;;;; A description is an object which is used
;;;; to describe another object.
-;;; HACK:
-;;; Since i'm not using deflayer, ensure-layer etc,
-;;; There are a few places where contextl gets confused
-;;; trying to locate my description layers.
-
-;;; TODO: investigate switching to deflayer!
-
-(defun contextl::prepare-layer (layer)
- (if (symbolp layer)
- (if (eq (symbol-package layer)
- (find-package :description-definers))
- layer
- (contextl::defining-layer layer))
-
- layer))
-
-(defmethod find-layer-class :around ((layer symbol) &optional errorp environment)
- (if (eq (symbol-package layer)
- (find-package :description-definers))
- (find-class layer)
- (call-next-method)))
;;; #+HACK
;;; I'm having some 'issues' with
attribute))
(defmethod slot-value-using-class ((class description-access-class) object slotd)
- (if (or
+ (call-next-method)
+#+nil (if (or
(eq (slot-definition-name slotd) 'described-object)
(not (slot-boundp slotd 'attribute-object)))
(call-next-method)
(slot-definition-attribute-object slotd)))
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defparameter *description-attributes* (make-hash-table)))
+
+
+
(defclass standard-description-class (description-access-class layered-class)
- ()
+ ((attributes :accessor description-class-attributes :initform (list)))
(:default-initargs :defining-metaclass 'description-access-class))
+
+
(defmethod validate-superclass
((class standard-description-class)
(superclass standard-class))
(defun description-class-name (description-class)
(read-from-string (symbol-name (class-name description-class))))
+
+(defgeneric standard-description-p (description-candidate)
+ (:method (not-description)
+ NIL)
+ (:method ((description standard-description-object))
+ T))
(defun initialize-description-class (class)
+;;; HACK: initialization does not happ en properly
+;;; when compiling and loading or something like that.
+;;; Obviously i'm not sure why.
+;;; So we're going to explicitly initialize things.
+;;; For now. --drewc
+
+ (pushnew class *defined-descriptions*)
+
+;;; ENDHACK.
+
+ (let* ((description (find-layer class))
+ (attribute-objects
+ (setf (description-class-attributes (class-of description))
+ (mapcar
+ (lambda (slot)
+ (or (find-attribute description
+ (slot-definition-name slot))
+ (let* ((*init-time-description* description)
+ (attribute-class (or
+ (ignore-errors
+ (slot-value-using-class
+ (class-of description) description slot))
+ 'standard-attribute))
+ (attribute
+ (apply #'make-instance
+ attribute-class
+ :description description
+ :attribute-class attribute-class
+ (attribute-object-initargs slot))))
+ (setf (slot-definition-attribute-object slot) attribute))))
+ (remove 'described-object (class-slots (class-of description))
+ :key #'slot-definition-name))))
+ (defining-classes
+ (partial-class-defining-classes class)))
+
+ (loop
+ :for (layer class)
+ :on defining-classes :by #'cddr
+ :do (funcall-with-layer-context
+ (adjoin-layer (find-layer layer) (current-layer-context))
+ (lambda ()
+ (loop :for direct-slot :in (class-direct-slots class)
+ :do (let ((attribute
+ (find (slot-definition-name direct-slot)
+ attribute-objects
+ :key #'attribute-name)))
+ (let ((initargs
+ (prepare-initargs attribute (direct-attribute-properties direct-slot))))
+
+ (apply #'reinitialize-instance attribute
+ initargs )
+ (setf (slot-value description (attribute-name attribute))
+ (attribute-class attribute))
+ (apply #'change-class attribute (attribute-class attribute)
+ initargs)))))))))
+
+
+#+old(defun initialize-description-class (class)
+
;;; HACK: initialization does not happ en properly
;;; when compiling and loading or something like that.
;;; Obviously i'm not sure why.
(mapcar
(lambda (slot)
(let* ((*init-time-description* description)
- (attribute (apply #'make-instance
+ (attribute
+ (apply #'make-instance
'standard-attribute
:description description
(attribute-object-initargs slot))))
-
+
(setf (slot-definition-attribute-object slot) attribute)))
(remove 'described-object (class-slots (class-of description))
(apply #'reinitialize-instance attribute
initargs )
+ (warn "Attribute class for ~A is ~A" attribute (attribute-class attribute))
(when (not (eq (find-class (attribute-class attribute))
(class-of attribute)))
+ (warn "~%CHANGING CLASS~%")
(apply #'change-class attribute (attribute-class attribute)
- initargs)))
-
-
- )))))))
+ initargs))))))))))
;;;; HACK: run this at startup till we figure things out.
(defun initialize-descriptions ()