spki
Class SubjectCapability

java.lang.Object
  |
  +--spki.BaseObj
        |
        +--spki.Subject
              |
              +--spki.SubjectCapability

public class SubjectCapability

extends Subject

SPKI SubjectCapability class.

Formal definitions:

 <subject-cap>:: "(" "subject" <threshold>? <subj-cap-obj> ")" ;
 

Version:

$Id: SubjectCapability.java,v 1.8 2002/06/25 12:48:02 tep Exp $

Author:

Tep Narula <tep@win.trlabs.ca>

See Also:

Subject, SubjCapabilityObj

Field Summary

private static String

__ME This class's full name.

Fields inherited from class spki.Subject

__ME, dirty, MIN_THRESHOLD, reduceonly, SEXP_NAME, subj_obj, subj_obj_sexp, subj_objs, thresh, thresh_scheme, THRESHOLD_SEXP_NAME

Fields inherited from class spki.BaseObj

__ME, cache_sexp, cached_sexp, DEFAULT_HASH_ALG, locked, SEXP_NAME

Constructor Summary

protected	SubjectCapability() Don't use me!
	SubjectCapability(int threshold, Sexp thresh_scheme, Object[] subjects) Create an immutable SubjectCapability object from given threshold and list of subj-cap-objs.
	SubjectCapability(int threshold, Sexp thresh_scheme, SubjCapabilityObj subject) Create an immutable SubjectCapability object from a given threshold value and subj-cap-obj.
	SubjectCapability(SExpression sexp) Create an immutable SubjectCapability object from an S-Expression.

Method Summary

static SubjCapabilityObj

getSubjCapabilityObj(SExpression sexp) Get an instance of a SubjCapabilityObj from given S-Expression.

Methods inherited from class spki.Subject

getSubjACL, getSubjObj, getSubjObjs, getSubjObjsLength, getThreshold, getThresholdSchemeId, rSubjObjs2SExpression, setSubjObj, setThreshold, toSExpression

Methods inherited from class spki.BaseObj

disableSExpressionCaching, enableSExpressionCaching, extractHashAlgId, getCachedSExpression, isLocked, isSListOfType, lock, providerToSPKI, setCachedSExpression, spkiToProvider, toString

Methods inherited from class java.lang.Object

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

Field Detail

__ME

private static final String __ME

This class's full name.

Constructor Detail

SubjectCapability

protected SubjectCapability()

Don't use me!

See Also:

SubjectCapability(SExpression), SubjectCapability(int,Sexp,SubjCapabilityObj)

SubjectCapability

public SubjectCapability(SExpression sexp)
                  throws SPKIException,
                         ParseException

Create an immutable SubjectCapability object from an S-Expression.

See Also:

Subject.Subject(SExpression)

SubjectCapability

public SubjectCapability(int threshold,
                         Sexp thresh_scheme,
                         SubjCapabilityObj subject)
                  throws SPKIException

Create an immutable SubjectCapability object from a given threshold value and subj-cap-obj.

Parameters:

threshold - the optional threshold value, ignored if < MIN_THRESHOLD.

thresh_scheme - the threshold scheme-id, ignored if the threshold argument is ignored.

subject - the subj-cap-obj.

See Also:

Subject.MIN_THRESHOLD, SubjCapabilityObj

SubjectCapability

public SubjectCapability(int threshold,
                         Sexp thresh_scheme,
                         Object[] subjects)
                  throws SPKIException

Create an immutable SubjectCapability object from given threshold and list of subj-cap-objs. For use in the threshold reduction only.

See Also:

Subject.Subject(int,Sexp,Object[])

Method Detail

getSubjCapabilityObj

public static final SubjCapabilityObj getSubjCapabilityObj(SExpression sexp)
                                                    throws ParseException,
                                                           SPKIException

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

Parameters:

sexp - the SExpression containing a SubjCapabilityObj.

Returns:

An object instance implementing SubjCapabilityObj.

Throws:

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

SPKIException - if something went wrong.