;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Apr 2000
;;;;
-;;;; $Id: attrib-class.lisp,v 1.4 2002/10/10 16:23:48 kevin Exp $
+;;;; $Id: attrib-class.lisp,v 1.13 2003/04/29 09:23:56 kevin Exp $
;;;;
;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
(in-package :kmrcl)
-(defclass attributes-dsd (mop::standard-direct-slot-definition)
- ((attributes :initarg :attributes :initform nil
- :accessor attributes)))
-
-(defclass attributes-esd (mop::standard-effective-slot-definition)
- ((attributes :initarg :attributes :initform nil
- :accessor slot-definition-attributes)))
-
-
-(defclass attributes-class (mop::standard-class)
+(defclass attributes-class (kmr-mop:standard-class)
()
- )
+ (:documentation "metaclass that implements attributes on slots. Based
+on example from AMOP"))
+
+(defclass attributes-dsd (kmr-mop:standard-direct-slot-definition)
+ ((attributes :initarg :attributes :initform nil
+ :accessor dsd-attributes)))
-(defmethod mop::direct-slot-definition-class ((cl attributes-class)
- &rest iargs &key attributes)
- (declare (ignorable attributes))
-;; (format t "attributes:~s iargs:~s~%" attributes iargs)
- (find-class 'attributes-dsd))
+(defclass attributes-esd (kmr-mop:standard-effective-slot-definition)
+ ((attributes :initarg :attributes :initform nil
+ :accessor esd-attributes)))
+;; encapsulating macro for Lispworks
+(kmr-mop:process-slot-option attributes-class :attributes)
-(defmethod mop::compute-effective-slot-definition :around
- ((cl attributes-class) slot dsds)
- (declare (ignorable slot))
- (apply
- #'make-instance 'attributes-esd
- :attributes (remove-duplicates (mapappend #'attributes dsds))
- (excl::compute-effective-slot-definition-initargs cl dsds))
- )
+#+(or cmu scl sbcl)
+(defmethod kmr-mop:validate-superclass ((class attributes-class)
+ (superclass kmr-mop:standard-class))
+ t)
+(defmethod kmr-mop:direct-slot-definition-class ((cl attributes-class) #+kmr-normal-dsdc &rest initargs)
+ (declare (ignore initargs))
+ (kmr-mop:find-class 'attributes-dsd))
-#+ignore
-(defmethod mop::compute-effective-slot-definition ((cl attributes-class) slot dsds)
- (declare (ignorable slot))
- (let ((normal-slot (call-next-method)))
- (setf (slot-definition-attributes normal-slot)
- (remove-duplicates
- (mapappend #'slot-definition-attributes dsds)))
- normal-slot))
+(defmethod kmr-mop:effective-slot-definition-class ((cl attributes-class) #+kmr-normal-dsdc &rest initargs)
+ (declare (ignore initargs))
+ (kmr-mop:find-class 'attributes-esd))
+(defmethod kmr-mop:compute-effective-slot-definition :around
+ ((cl attributes-class) #+kmr-normal-cesd name dsds)
+ #+kmr-normal-cesd (declare (ignore name))
+ (let ((esd (call-next-method)))
+ (setf (esd-attributes esd) (remove-duplicates (mapappend #'dsd-attributes dsds)))
+ esd))
-(defmethod mop::compute-slots ((class attributes-class))
+(defmethod kmr-mop:compute-slots ((class attributes-class))
(let* ((normal-slots (call-next-method))
- (alist
- (mapcar
- #'(lambda (slot)
- (let ((attr-list (mapcar #'(lambda (attr) (cons attr nil))
- (slot-definition-attributes slot))))
- (when attr-list
- (cons (mop::slot-definition-name slot) attr-list))))
- normal-slots)))
- (setq alist (delete nil alist))
- (cons (mop::make-instance 'mop::standard-effective-slot-definition
- :name 'all-attributes
- :initform `',alist
- :initfunction #'(lambda () alist))
- normal-slots)))
+ (alist (delete
+ nil
+ (mapcar
+ #'(lambda (slot)
+ (let ((attr-list (mapcar #'(lambda (attr) (list attr))
+ (esd-attributes slot))))
+ (when attr-list
+ (cons (kmr-mop:slot-definition-name slot) attr-list))))
+ normal-slots))))
+ (let ((attrib-slot (make-instance 'attributes-esd
+ :name 'all-attributes
+ :initform `',alist
+ :initfunction #'(lambda () alist)
+ :allocation :instance
+ :class class
+ :documentation ""
+ :type t
+ ;; This is an attempted work-around -- lispworks doesn't work
+ ;; it appears to setup storage someplace
+ #+lispworks :location #+lispworks (length normal-slots)
+ )))
+ (append normal-slots (list attrib-slot)))))
(defun slot-attribute (instance slot-name attribute)
(cdr (slot-attribute-bucket instance slot-name attribute)))
slot-name instance attribute))
attr-bucket)))
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (export '(attributes-class slot-attributes)))
-#||
-(in-package :kmrcl)
-
-(defclass credit-rating ()
- ((level :attributes (date-set time-set))
- (id :attributes (person-setting)))
- (:metaclass kmrcl:attributes-class))
-(defparameter cr (make-instance 'credit-rating))
-
-(format t "~&date-set: ~a" (slot-attribute cr 'level 'date-set))
-(setf (slot-attribute cr 'level 'date-set) "12/15/1990")
-(format t "~&date-set: ~a" (slot-attribute cr 'level 'date-set))
-
-(defclass monitored-credit-rating (credit-rating)
- ((level :attributes (last-checked interval date-set))
- (cc :initarg :cc)
- (id :attributes (verified))
- )
- (:metaclass attributes-class))
-(defparameter mcr (make-instance 'monitored-credit-rating))
-
-(setf (slot-attribute mcr 'level 'date-set) "01/05/2002")
-(format t "~&date-set for mcr: ~a" (slot-attribute mcr 'level 'date-set))
-
-||#
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