spki
Class LocObjFactory

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

public final class LocObjFactory

extends Object

SPKI LocObjFactory utilityclass.

Version:

$Id: LocObjFactory.java,v 1.1 2002/06/24 18:07:41 tep Exp $

Author:

Tep Narula <tep@win.trlabs.ca>

See Also:

LocObj

Field Summary

private static String

__ME This class's full name.

Constructor Summary

private

LocObjFactory() Can't instantiate me.

Method Summary

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

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

LocObjFactory

private LocObjFactory()

Can't instantiate me. This is a tool class, we don't want a constructor!

Method Detail

getInstance

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

Get an instance of a LocObj from given S-Expression.

Parameters:

sexp - the SExpression containing a LocObj.

Returns:

An object instance implementing LocObj.

Throws:

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

SPKIException - if something went wrong.

isLocObj

public static final boolean isLocObj(SExpression sexp)

Check an SExpression to see if it could contain a LocObj. 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 implementing the LocObj interface.

Returns:

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