lang.Object
  com.sun.jini.discovery.ClientPermissionChecker

All Implemented Interfaces:

ClientSubjectChecker

public class ClientPermissionChecker
extends Object
implements ClientSubjectChecker

Implementation of ClientSubjectChecker that approves or rejects client subjects based on whether or not they have been granted a particular permission.

Since:

2.0

Author:

Sun Microsystems, Inc.

Constructor Summary

ClientPermissionChecker(Permission permission)
Creates instance that checks if client subjects have been granted the specified permission.

Method Summary

void	checkClientSubject(Subject subject) Checks whether or not to permit exchanging or accepting data with/from a client authenticated as the given subject, by testing if the subject has been granted the permission that this instance was constructed with.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ClientPermissionChecker

public ClientPermissionChecker(Permission permission)

Creates instance that checks if client subjects have been granted the specified permission.

Parameters:

permission - the permission to use in client subject checks

Throws:

NullPointerException - if permission is null

Method Detail

checkClientSubject

public void checkClientSubject(Subject subject)

Checks whether or not to permit exchanging or accepting data with/from a client authenticated as the given subject, by testing if the subject has been granted the permission that this instance was constructed with. If a security manager is installed, a ProtectionDomain is constructed with an empty CodeSource (null location and certificates), null permissions, null class loader, and the principals from the given client subject (if any), and the implies method of that protection domain is invoked with the specified permission. If true is returned, this method returns normally, otherwise a SecurityException is thrown. If no security manager is installed, this method returns normally. The given client subject must be read-only if non-null.

Specified by:

checkClientSubject in interface ClientSubjectChecker

Parameters:

subject - the client subject to check

Throws:

SecurityException - if the client subject check fails

IllegalArgumentException - if the given subject is not read-only