;;;; in Text, HTML, and XML formats. This includes hyperlinking
;;;; capability and sub-objects.
;;;;
-;;;; $Id: mop.lisp,v 1.11 2002/12/13 08:25:45 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
;;;;
(version :initarg :version :initform nil
:accessor version
:documentation "Version number for class")
- (sql-name :initarg :table-name :initform nil)
+ (sql-name :initarg :sql-name :initform nil)
;;; The remainder of these fields are calculated one time
;;; in finalize-inheritence.
"List of fields that contain a list of subobjects objects.")
(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)
(views :type list :initform nil :initarg :views :accessor views
:documentation "List of views")
- (default-view :initform nil :initarg :default-view :accessor default-view
- :documentation "The default view for a class")
+ (rules :type list :initform nil :initarg :rules :accessor rules
+ :documentation "List of rules")
)
(:documentation "Metaclass for Markup Language classes."))
(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 (intern-in-keyword (slot-value dsd 'type)))
- (sql-type (ho-type-to-sql-type ho-type))
- (length (when (consp ho-type) (cadr ho-type))))
- #+allergo (declare (ignore name))
- (setf (slot-value dsd 'ho-type) ho-type)
- (setf (slot-value dsd 'sql-type) sql-type)
- (setf (slot-value dsd 'type) (ho-type-to-lisp-type ho-type))
- (let ((ia (compute-effective-slot-definition-initargs
- cl #+lispworks name dsds)))
- (apply
- #'make-instance 'hyperobject-esd
- :ho-type ho-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)
- ia))))
-
-(defun ho-type-to-lisp-type (ho-type)
- (when (consp ho-type)
- (setq ho-type (car ho-type)))
- (check-type ho-type symbol)
- (case ho-type
- ((or :string :cdata :varchar :char)
+ (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)
'boolean)
(:integer
'integer)
- ((or :float :single-float)
+ ((:float :single-float)
'single-float)
(:double-float
'double-float)
- (nil
- t)
(otherwise
- ho-type)))
-
-(defun ho-type-to-sql-type (ho-type)
- (when (consp ho-type)
- (setq ho-type (car ho-type)))
- (check-type ho-type symbol)
- (case ho-type
- ((or :string :cdata)
- 'string)
- (:fixnum
- 'integer)
- (:boolean
- 'boolean)
- (:integer
- 'integer)
- ((or :float :single-float)
- 'single-float)
- (:double-float
- 'double-float)
- (nil
- t)
- (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
(finalize-views cl)
(finalize-hyperlinks cl)
(finalize-sql cl)
+ (finalize-rules cl)
(finalize-documentation cl))
(defun hyperobject-class-fields (obj)
(class-slots (class-of obj)))
+;;; 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))
projects / hyperobject.git / blobdiff