;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
-;;;; Name: hyperobject.lisp
-;;;; Purpose: Hyper Object Metaclass
+;;;; Name: mop.lisp
+;;;; Purpose: Metaobject Protocol Interface
;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Apr 2000
;;;;
;;;; in Text, HTML, and XML formats. This includes hyperlinking
;;;; capability and sub-objects.
;;;;
-;;;; $Id: mop.lisp,v 1.1 2002/11/29 04:07:52 kevin Exp $
+;;;; $Id: mop.lisp,v 1.16 2002/12/14 21:52:48 kevin Exp $
;;;;
;;;; This file is Copyright (c) 2000-2002 by Kevin M. Rosenberg
;;;;
(in-package :hyperobject)
(eval-when (:compile-toplevel :execute)
- (declaim (optimize (speed 3) (safety 1) (compilation-speed 0) (debug 3))))
-
-(eval-when (:compile-toplevel :load-toplevel :execute)
- (shadowing-import
- #+allegro
- `(mop::class-slots mop::slot-definition-name mop:finalize-inheritance
- mop::standard-direct-slot-definition mop::standard-effective-slot-definition
- mop:direct-slot-definition-class mop:compute-effective-slot-definition
- excl::compute-effective-slot-definition-initargs)
- #+lispworks
- `(clos:class-slots clos::slot-definition-name clos:finalize-inheritance
- clos::standard-direct-slot-definition clos::standard-effective-slot-definition
- clos:direct-slot-definition-class clos:compute-effective-slot-definition
- clos::compute-effective-slot-definition-initargs)
- #+sbcl
- `(sb-pcl:class-of sb-pcl:class-name sb-pcl:class-slots sb-pcl::standard-class
- sb-pcl::slot-definition-name sb-pcl:finalize-inheritance
- sb-pcl::standard-direct-slot-definition
- sb-pcl::standard-effective-slot-definition sb-pcl::validate-superclass
- sb-pcl:direct-slot-definition-class sb-pcl:compute-effective-slot-definition
- sb-pcl::compute-effective-slot-definition-initargs)
- #+cmu
- `(pcl:class-of pcl:class-name pcl:class-slots pcl::standard-class
- pcl::slot-definition-name pcl:finalize-inheritance
- pcl::standard-direct-slot-definition pcl::standard-effective-slot-definition
- pcl::validate-superclass pcl:direct-slot-definition-class
- pcl:compute-effective-slot-definition
- pcl::compute-effective-slot-definition-initargs)
- #+scl
- `(class-of class-name clos:class-slots clos::standard-class
- clos::slot-definition-name clos:finalize-inheritance
- clos::standard-direct-slot-definition clos::standard-effective-slot-definition
- clos::validate-superclass clos:direct-slot-definition-class
- clos:compute-effective-slot-definition
- clos::compute-effective-slot-definition-initargs)
-
- :hyperobject))
-
+ (declaim (optimize (speed 2) (safety 2) (compilation-speed 0) (debug 2))))
;; Main class
(defclass hyperobject-class (standard-class)
( ;; slots initialized in defclass
- (title :initarg :title :type string :initform nil
- :documentation "Print Title for class")
- (print-slots :initarg :print-slots :type list :initform nil
- :documentation "List of slots to print")
+ (user-name :initarg :user-name :type string :initform nil
+ :accessor user-name
+ :documentation "User name for class")
+ (default-print-slots :initarg :default-print-slots :type list :initform nil
+ :accessor default-print-slots
+ :documentation "Defaults slots for a view")
(description :initarg :description :initform nil
+ :accessor description
:documentation "Class description")
(version :initarg :version :initform nil
- :documentation "Version number for class")
+ :accessor version
+ :documentation "Version number for class")
+ (sql-name :initarg :sql-name :initform nil)
;;; The remainder of these fields are calculated one time
;;; in finalize-inheritence.
- (subobjects :initform nil :documentation
+ (subobjects :initform nil :accessor subobjects
+ :documentation
"List of fields that contain a list of subobjects objects.")
- (references :type list :initform nil :documentation
- "List of fields that have references")
- (class-id :type integer :initform nil :documentation
- "Unique ID for the class")
-
- (value-func :initform nil :type function)
- (xmlvalue-func :initform nil :type function)
- (fmtstr-text :initform nil :type string)
- (fmtstr-html :initform nil :type string)
- (fmtstr-xml :initform nil :type string)
- (fmtstr-text-labels :initform nil :type string)
- (fmtstr-html-labels :initform nil :type string)
- (fmtstr-xml-labels :initform nil :type string)
- (fmtstr-html-ref :initform nil :type string)
- (fmtstr-xml-ref :initform nil :type string)
- (fmtstr-html-ref-labels :initform nil :type string)
- (fmtstr-xml-ref-labels :initform nil :type string)
+ (hyperlinks :type list :initform nil :accessor hyperlinks
+ :documentation "List of fields that have hyperlinks")
+ (direct-rules :type list :initform nil :initarg :direct-rules
+ :accessor direct-rules
+ :documentation "List of rules to fire on slot changes.")
+ (class-id :type integer :initform nil
+ :accessor class-id
+ :documentation "Unique ID for the class")
+ (default-view :initform nil :initarg :default-view :accessor default-view
+ :documentation "The default view for a class")
+
+ ;; SQL commands
+ (create-table-cmd :initform nil :reader create-table-cmd)
+ (create-indices-cmds :initform nil :reader create-index-cmds)
+ (drop-table-cmd :initform nil :reader drop-table-cmd)
+
+ (views :type list :initform nil :initarg :views :accessor views
+ :documentation "List of views")
+ (rules :type list :initform nil :initarg :rules :accessor rules
+ :documentation "List of rules")
)
(:documentation "Metaclass for Markup Language classes."))
(defclass subobject ()
- ((name :type symbol :initform nil :initarg :name :reader name)
- (reader :type function :initform nil :initarg :reader :reader reader)))
+ ((name-class :type symbol :initform nil :initarg :name-class :reader name-class)
+ (name-slot :type symbol :initform nil :initarg :name-slot :reader name-slot)
+ (lookup :type symbol :initform nil :initarg :lookup :reader lookup)
+ (lookup-keys :type list :initform nil :initarg :lookup-keys
+ :reader lookup-keys))
+ (:documentation "Contains subobject information"))
+
(defmethod print-object ((obj subobject) (s stream))
(print-unreadable-object (obj s :type t :identity t)
(format s "~S" (name obj))))
-(defclass reference ()
+(defclass hyperlink ()
((name :type symbol :initform nil :initarg :name :reader name)
(lookup :type function :initform nil :initarg :lookup :reader lookup)
(link-parameters :type list :initform nil :initarg :link-parameters
:reader link-parameters)))
-(defmethod print-object ((obj reference) (s stream))
+(defmethod print-object ((obj hyperlink) (s stream))
(print-unreadable-object (obj s :type t :identity t)
(format s "~S" (name obj))))
t)
(defmethod finalize-inheritance :after ((cl hyperobject-class))
- (init-hyperobject-class cl))
+ (init-hyperobject-class cl)
+ )
;; Slot definitions
(defmethod direct-slot-definition-class ((cl hyperobject-class)
(declare (ignore slot-name))
)
- (defparameter *class-options*
- '(:title :print-slots :description :version :sql-name)
- "List of class options for hyperobjects.")
- (defparameter *slot-options*
- '(:print-formatter :subobject :reference :description :unique :sql-name)
- "List of slot options that can appear as an initarg")
- (defparameter *slot-options-no-initarg*
- '(:ho-type)
- "List of slot options that do not have an initarg")
-
(dolist (option *class-options*)
(eval `(process-class-option ,option)))
(dolist (option *slot-options*)
`(,(intern (symbol-name x))
:initarg
,(intern (symbol-name x) (symbol-name :keyword))
- :initform nil))
+ :initform nil
+ :accessor
+ ,(intern (concatenate 'string
+ (symbol-name :dsd-)
+ (symbol-name x)))))
*slot-options*))))
(eval
`(defclass hyperobject-esd (standard-effective-slot-definition)
`(,(intern (symbol-name x))
:initarg
,(intern (symbol-name x) (symbol-name :keyword))
- :initform nil))
- (append *slot-options* *slot-options-no-initarg*)))))
+ :initform nil
+ :accessor
+ ,(intern (concatenate 'string
+ (symbol-name :esd-)
+ (symbol-name x)))))
+ (append *slot-options* *slot-options-no-initarg*)))))
) ;; eval-when
-
-(defmethod compute-effective-slot-definition :around
- ((cl hyperobject-class) #+(or allegro lispworks) name dsds)
+
+(defun intern-in-keyword (obj)
+ (cond
+ ((null obj)
+ nil)
+ ((eq t obj)
+ t)
+ ((atom obj)
+ (intern (symbol-name obj) (find-package 'keyword)))
+ ((consp obj)
+ (cons (intern-in-keyword (car obj) ) (intern-in-keyword (cdr obj))))
+ (t
+ obj)))
+
+(defun canonicalize-value-type (vt)
+ (typecase vt
+ (atom
+ (ensure-keyword vt))
+ (cons
+ (cons (ensure-keyword (car vt)) (cdr vt)))
+ (t
+ t)))
+
+(defmethod compute-effective-slot-definition :around ((cl hyperobject-class)
+ #+(or allegro lispworks) name
+ dsds)
#+allergo (declare (ignore name))
(let* ((dsd (car dsds))
- (ho-type (slot-value dsd 'type)))
- (setf (slot-value dsd 'ho-type) ho-type)
- (setf (slot-value dsd 'type) (convert-ho-type ho-type))
- (let ((ia (compute-effective-slot-definition-initargs
- cl #+lispworks name dsds)))
- (apply
- #'make-instance 'hyperobject-esd
- :ho-type ho-type
- :print-formatter (slot-value dsd 'print-formatter)
- :subobject (slot-value dsd 'subobject)
- :reference (slot-value dsd 'reference)
- :description (slot-value dsd 'description)
- ia)))
- )
-
-(defun convert-ho-type (ho-type)
- (check-type ho-type symbol)
- (case (intern (symbol-name ho-type) (symbol-name :keyword))
- (:string
+ (value-type (canonicalize-value-type (slot-value dsd 'value-type))))
+ (multiple-value-bind (sql-type length) (value-type-to-sql-type value-type)
+ (setf (slot-value dsd 'sql-type) sql-type)
+ (setf (slot-value dsd 'type) (value-type-to-lisp-type value-type))
+ (let ((ia (compute-effective-slot-definition-initargs
+ cl #+lispworks name dsds)))
+ (apply
+ #'make-instance 'hyperobject-esd
+ :value-type value-type
+ :sql-type sql-type
+ :length length
+ :print-formatter (slot-value dsd 'print-formatter)
+ :subobject (slot-value dsd 'subobject)
+ :hyperlink (slot-value dsd 'hyperlink)
+ :hyperlink-parameters (slot-value dsd 'hyperlink-parameters)
+ :description (slot-value dsd 'description)
+ :user-name (slot-value dsd 'user-name)
+ :index (slot-value dsd 'index)
+ :value-constraint (slot-value dsd 'value-constraint)
+ :null-allowed (slot-value dsd 'null-allowed)
+ ia)))))
+
+(defun value-type-to-lisp-type (value-type)
+ (case (if (atom value-type)
+ value-type
+ (car value-type))
+ ((:string :cdata :varchar :char)
'string)
+ (:character
+ 'character)
(:fixnum
'fixnum)
(:boolean
'boolean)
(:integer
'integer)
- (:cdata
- 'string)
- (:float
- 'float)
- (:nil
- t)
+ ((:float :single-float)
+ 'single-float)
+ (:double-float
+ 'double-float)
(otherwise
- ho-type)))
+ t)))
+
+(defun value-type-to-sql-type (value-type)
+ "Return two values, the sql type and field length."
+ (let ((type (if (atom value-type)
+ value-type
+ (car value-type)))
+ (length (when (consp value-type)
+ (cadr value-type))))
+ (values
+ (case type
+ ((:string :cdata)
+ :string)
+ ((:fixnum :integer)
+ :integer)
+ (:boolean
+ :boolean)
+ ((:float :single-float)
+ :single-float)
+ (:double-float
+ :double-float)
+ (otherwise
+ :text))
+ length)))
;;;; Class initialization function
-(defun find-slot-by-name (cl name)
- (find name (class-slots cl) :key #'slot-definition-name))
-
-
-(defun process-subobjects (cl)
+;; defines a slot-unbound method for class and slot-name, fills
+;; the slot by calling reader function with the slot values of
+;; the instance's reader-keys
+(defmacro def-lazy-reader (class slot-name reader &rest reader-keys)
+ (let* ((the-slot-name (gensym))
+ (the-class (gensym))
+ (the-instance (gensym))
+ (keys '()))
+ (dolist (key reader-keys)
+ (push (list 'slot-value the-instance (list 'quote key)) keys))
+ (setq keys (nreverse keys))
+ `(defmethod slot-unbound (,the-class (,the-instance ,class)
+ (,the-slot-name (eql ',slot-name)))
+ (declare (ignore ,the-class))
+ (setf (slot-value ,the-instance ,the-slot-name)
+ (,reader ,@keys)))))
+
+(defun finalize-subobjects (cl)
"Process class subobjects slot"
- (setf (slot-value cl 'subobjects)
+ (setf (subobjects cl)
(let ((subobjects '()))
(dolist (slot (class-slots cl))
- (when (slot-value slot 'subobject)
- (push (make-instance 'subobject :name (slot-definition-name slot)
- :reader (if (eq t (slot-value slot 'subobject))
- (slot-definition-name slot)
- (slot-value slot 'subobject)))
- subobjects)))
+ (let-when (subobj-def (esd-subobject slot))
+ (let ((subobject (make-instance 'subobject
+ :name-class (class-name cl)
+ :name-slot (slot-definition-name slot)
+ :lookup (if (atom subobj-def)
+ subobj-def
+ (car subobj-def))
+ :lookup-keys (if (atom subobj-def)
+ nil
+ (cdr subobj-def)))))
+ (unless (eq (lookup subobject) t)
+ (eval `(def-lazy-reader ,(name-class subobject)
+ ,(name-slot subobject) ,(lookup subobject)
+ ,@(lookup-keys subobject))))
+ (push subobject subobjects))))
subobjects)))
-(defun process-documentation (cl)
+(defun finalize-documentation (cl)
"Calculate class documentation slot"
- (awhen (slot-value cl 'title)
- (setf (slot-value cl 'title) (car it)))
+ (awhen (slot-value cl 'user-name)
+ (setf (slot-value cl 'user-name)
+ (etypecase (slot-value cl 'user-name)
+ (cons (car it))
+ ((or string symbol) it))))
(awhen (slot-value cl 'description)
- (setf (slot-value cl 'description) (car it)))
-
+ (setf (slot-value cl 'description)
+ (etypecase (slot-value cl 'description)
+ (cons (car it))
+ ((or string symbol) it))))
+
(let ((*print-circle* nil))
(setf (documentation (class-name cl) 'class)
(format nil "Hyperobject~A~A~A~A"
- (aif (slot-value cl 'title)
+ (aif (user-name cl)
(format nil ": ~A" it ""))
- (aif (slot-value cl 'description)
+ (aif (description cl)
(format nil "~%Class description: ~A" it) "")
- (aif (slot-value cl 'subobjects)
- (format nil "~%Subobjects:~{ ~A~}" (mapcar #'name it)) "")
- (aif (slot-value cl 'print-slots)
- (format nil "~%Print-slots:~{ ~A~}" it) "")
+ (aif (subobjects cl)
+ (format nil "~%Subobjects:~{ ~A~}" (mapcar #'name-slot it)) "")
+ (aif (default-print-slots cl)
+ (format nil "~%Default print slots:~{ ~A~}" it) "")
))))
-(defun process-views (cl)
- "Calculate all view slots for a hyperobject class"
- (let ((fmtstr-text "")
- (fmtstr-html "")
- (fmtstr-xml "")
- (fmtstr-text-labels "")
- (fmtstr-html-labels "")
- (fmtstr-xml-labels "")
- (fmtstr-html-ref "")
- (fmtstr-xml-ref "")
- (fmtstr-html-ref-labels "")
- (fmtstr-xml-ref-labels "")
- (first-field t)
- (value-func '())
- (xmlvalue-func '())
- (classname (class-name cl))
- (package (symbol-package (class-name cl)))
- (references nil))
- (declare (ignore classname))
- (check-type (slot-value cl 'print-slots) list)
- (dolist (slot-name (slot-value cl 'print-slots))
- (let ((slot (find-slot-by-name cl slot-name)))
- (unless slot
- (error "Slot ~A is not found in class ~S" slot-name cl))
- (let ((name (slot-definition-name slot))
- (namestr (symbol-name (slot-definition-name slot)))
- (namestr-lower (string-downcase (symbol-name (slot-definition-name slot))))
- (type (slot-value slot 'ho-type))
- (print-formatter (slot-value slot 'print-formatter))
- (value-fmt "~a")
- (plain-value-func nil)
- html-str xml-str html-label-str xml-label-str)
-
- (when (or (eql type :integer) (eql type :fixnum))
- (setq value-fmt "~d"))
-
- (when (eql type :boolean)
- (setq value-fmt "~a"))
-
- (if first-field
- (setq first-field nil)
- (progn
- (string-append fmtstr-text " ")
- (string-append fmtstr-html " ")
- (string-append fmtstr-xml " ")
- (string-append fmtstr-text-labels " ")
- (string-append fmtstr-html-labels " ")
- (string-append fmtstr-xml-labels " ")
- (string-append fmtstr-html-ref " ")
- (string-append fmtstr-xml-ref " ")
- (string-append fmtstr-html-ref-labels " ")
- (string-append fmtstr-xml-ref-labels " ")))
-
- (setq html-str (concatenate 'string "<span class=\"" namestr-lower "\">" value-fmt "</span>"))
- (setq xml-str (concatenate 'string "<" namestr-lower ">" value-fmt "</" namestr-lower ">"))
- (setq html-label-str (concatenate 'string "<span class=\"label\">" namestr-lower "</span> <span class=\"" namestr-lower "\">" value-fmt "</span>"))
- (setq xml-label-str (concatenate 'string "<label>" namestr-lower "</label> <" namestr-lower ">" value-fmt "</" namestr-lower ">"))
-
- (string-append fmtstr-text value-fmt)
- (string-append fmtstr-html html-str)
- (string-append fmtstr-xml xml-str)
- (string-append fmtstr-text-labels namestr-lower " " value-fmt)
- (string-append fmtstr-html-labels html-label-str)
- (string-append fmtstr-xml-labels xml-label-str)
-
- (if (slot-value slot 'reference)
- (progn
- (string-append fmtstr-html-ref "<~~a>" value-fmt "</~~a>")
- (string-append fmtstr-xml-ref "<~~a>" value-fmt "</~~a>")
- (string-append fmtstr-html-ref-labels "<span class=\"label\">" namestr-lower "</span> <~~a>" value-fmt "</~~a>")
- (string-append fmtstr-xml-ref-labels "<label>" namestr-lower "</label> <~~a>" value-fmt "</~~a>")
- (push (make-instance 'reference :name name
- :lookup (slot-value slot 'reference))
- references))
- (progn
- (string-append fmtstr-html-ref html-str)
- (string-append fmtstr-xml-ref xml-str)
- (string-append fmtstr-html-ref-labels html-label-str)
- (string-append fmtstr-xml-ref-labels xml-label-str)))
-
- (if print-formatter
- (setq plain-value-func
- (list `(,print-formatter (slot-value x ',(intern namestr package)))))
- (setq plain-value-func
- (list `(slot-value x ',(intern namestr package)))))
- (setq value-func (append value-func plain-value-func))
-
- (if (eql type :cdata)
- (setq xmlvalue-func (append xmlvalue-func (list `(xml-cdata ,@plain-value-func))))
- (setq xmlvalue-func (append xmlvalue-func plain-value-func)))
- )))
-
- (setf (slot-value cl 'references) references)
-
- (if value-func
- (setq value-func `(lambda (x) (values ,@value-func)))
- (setq value-func `(lambda () (values))))
- (setq value-func (compile nil (eval value-func)))
-
- (if xmlvalue-func
- (setq xmlvalue-func `(lambda (x) (values ,@xmlvalue-func)))
- (setq xmlvalue-func `(lambda () (values))))
- (setq xmlvalue-func (compile nil (eval xmlvalue-func)))
-
- (setf (slot-value cl 'fmtstr-text) fmtstr-text)
- (setf (slot-value cl 'fmtstr-html) fmtstr-html)
- (setf (slot-value cl 'fmtstr-xml) fmtstr-xml)
- (setf (slot-value cl 'fmtstr-text-labels) fmtstr-text-labels)
- (setf (slot-value cl 'fmtstr-html-labels) fmtstr-html-labels)
- (setf (slot-value cl 'fmtstr-xml-labels) fmtstr-xml-labels)
- (setf (slot-value cl 'fmtstr-html-ref) fmtstr-html-ref)
- (setf (slot-value cl 'fmtstr-xml-ref) fmtstr-xml-ref)
- (setf (slot-value cl 'fmtstr-html-ref-labels) fmtstr-html-ref-labels)
- (setf (slot-value cl 'fmtstr-xml-ref-labels) fmtstr-xml-ref-labels)
- (setf (slot-value cl 'value-func) value-func)
- (setf (slot-value cl 'xmlvalue-func) xmlvalue-func))
- (values))
+(defun finalize-hyperlinks (cl)
+ (let ((hyperlinks '()))
+ (dolist (esd (class-slots cl))
+ (awhen (slot-value esd 'hyperlink)
+ (push
+ (make-instance 'hyperlink
+ :name (slot-definition-name esd)
+ :lookup it
+ :link-parameters (slot-value esd 'hyperlink-parameters))
+ hyperlinks)))
+ (setf (slot-value cl 'hyperlinks) hyperlinks)))
(defun init-hyperobject-class (cl)
"Initialize a hyperobject class. Calculates all class slots"
- (process-subobjects cl)
- (process-views cl)
- (process-documentation cl))
-
-(defun hyperobject-class-fmtstr-text (obj)
- (slot-value (class-of obj) 'fmtstr-text))
-
-(defun hyperobject-class-fmtstr-html (obj)
- (slot-value (class-of obj) 'fmtstr-html))
-
-(defun hyperobject-class-fmtstr-xml (obj)
- (slot-value (class-of obj) 'fmtstr-xml))
-
-(defun hyperobject-class-fmtstr-text-labels (obj)
- (slot-value (class-of obj) 'fmtstr-text-labels))
-
-(defun hyperobject-class-fmtstr-html-labels (obj)
- (slot-value (class-of obj) 'fmtstr-html-labels))
+ (finalize-subobjects cl)
+ (finalize-views cl)
+ (finalize-hyperlinks cl)
+ (finalize-sql cl)
+ (finalize-rules cl)
+ (finalize-documentation cl))
-(defun hyperobject-class-fmtstr-xml-labels (obj)
- (slot-value (class-of obj) 'fmtstr-xml-labels))
-(defun hyperobject-class-value-func (obj)
- (slot-value (class-of obj) 'value-func))
+;;;; *************************************************************************
+;;;; Metaclass Slot Accessors
+;;;; *************************************************************************
-(defun hyperobject-class-xmlvalue-func (obj)
- (slot-value (class-of obj) 'xmlvalue-func))
+(defun find-slot-by-name (cl name)
+ (find name (class-slots cl) :key #'slot-definition-name))
-(eval-when (:compile-toplevel :load-toplevel :execute)
- (defun hyperobject-class-title (obj)
- (awhen (slot-value (class-of obj) 'title)
- (if (consp it)
- (car it)
- it))))
+(defun hyperobject-class-user-name (obj)
+ (awhen (user-name (class-of obj))
+ (if (consp it)
+ (car it)
+ it)))
(defun hyperobject-class-subobjects (obj)
- (slot-value (class-of obj) 'subobjects))
+ (subobjects (class-of obj)))
-(defun hyperobject-class-references (obj)
- (slot-value (class-of obj) 'references))
+(defun hyperobject-class-hyperlinks (obj)
+ (hyperlinks (class-of obj)))
(defun hyperobject-class-fields (obj)
(class-slots (class-of obj)))
-(defun hyperobject-class-fmtstr-html-ref (obj)
- (slot-value (class-of obj) 'fmtstr-html-ref))
-
-(defun hyperobject-class-fmtstr-xml-ref (obj)
- (slot-value (class-of obj) 'fmtstr-xml-ref))
-
-(defun hyperobject-class-fmtstr-html-ref-labels (obj)
- (slot-value (class-of obj) 'fmtstr-html-ref-labels))
-
-(defun hyperobject-class-fmtstr-xml-ref-labels (obj)
- (slot-value (class-of obj) 'fmtstr-xml-ref-labels))
-
+;;; Slot accessor and class rules
+
+(defclass rule ()
+ ((name :initarg :name :initform nil :accessor name)
+ (dependants :initarg :dependants :initform nil :accessor dependants)
+ (volatile :initarg :volatile :initform nil :accessor volatile)
+ (access-slots :initarg :access-slots :initform nil :accessor access-slots)
+ (source-code :initarg :source-code :initform nil :accessor source-code)
+ (func :initform nil :initarg :func :accessor func)))
+
+(defun compile-rule (source-code dependants volatile cl)
+ (let ((access (appendnew dependants volatile)))
+ (compile nil
+ (eval
+ `(lambda (obj)
+ (when (every #'(lambda (x) (slot-boundp obj x))
+ (quote ,dependants))
+ (with-slots ,access obj
+ ,@source-code)))))))
+
+(defun finalize-rules (cl)
+ (let* ((direct-rules (direct-rules cl))
+ (rules '()))
+ (dolist (rule direct-rules)
+ (destructuring-bind (name (&key dependants volatile) &rest source-code)
+ rule
+ (setf dependants (mklist dependants)
+ volatile (mklist volatile))
+ (push
+ (make-instance 'rule :name name :dependants dependants
+ :volatile volatile :source-code source-code
+ :access-slots (appendnew dependants volatile)
+ :func (compile-rule
+ source-code dependants volatile cl))
+ rules)))
+ (setf (rules cl) (nreverse rules))))
+
+
+(defun fire-class-rules (cl obj slot)
+ "Fire all class rules. Called after a slot is modified."
+ (let ((name (slot-definition-name slot)))
+ (dolist (rule (rules cl))
+ (when (find name (dependants rule))
+ (cmsg-c :debug "firing rule: ~W" (source-code rule))
+ (funcall (func rule) obj)))))
+
+
+#+ignore
+(defmethod (setf slot-value-using-class)
+ :around (new-value (cl hyperobject-class) obj
+ (slot standard-effective-slot-definition))
+ (call-next-method))
+
+(defmethod (setf slot-value-using-class)
+ :around (new-value (cl hyperobject-class) obj
+ (slot standard-effective-slot-definition))
+ #+ignore
+ (cmsg-c :verbose "Setf slot value: class: ~s, obj: ~s, slot: ~s, value: ~s" cl (class-of obj) slot new-value)
+
+ (let ((func (esd-value-constraint slot)))
+ (cond
+ ((and func (not (funcall func new-value)))
+ (warn "Rejected change to value of slot ~a of object ~a"
+ (slot-definition-name slot) obj)
+ (slot-value obj (slot-definition-name slot)))
+ (t
+ (call-next-method)
+ (when (direct-rules cl)
+ (fire-class-rules cl obj slot))
+ new-value))))
+
+#+ignore
+(defmethod slot-value-using-class :around ((cl hyperobject-class) obj
+ (slot standard-effective-slot-definition))
+ (let ((value (call-next-method)))
+ (cmsg-c :verbose "slot value: class: ~s, obj: ~s, slot: ~s" cl (class-of obj) slot)
+ value))
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