spki
Class PrincipalFactory

java.lang.Object
  |
  +--spki.PrincipalFactory

public final class PrincipalFactory

extends Object

SPKI PrincipalFactory utility class.

Version:

$Id: PrincipalFactory.java,v 1.2 2002/07/02 19:31:01 tep Exp $

Author:

Tep Narula <tep@win.trlabs.ca>

See Also:

Principal

Field Summary

private static String

__ME This class's full name.

Constructor Summary

private

PrincipalFactory() Can't instantiate me.

Method Summary

static Principal	getInstance(SExpression sexp) Get an instance of principal from given S-Expression.
static boolean	isPrincipal(SExpression sexp) Check an SExpression to see if it could contain a principal.

Methods inherited from class java.lang.Object

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

Field Detail

__ME

private static final String __ME

This class's full name.

Constructor Detail

PrincipalFactory

private PrincipalFactory()

Can't instantiate me. Thsi is a tool class, we don't want to create an instance!

Method Detail

isPrincipal

public static final boolean isPrincipal(SExpression sexp)

Check an SExpression to see if it could contain a principal. It's a convenient utility function that checks whether the given SExpressions is an SList that has a matching type-name as one of those classes that are considered principal.

Parameters:

sexp - the SExpression to check.

Returns:

true if given SExpression could contain be a principal, false otherwise.

getInstance

public static final Principal getInstance(SExpression sexp)
                                   throws SPKIException,
                                          ParseException

Get an instance of principal from given S-Expression.

Parameters:

sexp - the SExpression to check.

Returns:

an instance of spki.interfaces.Principal.

Throws:

ParseException - if the argument doesn't contain a principal.

SPKIException - if something went wrong.