-(in-package :mewa)
-
-(defparameter *default-type* :ucw)
-
-;;; some utilities for merging plists
-
-(defun plist-nunion (new-props plist)
- (loop for cons on new-props by #'cddr
- do (setf (getf plist (first cons)) (second cons))
- finally (return plist)))
-
-(defun plist-union (new-props plist)
- "Non-destructive version of plist-nunion"
- (plist-nunion new-props (copy-list plist)))
-
-
-;;; an alist of model-class-name . attributes
-;;; should really be a hash-table.
-(defvar *attribute-map* (list))
-
-(defun find-or-create-attributes (class-name)
- "return an exisiting class attribute map or create one.
-
-A map is a cons of class-name . attributes.
-attributes is an alist keyed on the attribute name."
- (or (assoc class-name *attribute-map*)
- (progn
- (setf *attribute-map* (acons class-name (list (list)) *attribute-map*))
- (assoc class-name *attribute-map*))))
-
-(defgeneric find-class-attributes (class))
-
-(defmethod find-class-attributes ((model t))
- (find-or-create-attributes (class-name (class-of model))))
-
-(defmethod find-class-attributes ((model symbol))
- (find-or-create-attributes model))
-
-(defmethod clear-class-attributes ((model t))
- (setf (cdr (find-class-attributes model)) nil))
-
-(defmethod add-attribute ((model t) name def)
- (let ((map (find-class-attributes model)))
- (setf (cdr map) (acons name def (cdr map)))))
-
-(defmethod find-attribute ((model t) name)
- (assoc name (cdr (find-class-attributes model))))
-
-(defmethod (setf find-attribute) ((def list) (model t) name)
- (let ((attr (find-attribute model name)))
- (if attr
- (prog2
- (setf (cdr attr) def)
- attr)
- (prog2
- (add-attribute model name def)
- (find-attribute model name)))))
-
-(defmethod set-attribute ((model t) name definition &key (inherit t))
- (setf (find-attribute model name)
- (if inherit
- (cons (car definition)
- (plist-union (cdr definition)
- (cddr (find-attribute model name))))
- definition)))
-
-(defmethod perform-set-attributes ((model t) definitions)
- (dolist (def definitions)
- (funcall #'set-attribute model (first def) (rest def))))
-
-(defmethod set-attribute-properties ((model t) attribute properties)
- (let ((a (find-attribute model attribute)))
- (if a
- (setf (cddr a) (plist-nunion properties (cddr a)))
- (error "Attribute ~A does not exist" attribute) )))
-
-(defmethod perform-set-attribute-properties ((model t) definitions)
- (dolist (def definitions)
- (funcall #'set-attribute-properties model (car def) (cdr def))))
-
-(defmethod perform-define-attributes ((model t) attributes)
- (loop for attribute in attributes
- do (destructuring-bind (name type &rest args)
- attribute
- (cond ((eq type t)
- ;;use the existing (default) type
- (set-attribute-properties model name args))
- ((not (null type))
- ;;set the type as well
- (set-attribute model name (cons type args)))))))
-
-(defmacro define-attributes (models &body attribute-definitions)
- `(progn
- ,@(loop for model in models
- collect `(perform-define-attributes (quote ,model) (quote ,attribute-definitions)))
- (mapcar #'find-class-attributes (quote ,models ))))
-
-(defun find-presentation-attributes (model)
- (remove nil (mapcar #'(lambda (att)
- (when (keywordp (car att))
- att))
- (cdr (find-class-attributes model)))))
-
-
-;;;; ** Default Attributes
-
-
-;;;; The default mewa class contains the types use as defaults.
-;;;; maps meta-model slot-types to slot-presentation
-
-(defvar *default-attributes-class-name* 'default)
-
-(define-attributes (default)
- (boolean mewa-boolean)
- (string mewa-string)
- (number mewa-currency)
- (integer mewa-integer)
- (currency mewa-currency)
- (clsql:generalized-boolean mewa-boolean)
- (foreign-key foreign-key)
- (:viewer mewa-viewer)
- (:editor mewa-editor)
- (:creator mewa-creator)
- (:one-line mewa-one-line-presentation)
- (:listing mewa-list-presentation :global-properties (:editablep nil) :editablep t)
- (:search-model mewa-object-presentation))
-
-
-(defun find-default-presentation-attributes ()
- (if (eql *default-attributes-class-name* 'default)
- (find-presentation-attributes 'default)
- (remove-duplicates (append
- (find-presentation-attributes 'default)
- (find-presentation-attributes
- *default-attributes-class-name*)))))
-
-
-(defmacro with-default-attributes ((model-name) &body body)
- `(let ((*default-attributes-class-name* ',model-name))
- ,@body))
-
-(defun gen-ptype (type)
- (let ((type (if (consp type) (car type) type)))
- (or (second (find-attribute *default-attributes-class-name* type))
- (second (find-attribute 'default type))
- type)))
-
-(defun gen-presentation-slots (instance)
- (mapcar #'(lambda (x) (gen-pslot (cadr x)
- (string (car x))
- (car x)))
- (meta-model:list-slot-types instance)))
-
-
-(defun gen-pslot (type label slot-name)
- (copy-list `(,(gen-ptype type)
- :label ,label
- :slot-name ,slot-name)))
-
-(defun gen-presentation-args (instance args)
- (declare (ignore instance))
- (if args args nil))
-
-
-(defmethod find-default-attributes ((model t))
- "return the default attributes for a given model using the meta-model's meta-data"
- (append (mapcar #'(lambda (s)
- (cons (car s)
- (gen-pslot
- (if (meta-model:foreign-key-p model (car s))
- 'foreign-key
- (cadr s))
- (string (car s)) (car s))))
- (meta-model:list-slot-types model))
- (mapcar #'(lambda (s)
- (cons s (append (gen-pslot 'has-many (string s) s)
- `(:presentation
- (make-presentation
- ,model
- :type :one-line)))))
- (meta-model:list-has-many model))
- (find-default-presentation-attributes)))
-
-(defmethod set-default-attributes ((model t))
- "Set the default attributes for MODEL"
- (clear-class-attributes model)
- (mapcar #'(lambda (x)
- (setf (find-attribute model (car x)) (cdr x)))
- (find-default-attributes model)))
-
-
-(defgeneric attributes-getter (model))
-
-;;;presentations
-
-(defcomponent mewa ()
- ((instance :accessor instance :initarg :instance)
- (attributes
- :initarg :attributes
- :accessor attributes
- :initform nil)
- (attributes-getter
- :accessor attributes-getter
- :initform #'get-attributes
- :initarg :attributes-getter)
- (attribute-slot-map
- :accessor attribute-slot-map
- :initform nil)
- (global-properties
- :initarg :global-properties
- :accessor global-properties
- :initform nil)
- (classes
- :initarg :classes
- :accessor classes
- :initform nil)
- (use-instance-class-p
- :initarg :use-instance-class-p
- :accessor use-instance-class-p
- :initform t)
- (initializedp :initform nil)
- (modifiedp :accessor modifiedp :initform nil :initarg :modifiedp)
- (modifications :accessor modifications :initform nil)))
-
-
-(defmethod attributes :around ((self mewa))
- (let ((a (call-next-method)))
- (or a (funcall (attributes-getter self) self))))
-
-(defgeneric get-attributes (mewa))
-
-(defmethod get-attributes ((self mewa))
- (if (instance self)
- (append (meta-model:list-slots (instance self))
- (meta-model:list-has-many (instance self)))
- nil))
-
-(defmethod find-instance-classes ((self mewa))
- (mapcar #'class-name
- (it.bese.arnesi.mopp:compute-class-precedence-list (class-of (instance self)))))
-
-(defmethod find-all-attributes ((self mewa))
- (reduce #'append
- (mapcar #'(lambda (x)
- (cdr (find-class-attributes x)))
- (classes self))))
-
-(defun make-attribute (&rest props &key type &allow-other-keys)
- (remf props :type)
- (cons (gensym) (cons type props)))
-
-
-(defmethod find-applicable-attributes ((self mewa))
- (let ((all-attributes (find-all-attributes self)))
- (flet ((gen-att (x) (let ((att (assoc x all-attributes)))
- (when att
- (setf (cddr att) (plist-union (global-properties self) (cddr att)))
- att))))
- (if (attributes self)
- (remove 'nil
- (mapcar #'(lambda (x)
- (cond
- ;;simple casee
- ((symbolp x)
- (gen-att x))
- ;;if the car is a keyword then this is an inline def
- ((and (listp x) (keywordp (car x)))
- (let ((att (apply #'make-attribute x)))
- (setf (cddr att)
- (plist-union (cddr att) (global-properties self)))
- att))
- ;; if the plist has a :type
- ((and (listp x) (getf (cdr x) :type))
- (let ((new (cdr (apply #'make-attribute (cdr x))))
- (def (gen-att (car x))))
- (setf (cdr new) (plist-union (cdr new) (cddr def)))
- (cons (car def) new)))
- ;;finally if we are just overiding the props
- ((and (listp x) (symbolp (car x)))
- (let ((new (cdr (apply #'make-attribute (cdr x))))
- (def (gen-att (car x))))
- (setf (cdr new) (plist-union (cdr new) (cddr def)))
- (cons (car def) (cons (second def) (cdr new)))))
-
- )
- )
-
- (attributes self)))
- all-attributes))))
-
-(defmethod find-slot-presentation-for-attribute ((self mewa) attribute)
- (let ((class-name
- (or (gethash (if (consp (second attribute))
- (car (second attribute))
- (second attribute))
- *presentation-slot-type-mapping*)
- (error "Can't find slot type for ~A in ~A" attribute self ))))
-
- (cons (first attribute) (apply #'make-instance
- class-name
- (append (cddr attribute) (list :parent self :size 30))))))
-
-(defmethod find-slot-presentations ((self mewa))
- (mapcar #'(lambda (a) (find-slot-presentation-for-attribute self a))
- (find-applicable-attributes self)))
-
-(defmethod find-attribute-slot ((self mewa) (attribute symbol))
- (cdr (assoc attribute (attribute-slot-map self))))
-
-(defmethod initialize-slots ((self mewa))
- (when (instance self)
- (when (use-instance-class-p self)
- (setf (classes self)
- (append (find-instance-classes self)
- (classes self))))
- (setf (attribute-slot-map self) (find-slot-presentations self))
- (setf (slots self) (mapcar #'(lambda (x)(cdr x)) (attribute-slot-map self )))))
-
-
-(defmethod make-presentation ((object t) &key (type :viewer) (initargs nil))
- (let* ((p (make-instance 'mewa-object-presentation))
- (a (progn (setf (slot-value p 'instance) object)
- (initialize-slots p)
- (assoc type (find-all-attributes p))))
- (i (apply #'make-instance (or (second a)
- ;; if we didnt find the type,
- ;; use the symbol as a class.
- (if (eql (symbol-package type)
- (find-package 'keyword))
- (symbol-name type)
- type))
- (plist-union initargs (cddr a)))))
- (setf (slot-value i 'instance) object)
- (initialize-slots i)
- (setf (slot-value i 'initializedp) t)
- i))
-
-(defmethod make-presentation ((list list) &key (type :listing) (initargs nil))
-
- (let ((args (append
- `(:type ,type)
- `(:initargs
- (:instances ,list
- ,@initargs)))))
-
- (apply #'make-presentation (car list) args)))
-
-(defmethod initialize-slots-place ((place ucw::place) (mewa mewa))
- (setf (slots mewa) (mapcar #'(lambda (x)
- (prog1 x
- (setf (component.place x) place)))
- (slots mewa))))
-
-(arnesi:defmethod/cc call-component :before ((from standard-component) (to mewa))
- (unless (slot-value to 'initializedp)
- (initialize-slots to))
- (setf (slot-value to 'initializedp) t)
- (initialize-slots-place (component.place from) to)
- to)
-
-
-
-(defmacro call-presentation (object &rest args)
- `(present-object ,object :presentation (make-presentation ,object ,@args)))
-
-
-(defcomponent about-dialog (option-dialog)
- ((body :initarg :body)))
-
-(defmethod render-on ((res response) (self about-dialog))
- (call-next-method)
- (render-on res (slot-value self 'body)))
-
-(defmethod instance-is-stored-p ((instance clsql:standard-db-object))
- (slot-value instance 'clsql-sys::view-database))
-
-(defmethod instance-is-stored-p ((mewa mewa))
- (instance-is-stored-p (instance mewa)))
-
-(defaction cancel-save-instance ((self mewa))
- (cond
- ((instance-is-stored-p (instance self))
- (meta-model::update-instance-from-records (instance self))
- (answer self))
- (t (answer nil))))
-
-(defaction save-instance ((self mewa))
- (meta-model:sync-instance (instance self))
- (setf (modifiedp self) nil)
- (answer self))
-
-(defmethod confirm-sync-instance ((self mewa))
- nil)
-
-(defaction ensure-instance-sync ((self mewa))
- (when (modifiedp self)
- (if nil
- (let ((message (format nil "Record has been modified, Do you wish to save the changes?")))
- (case (call 'about-dialog
- :body (make-presentation (instance self)
- :type :viewer)
- :message message
- :options '((:save . "Save changes to Database")
- (:cancel . "Cancel all changes")))
- (:cancel
- (cancel-save-instance self))
- (:save
- (save-instance self))))
- (save-instance self))))
-
-(defaction sync-and-answer ((self mewa))
- (ensure-instance-sync self)
- (answer (instance self)))
-
-(defaction ok ((self mewa) &optional arg)
- "Returns the component if it has not been modified. if it has been, prompt user to save or cancel"
- ;(declare (ignore arg))
- (sync-and-answer self))
-
-(defmethod (setf presentation-slot-value) :around (value (slot slot-presentation) instance)
- (let* ((old (prog1
- (presentation-slot-value slot instance)
- (call-next-method)))
- (new (presentation-slot-value slot instance)))
-
- (unless (equal new old )
- (let ((self (ucw::parent slot)))
- (setf (modifiedp self) instance
- (modifications self) (append (list new old value slot instance) (modifications self)))))))
-
-
-
-
-
-
-
-;; This software is Copyright (c) Drew Crampsie, 2004-2005.
-;; You are granted the rights to distribute
-;; and use this software as governed by the terms
-;; of the Lisp Lesser GNU Public License
-;; (http://opensource.franz.com/preamble.html),
-;; known as the LLGPL.
+(in-package :lisp-on-lines)
+
+;;;; * Occurences
+;;;; Occurences can be thought of as the class of a description.
+;;;; Most of the occurence stuff is depreciated now.
+
+ "an occurence holds the attributes like a class holds slot-definitions.
+Attributes are the yetadata used to display, validate, and otherwise manipulate actual values stored in lisp objects."
+
+(defun find-or-create-occurence (name)
+ "Returns the occurence associated with this name."
+ (let ((description (find-description name)))
+ (if description
+ (class-of description)
+ (class-of (ensure-description name)))))
+
+(defun clear-occurence (occurence)
+ "removes all attributes from the occurence"
+ (setf (attribute-map occurence) (make-hash-table)))
+
+(defgeneric find-occurence (name)
+ (:method (thing)
+ nil)
+ (:method ((name symbol))
+ (find-or-create-occurence name))
+ (:method ((instance standard-object))
+ (multiple-value-bind (occ new?)
+ (find-or-create-occurence (class-name-of instance))
+ (if new?
+ (initialize-occurence-for-instance occ instance)
+ occ))))
+
+(defun list-attributes (occurence)
+ (let (res)
+ (maphash (lambda (k v)
+ (declare (ignore v))
+ (push k res))
+ (attribute-map occurence))
+ res))
+
+
+(defmethod make-attribute-using-slot-definition (slotd)
+ (make-attribute
+ :name (closer-mop:slot-definition-name slotd)
+ :type-spec (closer-mop:slot-definition-type slotd)
+ :type (first (remove-if (lambda (item)
+ (or
+ (eql item 'or)
+ (eql item 'null)
+ (eql item nil)))
+ (ensure-list (closer-mop:slot-definition-type slotd))))))
+
+(defmethod initialize-occurence-for-instance (occurence instance)
+ (let ((slots (closer-mop:class-slots (class-of instance))))
+ (dolist (s slots)
+ (let ((att (make-attribute-using-slot-definition s)))
+ (setf (find-attribute occurence (attribute-name att)) att)))
+ occurence))
+
+
+
+
+;;;; * Attributes
+
+(define-layered-class
+ attribute (description)
+ ((attribute-name :layered-accessor attribute-name
+ :initarg :name
+ :initform (gensym "ATTRIBUTE-")
+ :special t)
+ (occurence :accessor occurence :initarg :occurence :initform nil)
+ (label :initarg :label :layered-accessor label :initform nil :special t)))
+
+
+(defmethod print-object ((self attribute) stream)
+ (print-unreadable-object (self stream :type t)
+ (with-slots (attribute-name description-type) self
+ (format stream "~A ~A" description-type attribute-name))))
+
+(define-layered-class
+ standard-attribute (attribute)
+ ((setter :accessor setter :initarg :setter :special t :initform nil)
+ (getter :accessor getter :initarg :getter :special t :initform nil)
+ (value :accessor value :initarg :value :special t)
+ (slot-name :accessor slot-name :initarg :slot-name :special t :initform nil)
+ (typespec :accessor type-spec :initarg :type-spec :initform nil))
+ (:documentation "Attributes are used to display a part of a thing, such as a slot of an object, a text label, the car of a list, etc."))
+
+(define-layered-method label :around ((attribute standard-attribute))
+ (or (call-next-method) (attribute-name attribute)))
+
+(defmacro defattribute (name supers slots &rest args)
+ (let* (
+ (type-provided-p (second (assoc :type-name args)))
+ (type (or type-provided-p name))
+ (layer (or (second (assoc :in-layer args)) nil))
+ (properties (cdr (assoc :default-properties args)))
+ (cargs (remove-if #'(lambda (key)
+ (or (eql key :type-name)
+ (eql key :default-properties)
+ (eql key :default-initargs)
+ (eql key :in-layer)))
+ args
+ :key #'car)))
+
+ `(progn
+ (define-layered-class
+ ;;;; TODO: fix the naive way of making sure s-a is a superclass
+ ;;;; Need some MOPey goodness.
+ ,name ,@ (when layer `(:in-layer ,layer)),(or supers '(standard-attribute))
+ ,(append slots (properties-as-slots properties))
+ #+ (or) ,@ (cdr cargs)
+ ,@cargs
+ (:default-initargs :properties (list ,@properties)
+ ,@ (cdr (assoc :default-initargs args))))
+
+ ,(when (or
+ type-provided-p
+ (not (find-attribute-class-for-type name)))
+ `(defmethod find-attribute-class-for-type ((type (eql ',type)))
+ ',name)))))
+
+(defun clear-attributes (name)
+ "removes all attributes from an occurance"
+ (clear-occurence (find-occurence name)))
+
+(defmethod find-attribute-class-for-type (type)
+ nil)
+
+(defun make-attribute (&rest args &key type &allow-other-keys)
+ (apply #'make-instance
+ (or (find-attribute-class-for-type type)
+ 'standard-attribute)
+ :properties args
+ args))
+
+(defmethod ensure-attribute ((occurence description) &rest args &key name &allow-other-keys)
+ "Creates an attribute in the given occurence"
+ (let ((attribute (apply #'make-attribute :occurence occurence args)))
+ (setf (find-attribute occurence name) attribute)))
+
+(defmethod find-attribute ((occurence null) name)
+ nil)
+
+(defmethod find-attribute ((occurence description) name)
+ (or (gethash name (attribute-map occurence))
+ (let* ((class (ignore-errors (find-class (name occurence))))
+ (class-direct-superclasses
+ (when class
+ (closer-mop:class-direct-superclasses
+ class))))
+ (when class-direct-superclasses
+ (let ((attribute
+ (find-attribute
+ (find-occurence (class-name
+ (car
+ class-direct-superclasses)))
+ name)))
+ attribute)))))
+
+(defmethod find-all-attributes ((occurence description))
+ (loop for att being the hash-values of (attribute-map occurence)
+ collect att))
+
+(defmethod ensure-attribute (occurence-name &rest args &key name type &allow-other-keys)
+ (declare (ignore name type))
+ (apply #'ensure-attribute
+ (find-occurence occurence-name)
+ args))
+
+;;;; The following functions make up the public interface to the
+;;;; MEWA Attribute Occurence system.
+
+(defmethod find-all-attributes (occurence-name)
+ (find-all-attributes (find-occurence occurence-name)))
+
+(defmethod find-attribute (occurence-name attribute-name)
+ "Return the ATTRIBUTE named by ATTRIBUTE-NAME in OCCURANCE-name"
+ (find-attribute (find-occurence occurence-name) attribute-name))
+
+(defmethod (setf find-attribute) ((attribute-spec list) occurence-name attribute-name)
+ "Create a new attribute in the occurence.
+ATTRIBUTE-SPEC: a list of (type name &rest initargs)"
+ (apply #'ensure-attribute occurence-name :name attribute-name :type (first attribute-spec) (rest attribute-spec)))
+
+(defmethod (setf find-attribute) ((attribute standard-attribute) occurence attribute-name)
+ "Create a new attribute in the occurence.
+ATTRIBUTE-SPEC: a list of (type name &rest initargs)"
+ (setf (gethash attribute-name (attribute-map occurence))
+ attribute))
+
+(defmethod (setf find-attribute) ((attribute null) occurence attribute-name)
+ "Create a new attribute in the occurence.
+ATTRIBUTE-SPEC: a list of (type name &rest initargs)"
+ (setf (gethash attribute-name (attribute-map occurence))
+ attribute))
+
+(defmethod find-attribute ((attribute-with-occurence attribute) attribute-name)
+ (find-attribute (occurence attribute-with-occurence) attribute-name))
+
+(defmethod set-attribute-properties ((occurence-name t) attribute properties)
+ (setf (description-properties attribute) (plist-nunion
+ properties
+ (description-properties attribute)))
+ (loop for (initarg value) on (description-properties attribute)
+ by #'cddr
+ with map = (initargs.slot-names attribute)
+ do (let ((s-n (assoc-if #'(lambda (x) (member initarg x)) map)))
+
+ (if s-n
+ (progn
+ (setf (slot-value attribute
+ (cdr s-n))
+ value))
+ (warn "Cannot find initarg ~A in attribute ~S" initarg attribute)))
+ finally (return attribute)))
+
+(defmethod set-attribute (occurence-name attribute-name attribute-spec &key (inherit t))
+ "If inherit is T, sets the properties of the attribute only, unless the type has changed.
+otherwise, (setf find-attribute)"
+ (let ((att (find-attribute occurence-name attribute-name)))
+ (if (and att inherit (or (eql (car attribute-spec)
+ (description-type att))
+ (eq (car attribute-spec) t)))
+ (set-attribute-properties occurence-name att (cdr attribute-spec))
+ (setf (find-attribute occurence-name attribute-name)
+ (cons (car attribute-spec)
+ (plist-nunion
+ (cdr attribute-spec)
+ (when att (description-properties att))))))))
+
+(defmethod perform-define-attributes ((occurence-name t) attributes)
+ (loop for attribute in attributes
+ do (destructuring-bind (name type &rest args)
+ attribute
+ (cond ((not (null type))
+ ;;set the type as well
+ (set-attribute occurence-name name (cons type args)))))))
+
+(defmacro define-attributes (occurence-names &body attribute-definitions)
+ `(progn
+ ,@(loop for occurence-name in occurence-names
+ collect `(perform-define-attributes (quote ,occurence-name) (quote ,attribute-definitions)))))
+
+
+
+
+;;"Unused???"
+(defmethod setter (attribute)
+ (warn "Setting ~A in ~A" attribute *context*)
+ (let ((setter (getf (description-properties attribute) :setter))
+ (slot-name (getf (description-properties attribute) :slot-name)))
+ (cond (setter
+ setter)
+ (slot-name
+ #'(lambda (value object)
+ (setf (slot-value object slot-name) value)))
+ (t
+ #'(lambda (value object)
+ (warn "Can't find anywere to set ~A in ~A using ~A" value object attribute))))))
+
+
+(define-layered-function attribute-value (instance attribute)
+ (:documentation " Like SLOT-VALUE for instances, the base method calls GETTER."))
+
+(defmethod attribute-slot-value (instance attribute)
+ "Return (VALUES slot-value-or-nil existsp boundp
+
+If this attribute, in its current context, refers to a slot,
+we return slot-value-or nil either boundp or not."
+ (let (existsp boundp slot-value-or-nil)
+ (cond
+ ((and (slot-boundp attribute 'slot-name) (slot-name attribute))
+ (when (slot-exists-p instance (slot-name attribute))
+ (setf existsp t)
+ (when (slot-boundp instance (slot-name attribute))
+ (setf boundp t
+ slot-value-or-nil (slot-value
+ instance
+ (slot-name attribute))))))
+ ((and (slot-exists-p instance (attribute-name attribute)))
+ (setf existsp t)
+ (when (slot-boundp instance (attribute-name attribute))
+ (setf boundp t
+ slot-value-or-nil (slot-value
+ instance
+ (attribute-name attribute))))))
+ (VALUES slot-value-or-nil existsp boundp)))
+
+(define-layered-method attribute-value (instance (attribute standard-attribute))
+ "return the attribute value or NIL if it cannot be found"
+ (with-slots (getter value) attribute
+ (when (slot-boundp attribute 'value)
+ (setf getter (constantly value)))
+ (if (and (slot-boundp attribute 'getter) getter)
+ ;;;; call the getter
+ (funcall getter instance)
+ ;;;; or default to the attribute-slot-value
+ (attribute-slot-value instance attribute))))
+
+(define-layered-function (setf attribute-value) (value instance attribute))
+
+(define-layered-method
+ (setf attribute-value) (value instance (attribute standard-attribute))
+ (with-slots (setter slot-name) attribute
+ (cond ((and (slot-boundp attribute 'setter) setter)
+ (funcall setter value instance))
+ ((and (slot-boundp attribute 'slot-name) slot-name)
+ (setf (slot-value instance slot-name) value))
+ ((and (slot-exists-p instance (attribute-name attribute)))
+ (setf (slot-value instance (attribute-name attribute)) value))
+ (t
+ (error "Cannot set ~A in ~A" attribute instance)))))
+
+
+
+;;;; ** Default Attributes
+;;;; TODO: This is mosty an ugly hack and should be reworked.
+;;;;
+;;;; The default mewa class contains the types use as defaults.
+;;;; maps meta-model slot-types to slot-presentation
+
+(defvar *default-attributes-class-name* 'default)
+
+(defmacro with-default-attributes ((occurence-name) &body body)
+ `(let ((*default-attributes-class-name* ',occurence-name))
+ ,@body))
+
+(define-attributes (default)
+ (boolean boolean)
+ (string string)
+ (number currency)
+ (integer integer)
+ (currency currency)
+ (clsql:generalized-boolean boolean)
+ (foreign-key has-a))
+
+(defun attribute-to-definition (attribute)
+ (nconc (list (attribute-name attribute)
+ (description-type attribute))
+ (description-properties attribute)))
+
+(defun find-default-presentation-attribute-definitions ()
+ nil)
+
+(defun gen-ptype (type)
+ (let* ((type (if (consp type) (car type) type))
+ (possible-default (find-attribute *default-attributes-class-name* type))
+ (real-default (find-attribute 'default type)))
+ (cond
+ (possible-default
+ (description-type possible-default))
+ (real-default
+ (description-type real-default))
+ (t type))))
+
+(defun gen-presentation-slots (instance)
+ (mapcar #'(lambda (x) (gen-pslot (cadr x)
+ (string (car x))
+ (car x)))
+ (meta-model:list-slot-types instance)))
+
+
+(defun gen-pslot (type label slot-name)
+ (copy-list `(,(gen-ptype type)
+ :label ,label
+ :slot-name ,slot-name)))
+
+;; This software is Copyright (c) Drew Crampsie, 2004-2005.
HCoop / clinton / lisp-on-lines.git / blobdiff