-(declaim (optimize (speed 2) (space 3) (safety 0)))
-
-(in-package :lisp-on-lines)
-
-(defparameter *default-type* :ucw)
-
-;;;; I think these are unused now
-(defmethod perform-set-attributes ((occurence-name t) definitions)
- (dolist (def definitions)
- (funcall #'set-attribute occurence-name (first def) (rest def))))
-
-(defmethod perform-set-attribute-properties ((occurence-name t) definitions)
- (dolist (def definitions)
- (funcall #'set-attribute-properties occurence-name (car def) (cdr def))))
-
-;;;; PLIST Utilities.
-
-(defun plist-nunion (new-props plist)
- "Destructive Merge of plists. PLIST is modified and returned.
-NEW-PROPS is merged into PLIST such that any properties
-in both PLIST and NEW-PROPS get the value in NEW-PROPS.
-The other properties in PLIST are left untouched."
- (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)))
-
-
-;;;; * Occurences
-
-(defvar *occurence-map* (make-hash-table)
- "Presentations are created by associating an 'occurence'
-with an instance of a class. This is usually keyed off class-name,
-although an arbitrary occurence can be used with an arbitrary class.")
-
-(define-layered-class
- standard-occurence ()
- ((attribute-map :accessor attribute-map :initform (make-hash-table)))
- (:documentation
- "an occurence holds the attributes like a class holds slot-definitions.
-Attributes are the metadata 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 ((occurence (gethash name *occurence-map*)))
- (if occurence
- occurence
- (let ((new-occurence (make-instance 'standard-occurence)))
- (setf (gethash name *occurence-map*) new-occurence)
- new-occurence))))
-
-(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))
- (find-or-create-occurence (class-name (class-of instance)))))
-
-
-;;;; * Attributes
-
-(define-layered-class
- standard-attribute ()
- ((name :layered-accessor attribute.name :initarg :name :initform "attribute")
- (type :layered-accessor attribute.type :initarg :type :initform t :type symbol)
- (plist :layered-accessor attribute.plist :initarg :plist :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."))
-
-(defmacro defattribute (name supers slots &rest args)
- (let ((type (or (second (assoc :type-name args)) name) ))
- `(progn
-
- (define-layered-class
- ;;;; TODO: naive way of making sure s-a is a superclass
- ,name ,(or supers '(standard-attribute))
- ,slots
- #+ (or) ,@ (cdr args) )
- (defmethod find-attribute-class-for-type ((type (eql ',type)))
- ',name))))
-
-(defmethod print-object ((self standard-attribute) stream)
- (print-unreadable-object (self stream :type t)
- (with-slots (name type) self
- (format stream "~A ~A" name type))))
-
-(define-layered-class
- presentation-attribute (standard-attribute)
- ()
- (:documentation "Presentation Attributes are used to display objects
-using the attributes defined in an occurence. Presentation Attributes are always named using keywords."))
-
-(defun clear-attributes (name)
- "removes all attributes from an occurance"
- (clear-occurence (find-occurence name)))
-
-(defmethod find-attribute-class-for-type (type)
- nil)
-
-(defmethod find-attribute-class-for-name (name)
- "presentation attributes are named using keywords"
- (if (keywordp name)
- 'presentation-attribute
- 'standard-attribute))
-
-(defun make-attribute (&key name type plist)
- (make-instance (or (find-attribute-class-for-type type)
- (find-attribute-class-for-name name))
- :name name :type type :plist plist))
-
-(defmethod ensure-attribute ((occurence standard-occurence) name type plist)
- "Creates an attribute in the given occurence"
- (setf (gethash name (attribute-map occurence))
- (make-attribute :name name :type type :plist plist)))
-
-(defmethod find-attribute ((occurence standard-occurence) name)
- (gethash name (attribute-map occurence)))
-
-(defmethod find-all-attributes ((occurence standard-occurence))
- (loop for att being the hash-values of (attribute-map occurence)
- collect att))
-
-(defmethod ensure-attribute (occurence-name name type plist)
- (ensure-attribute
- (find-occurence occurence-name)
- name
- type
- plist))
-
-;;;; 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)
- "Returns the ATTRIBUTE named by ATTRIBUTE-NAME in OCCURANCE-name"
- (find-attribute (find-occurence occurence-name) attribute-name))
-
-(defmethod (setf find-attribute) ((def list) occurence-name attribute-name)
- (ensure-attribute occurence-name attribute-name (first def) (rest def)))
-
-(defmethod set-attribute (occurence-name attribute-name definition &key (inherit t))
- (let ((att (find-attribute occurence-name attribute-name)))
- (setf (find-attribute occurence-name attribute-name)
- (if (and att inherit)
- (cons (car definition)
- (plist-union (cdr definition)
- (attribute.plist att)))
- definition))))
-
-(defmethod set-attribute-properties ((occurence-name t) attribute properties)
- (let ((a (find-attribute occurence-name attribute)))
- (if a
- (setf (attribute.plist a) (plist-nunion properties (attribute.plist a)))
- (error "Attribute ~A does not exist" attribute))))
-
-(defmethod perform-define-attributes ((occurence-name 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 occurence-name name args))
- ((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)))))
-
-
-(defmethod setter (attribute)
- (warn "Setting ~A in ~A" attribute *context*)
- (let ((setter (getf (attribute.plist attribute) :setter))
- (slot-name (getf (attribute.plist 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))))))
-
-(defmethod getter (attribute)
- (let ((getter (getf (attribute.plist attribute) :getter))
- (slot-name (getf (attribute.plist attribute) :slot-name)))
- (cond (getter
- getter)
- (slot-name
- #'(lambda (object)
- (when (slot-boundp object slot-name)
- (slot-value object slot-name)))))))
-
-
-(define-layered-function attribute-value (instance attribute)
- (:documentation " Like SLOT-VALUE for instances, the base method calls GETTER."))
-
-
-
-(define-layered-method attribute-value (instance (attribute standard-attribute))
- (funcall (getter attribute) instance))
-
-(define-layered-function (setf attribute-value) (value instance attribute))
-
-(define-layered-method (setf attribute-value) (value instance (attribute standard-attribute))
- (funcall (setter attribute) value instance))
-
-
-;;;; ** 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)
-
-(defmacro with-default-attributes ((occurence-name) &body body)
- `(let ((*default-attributes-class-name* ',occurence-name))
- ,@body))
-
-(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)
- (:as-string mewa-one-line-presentation)
- (:one-line mewa-one-line-presentation)
- (:listing mewa-list-presentation :global-properties (:editablep nil) :editablep t)
- (:search-model mewa-object-presentation))
-
-(defun find-presentation-attributes (occurence-name)
- (loop for att in (find-all-attributes occurence-name)
- when (typep att 'presentation-attribute)
- collect att))
-
-(defun attribute-to-definition (attribute)
- (nconc (list (attribute.name attribute)
- (attribute.type attribute))
- (attribute.plist attribute)))
-
-(defun find-default-presentation-attribute-definitions ()
- (if (eql *default-attributes-class-name* 'default)
- (mapcar #'attribute-to-definition (find-presentation-attributes 'default))
- (remove-duplicates (mapcar #'attribute-to-definition
- (append
- (find-presentation-attributes 'default)
- (find-presentation-attributes
- *default-attributes-class-name*))))))
-(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
- (attribute.type possible-default))
- (real-default
- (attribute.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)))
-
-
-
-;;;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)))))
-
-(defun make-presentation-for-attribute-list-item
- (occurence att-name plist parent-presentation &optional type)
- (declare (type list plist) (type symbol att-name))
- "This is a ucw specific function that will eventually be factored elsewhere."
- (let* ((attribute (find-attribute occurence att-name))
- (type (when attribute (or type (attribute.type attribute))))
- (class-name
- (or (gethash (if (consp type)
- (car type)
- type)
- *presentation-slot-type-mapping*)
- (error "Can't find slot type for ~A in ~A from ~A" att-name occurence parent-presentation))))
-
- (cons (attribute.name attribute) (apply #'make-instance
- class-name
- (append (plist-nunion
- plist
- (plist-union
- (global-properties parent-presentation)
- (attribute.plist attribute)))
- (list :size 30 :parent parent-presentation))))))
-
-(defmethod find-applicable-attributes-using-attribute-list (occurence attribute-list)
- "Returns a list of functions that, when called with an object presentation,
-returns the ucw slot presentation that will be used to present this attribute
-in that object presentation."
- (loop for att in attribute-list
- with funs = (list)
- do (let ((att att)) (cond
- ;;simple casee
- ((symbolp att)
- (push #'(lambda (p)
- (make-presentation-for-attribute-list-item occurence att nil p))
- funs))
- ;;if the car is a keyword then this is an inline def
- ;; drewc nov 12 2005:
- ;; i never used this, and never told anybody about it.
- ;; removing it.
- #+ (or) ((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 att) (getf (cdr att) :type))
- (let ((type (getf (cdr att) :type)))
- (push #'(lambda (p)
- (make-presentation-for-attribute-list-item
- occurence (first att)
- (cdr att)
- p
- type))
- funs)))
- ;;finally if we are just overiding the props
- ((and (listp att) (symbolp (car att)))
- (push #'(lambda (p)
- (make-presentation-for-attribute-list-item occurence (first att) (rest att) p))
- funs))))
- finally (return (nreverse funs))))
-
-
-(defun find-attribute-names (mewa)
- (mapcar #'(lambda (x)
- (if (listp x)
- (first x)
- x))
- (attributes mewa)))
-
-(defmethod find-applicable-attributes ((self mewa))
- (if (attributes self)
- (find-applicable-attributes-using-attribute-list (instance self) (attributes self))
- (find-applicable-attributes-using-attribute-list (instance (get-attributes self)))))
-
-
-(defmethod find-slot-presentations ((self mewa))
- (mapcar #'(lambda (a) (funcall a self))
- (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))
- ;(warn "Initargs : ~A" initargs)
- (let* ((a (find-attribute object type))
- (i (apply #'make-instance
- (if a
- (attribute.type a)
- type)
- (plist-union initargs (when a
- (attribute.plist 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)))
-
-
-(defaction cancel-save-instance ((self mewa))
- (cond
- ((meta-model::persistentp (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