X-Git-Url: http://git.kpe.io/?p=hyperobject.git;a=blobdiff_plain;f=mop.lisp;h=817c29c159572c366d0f324afaad9895e76d95bb;hp=45e704aee09c17929079473bf4d0d99c7e7e2a62;hb=e52c58412603bcb1517da095cbbc3ac2dd1d270f;hpb=3a961428b36d0ffa96ad06609c8da75ae1c39a2a

diff --git a/mop.lisp b/mop.lisp
index 45e704a..817c29c 100644
--- a/mop.lisp
+++ b/mop.lisp
@@ -1,329 +1,511 @@
-;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
-;;;; *************************************************************************
-;;;; FILE IDENTIFICATION
-;;;;
-;;;; Name:          mop.lisp
-;;;; Purpose:       Metaobject Protocol Interface
-;;;; Programmer:    Kevin M. Rosenberg
-;;;; Date Started:  Apr 2000
-;;;;
-;;;; This metaclass as functions to classes to allow display
-;;;; in Text, HTML, and XML formats. This includes hyperlinking
-;;;; capability and sub-objects.
-;;;;
-;;;; $Id: mop.lisp,v 1.7 2002/12/06 16:18:49 kevin Exp $
-;;;;
-;;;; This file is Copyright (c) 2000-2002 by Kevin M. Rosenberg
-;;;;
-;;;; *************************************************************************
- 
-(in-package :hyperobject)
-
-(eval-when (:compile-toplevel :execute)
-  (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")
-   (description :initarg :description :initform nil
-		:documentation "Class description")
-   (version :initarg :version :initform nil
-		:documentation "Version number for class")
-   (sql-name :initarg :table-name :initform nil :reader sql-name)
-
-   ;;; The remainder of these fields are calculated one time
-   ;;; in finalize-inheritence.
-   
-   (subobjects :initform nil :documentation
-	       "List of fields that contain a list of subobjects objects.")
-   (hyperlinks :type list :initform nil :documentation 
-	       "List of fields that have hyperlinks")
-   (class-id :type integer :initform nil :documentation
-	     "Unique ID for the class")
-   
-   (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)
-
-   (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)
-   )
-  (: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)))
-
-(defmethod print-object ((obj subobject) (s stream))
-  (print-unreadable-object (obj s :type t :identity t)
-    (format s "~S" (name obj))))
-
-(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 hyperlink) (s stream))
-  (print-unreadable-object (obj s :type t :identity t)
-    (format s "~S" (name obj))))
-
-#+(or cmu scl sbcl)
-(defmethod validate-superclass ((class hyperobject-class) (superclass standard-class))
-  t)
-
-(defmethod finalize-inheritance :after ((cl hyperobject-class))
-  (init-hyperobject-class cl))
-
-;; Slot definitions
-(defmethod direct-slot-definition-class ((cl hyperobject-class) 
-					 #+allegro &rest
-						   iargs)
-  (find-class 'hyperobject-dsd))
-
-
-; Slot definitions
-
-(eval-when (:compile-toplevel :load-toplevel :execute)
-  (defmacro process-class-option (slot-name &optional required)
-    #+lispworks
-    `(defmethod clos:process-a-class-option ((class hyperobject-class)
-					     (name (eql ,slot-name))
-					     value)
-    (when (and ,required (null value))
-      (error "hyperobject class slot ~A must have a value" name))
-    (list name `',value))
-    #+(or allegro sbcl cmu scl)
-    (declare (ignore slot-name required))
-    )
-
-  (defmacro process-slot-option (slot-name)
-    #+lispworks
-    `(defmethod clos:process-a-slot-option ((class hyperobject-class)
-					    (option (eql ,slot-name))
-					    value
-					  already-processed-other-options
-					    slot)
-       (list option `',value))
-    #-lispworks
-    (declare (ignore slot-name))
-    )
-  
-  (dolist (option *class-options*)
-    (eval `(process-class-option ,option)))
-  (dolist (option *slot-options*)
-    (eval `(process-slot-option ,option)))
-
-  (eval
-   `(defclass hyperobject-dsd (standard-direct-slot-definition)
-      (,@(mapcar #'(lambda (x)
-		     `(,(intern (symbol-name x))
-			:initform nil))
-		 *slot-options-no-initarg*)
-	 ,@(mapcar #'(lambda (x)
-		       `(,(intern (symbol-name x))
-			  :initarg
-			  ,(intern (symbol-name x) (symbol-name :keyword))
-			  :initform nil))
-		   *slot-options*))))
-  (eval
-   `(defclass hyperobject-esd (standard-effective-slot-definition)
-      (,@(mapcar #'(lambda (x)
-		     `(,(intern (symbol-name x))
-			:initarg
-			,(intern (symbol-name x) (symbol-name :keyword))
-			:initform nil))
-		  (append *slot-options* *slot-options-no-initarg*)))))
-  ) ;; eval-when
-  
-(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))
-	 (sql-type (ho-type-to-sql-type ho-type)))
-    (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
-       :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)
-       ia))))
-
-(defun ho-type-to-lisp-type (ho-type)
-  (check-type ho-type symbol)
-  (case (intern (symbol-name ho-type) (symbol-name :keyword))
-    (:string
-     'string)
-    (:fixnum
-     'fixnum)
-    (:boolean
-     'boolean)
-    (:integer
-     'integer)
-    (:cdata
-     'string)
-    (:float
-     'float)
-    (:nil
-     t)
-    (otherwise
-     ho-type)))
-
-(defun ho-type-to-sql-type (ho-type)
-  (check-type ho-type symbol)
-  (case (intern (symbol-name ho-type) (symbol-name :keyword))
-    (:string
-     'string)
-    (:fixnum
-     'integer)
-    (:boolean
-     'boolean)
-    (:integer
-     'integer)
-    (:cdata
-     'string)
-    (:float
-     'float)
-    (:nil
-     t)
-    (otherwise
-     ho-type)))
-
-
-;;;; Class initialization function
-
-(defun finalize-subobjects (cl)
-  "Process class subobjects slot"
-  (setf (slot-value cl 'subobjects)
-    (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)))
-      subobjects)))
-
-(defun finalize-documentation (cl)
-  "Calculate class documentation slot"
-  (awhen (slot-value cl 'title)
-	 (setf (slot-value cl 'title)
-	       (etypecase (slot-value cl 'title)
-		   (cons (car it))
-		   ((or string symbol) it))))
-  (awhen (slot-value cl 'description)
-	 (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)
-		   (format nil ": ~A" it ""))
-	      (aif (slot-value cl 'description)
-		   (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) "")
-	      ))))
-
-(defun init-hyperobject-class (cl)
-  "Initialize a hyperobject class. Calculates all class slots"
-  (finalize-subobjects cl)
-  (finalize-views cl)
-  (finalize-hyperlinks cl)
-  (finalize-sql cl)
-  (finalize-documentation cl))
-
-
-;;;; *************************************************************************
-;;;;  Metaclass Slot Accessors
-;;;; *************************************************************************
-
-(defun find-slot-by-name (cl name)
-  (find name (class-slots cl) :key #'slot-definition-name))
-
-(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))
-
-(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))
-
-(defun hyperobject-class-xmlvalue-func (obj)
-  (slot-value (class-of obj) 'xmlvalue-func))
-
-(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-subobjects (obj)
-  (slot-value (class-of obj) 'subobjects))
-
-(defun hyperobject-class-hyperlinks (obj)
-  (slot-value (class-of obj) 'hyperlinks))
-
-(defun hyperobject-class-fields (obj)
-  (class-slots (class-of obj)))
-
-(defun hyperobject-class-print-slots (obj)
-  (slot-value (class-of obj) 'print-slots))
-
-(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))
-
+;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:          mop.lisp
+;;;; Purpose:       Metaobject Protocol Interface
+;;;; Programmer:    Kevin M. Rosenberg
+;;;; Date Started:  Apr 2000
+;;;;
+;;;; This metaclass as functions to classes to allow display
+;;;; in Text, HTML, and XML formats. This includes hyperlinking
+;;;; capability and sub-objects.
+;;;;
+;;;; $Id: mop.lisp,v 1.85 2003/07/29 20:49:05 kevin Exp $
+;;;;
+;;;; This file is Copyright (c) 2000-2003 by Kevin M. Rosenberg
+;;;; *************************************************************************
+ 
+(in-package #:hyperobject)
+
+;; Main class
+
+(defclass hyperobject-class (standard-class)
+  ( ;; slots initialized in defclass
+   (user-name :initarg :user-name :type string :initform nil
+	      :accessor user-name
+	      :documentation "User name for class")
+   (user-name-plural :initarg :user-name-plural :type string :initform nil
+		     :accessor user-name-plural
+		     :documentation "Plural 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
+	    :accessor version
+	    :documentation "Version number for class")
+   (closures :initarg :closures :initform nil
+	     :accessor closures
+	     :documentation "Closures to call on slot chnages")
+   (sql-name :initarg :sql-name :accessor sql-name :initform nil
+	     :documentation "SQL Name for this class")
+   (guid :initarg :guid :accessor guid :initform nil
+	 :documentation "ID string for this class")
+
+   ;;; The remainder of these fields are calculated one time
+   ;;; in finalize-inheritence.
+   
+   (subobjects :initform nil :accessor subobjects
+	       :documentation
+	       "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.")
+   (direct-views :type list :initform nil :initarg :direct-views
+		 :accessor direct-views
+		 :documentation "List of views")
+   (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-class :type symbol :initarg :name-class :reader name-class)
+   (name-slot :type symbol :initarg :name-slot :reader name-slot)
+   (subobj-class :type symbol :initarg :subobj-class :reader subobj-class)
+   (lookup :type (or function symbol) :initarg :lookup :reader lookup)
+   (lookup-keys :type list :initarg :lookup-keys :reader lookup-keys))
+  (:documentation "subobject information")
+  (:default-initargs :name-class nil :name-slot nil :subobj-class nil
+		     :lookup nil :lookup-keys nil))
+
+
+(defmethod print-object ((obj subobject) (s stream))
+  (print-unreadable-object (obj s :type t)
+    (format s "~S" (name-slot obj))))
+
+(defclass hyperlink ()
+  ((name :type symbol :initform nil :initarg :name :reader name)
+   (lookup
+    ;; The type specifier seems to break sbcl
+    :type (or function symbol)
+    ;;    :type t
+    :initform nil :initarg :lookup :reader lookup)
+   (link-parameters :type list :initform nil :initarg :link-parameters
+		    :reader link-parameters)))
+
+(defmethod print-object ((obj hyperlink) (s stream))
+  (print-unreadable-object (obj s :type t :identity t)
+    (format s "~S" (name obj))))
+
+(defmethod validate-superclass ((class hyperobject-class) (superclass standard-class))
+  t)
+
+(defmethod finalize-inheritance :after ((cl hyperobject-class))
+  ;; Work-around needed for OpenMCL
+  #+ignore
+  (unless (find-class (class-name cl))
+    (setf (find-class (class-name cl)) cl))
+  
+  (init-hyperobject-class cl)
+  )
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (when (>= (length (generic-function-lambda-list
+		     (ensure-generic-function
+		      'compute-effective-slot-definition)))
+	    3)
+    (pushnew :ho-normal-cesd cl:*features*))
+  
+    (when (>= (length (generic-function-lambda-list
+		       (ensure-generic-function
+			'direct-slot-definition-class)))
+	    3)
+      (pushnew :ho-normal-dsdc cl:*features*))
+    
+    (when (>= (length (generic-function-lambda-list
+		       (ensure-generic-function
+			'effective-slot-definition-class)))
+	      3)
+      (pushnew :ho-normal-esdc cl:*features*)))
+
+;; Slot definitions
+(defmethod direct-slot-definition-class ((cl hyperobject-class)
+					 #+ho-normal-dsdc &rest iargs)
+  (find-class 'hyperobject-dsd))
+
+(defmethod effective-slot-definition-class ((cl hyperobject-class) 
+					    #+ho-normal-esdc &rest iargs)
+  (find-class 'hyperobject-esd))
+
+
+;;; Slot definitions
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (defmacro process-class-option (slot-name &optional required)
+    #+lispworks
+    `(defmethod clos:process-a-class-option ((class hyperobject-class)
+					     (name (eql ,slot-name))
+					     value)
+      (when (and ,required (null value))
+	(error "hyperobject class slot ~A must have a value" name))
+      (list name `',value))
+    #+(or allegro sbcl cmu scl openmcl)
+    (declare (ignore slot-name required))
+    )
+
+  (defmacro process-slot-option (slot-name)
+    #+lispworks
+    `(defmethod clos:process-a-slot-option ((class hyperobject-class)
+					    (option (eql ,slot-name))
+					    value
+					    already-processed-options
+					    slot)
+      (list* option `',value already-processed-options))
+    #-lispworks
+    (declare (ignore slot-name))
+    )
+  
+  (dolist (option *class-options*)
+    (eval `(process-class-option ,option)))
+  (dolist (option *slot-options*)
+    (eval `(process-slot-option ,option)))
+
+  (eval
+   `(defclass hyperobject-dsd (standard-direct-slot-definition)
+     (,@(mapcar #'(lambda (x)
+		    `(,(intern (symbol-name x))
+		      :initform nil))
+		*slot-options-no-initarg*)
+      ,@(mapcar #'(lambda (x)
+		    `(,(intern (symbol-name x))
+		      :initarg
+		      ,(intern (symbol-name x) (symbol-name :keyword))
+		      :initform nil
+		      :accessor
+		      ,(intern (concatenate 'string
+					    (symbol-name :dsd-)
+					    (symbol-name x)))))
+		*slot-options*))))
+  (eval
+   `(defclass hyperobject-esd (standard-effective-slot-definition)
+     (,@(mapcar #'(lambda (x)
+		    `(,(intern (symbol-name x))
+		      :initarg
+		      ,(intern (symbol-name x) (symbol-name :keyword))
+		      :initform nil
+		      :accessor
+		      ,(intern (concatenate 'string
+					    (symbol-name :esd-)
+					    (symbol-name x)))))
+		(append *slot-options* *slot-options-no-initarg*)))))
+  ) ;; eval-when
+
+(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
+     (list (ensure-keyword (car vt)) (cadr vt)))
+    (t
+     t)))
+
+(defmethod compute-effective-slot-definition :around ((cl hyperobject-class)
+						      #+ho-normal-cesd name
+						      dsds)
+  (declare (ignore #+ho-normal-cesd name))
+  (let ((esd (call-next-method)))
+    (if (typep esd 'hyperobject-esd)
+	(compute-hyperobject-esd esd dsds)
+	esd)))
+
+(defun compute-hyperobject-esd (esd dsds)
+  (let* ((dsd (car dsds))
+	 (value-type (canonicalize-value-type (slot-value dsd 'value-type))))
+    (multiple-value-bind (sql-type sql-length) 
+	(value-type-to-sql-type value-type)
+      (setf (esd-sql-type esd) sql-type)
+      (setf (esd-sql-length esd) sql-length))
+    (setf (slot-value esd 'type) (value-type-to-lisp-type value-type))
+    (setf (esd-value-type esd) value-type)
+    (setf (esd-user-name esd)
+	  (aif (dsd-user-name dsd)
+	       it
+	       (string-downcase (symbol-name (slot-definition-name dsd)))))
+    (setf (esd-sql-name esd)
+	  (aif (dsd-sql-name dsd)
+	       it
+	       (lisp-name-to-sql-name (slot-definition-name dsd))))
+    (setf (esd-sql-name esd)
+	  (aif (dsd-sql-name dsd)
+	       it
+	       (lisp-name-to-sql-name (slot-definition-name dsd))))
+    (dolist (name '(print-formatter subobject hyperlink hyperlink-parameters
+		    description value-constraint indexed null-allowed
+		    unique short-description void-text read-only-groups
+		    hidden-groups unit disable-predicate view-type
+		    list-of-values stored))
+      (setf (slot-value esd name) (slot-value dsd name)))
+    esd))
+
+(defun lisp-name-to-sql-name (lisp)
+  "Convert a lisp name (atom or list, string or symbol) into a canonical
+SQL name"
+  (unless (stringp lisp)
+    (setq lisp
+	  (typecase lisp
+	    (symbol (symbol-name lisp))
+	    (t (write-to-string lisp)))))
+  (do* ((len (length lisp))
+	(sql (make-string len))
+	(i 0 (1+ i)))
+      ((= i len) (string-upcase sql))
+    (declare (fixnum i)
+	     (simple-string sql))
+    (setf (schar sql i)
+	  (let ((c (char lisp i)))
+	    (case c
+	      ((#\- #\$ #\+ #\#) #\_)
+	      (otherwise c))))))
+
+#+ho-normal-cesd
+(setq cl:*features* (delete :ho-normal-cesd cl:*features*))
+#+ho-normal-dsdc
+(setq cl:*features* (delete :ho-normal-dsdc cl:*features*))
+#+ho-normal-esdc
+(setq cl:*features* (delete :ho-normal-esdc cl:*features*))
+
+(defun lisp-type-is-a-string (type)
+  (or (eq type 'string)
+      (and (listp type) (some #'(lambda (x) (eq x 'string)) type))))
+
+(defun base-value-type (value-type)
+  (if (atom value-type)
+      value-type
+    (car value-type)))
+
+(defun value-type-to-lisp-type (value-type)
+  (case (base-value-type value-type)
+    ((:string :cdata :varchar :char)
+     '(or null string))
+    (:character
+     '(or null character))
+    (:fixnum
+     '(or null fixnum))
+    (:boolean
+     '(or null boolean))
+    ((:integer :long-integer)
+     '(or null integer))
+    ((:float :single-float)
+     '(or null single-float))
+    (:double-float
+     '(or null double-float))
+    (otherwise
+     t)))
+
+(defun value-type-to-sql-type (value-type)
+  "Return two values, the sql type and field length."
+  (let ((type (base-value-type value-type))
+	(length (when (consp value-type)
+		  (cadr value-type))))
+    (values
+     (case type
+       ((:char :character)
+	:char)
+       (:varchar
+	:varchar)
+       ((:fixnum :integer)
+	:integer)
+       (:long-integer
+	:long-integer)
+       (:boolean
+	:boolean)
+       ((:float :single-float)
+	:single-float)
+       (:double-float
+	:double-float)
+       (otherwise
+	:text))
+     length)))
+
+;;;; Class initialization function
+
+;; One entry for each class with lazy readers defined.  The value is a plist mapping
+;; slot-name to a lazy reader, each of which is a list of a function and slot-names.
+(defvar *lazy-readers* (make-hash-table))
+
+(defmethod slot-unbound :around ((class hyperobject-class) instance slot-name)
+  (let ((lazy-reader (loop for super in (class-precedence-list class)
+			 as lazy-reader = (getf (gethash super *lazy-readers*) slot-name)
+			 when lazy-reader return it)))
+    (if lazy-reader
+	(setf (slot-value instance slot-name)
+	      (if (atom lazy-reader)
+		  (make-instance lazy-reader)
+		  (apply (car lazy-reader)
+			 (loop for arg-slot-name in (cdr lazy-reader)
+			       collect (slot-value instance arg-slot-name)))))
+	;; No lazy reader -- defer to regular slot-unbound handling.
+	(call-next-method))))
+
+;; The reader is a function and the reader-keys are slot names.  The slot is lazily set to
+;; the result of applying the function to the slot-values of those slots, and that value
+;; is also returned.
+(defun ensure-lazy-reader (cl class-name slot-name subobj-class reader 
+			   &rest reader-keys)
+  (setf (getf (gethash cl *lazy-readers*) slot-name)
+    (aif subobj-class
+	 it
+	 (list* reader (copy-list reader-keys)))))
+
+(defun remove-lazy-reader (class-name slot-name)
+  (setf (getf (gethash (find-class class-name) *lazy-readers*) slot-name)
+    nil))
+
+
+(defun finalize-subobjects (cl)
+  "Process class subobjects slot"
+  (setf (subobjects cl)
+	(let ((subobjects '()))
+	  (dolist (slot (class-slots cl))
+	    (let-when
+	     (subobj-def (esd-subobject slot))
+	     (let ((subobject
+		    (make-instance 'subobject
+				   :name-class (class-name cl)
+				   :name-slot (slot-definition-name slot)
+				   :subobj-class (when (atom subobj-def)
+						   subobj-def)
+				   :lookup (when (listp subobj-def)
+					     (car subobj-def))
+				   :lookup-keys (when (listp subobj-def)
+						  (cdr subobj-def)))))
+	       (unless (eq (lookup subobject) t)
+		 (apply #'ensure-lazy-reader
+			cl
+			(name-class subobject) (name-slot subobject)
+			(subobj-class subobject)
+			(lookup subobject) (lookup-keys subobject))
+		 (push subobject subobjects)))))
+	  ;; sbcl/cmu reverse class-slots compared to the defclass form
+	  ;; so re-reverse on cmu/sbcl
+	  #+(or cmu sbcl) subobjects
+	  #-(or cmu sbcl) (nreverse subobjects)
+	  )))
+
+(defun finalize-class-slots (cl)
+  "Make sure all class slots have an expected value"
+  (unless (user-name cl)
+    (setf (user-name cl) (format nil "~:(~A~)" (class-name cl))))
+  
+  (setf (user-name-plural cl)
+	(if (and (consp (user-name cl)) (cadr (user-name cl)))
+	    (cadr (user-name cl))
+	    (format nil "~A~P" (if (consp (user-name cl))
+				   (car (user-name cl))
+				   (user-name cl))
+		    2)))
+
+  (dolist (name '(user-name description version guid sql-name))
+    (awhen (slot-value cl name)
+	   (setf (slot-value cl name)
+	     (if (listp it)
+		 (car it)
+	       it))))
+  
+  (unless (sql-name cl)
+    (setf (sql-name cl) (lisp-name-to-sql-name (class-name cl))))
+  )
+
+(defun finalize-documentation (cl)
+  "Calculate class documentation slot"
+  (let ((*print-circle* nil))
+    (setf (documentation (class-name cl) 'class)
+	  (format nil "Hyperobject~A~A~A~A"
+		  (aif (user-name cl)
+		       (format nil ": ~A" it ""))
+		  (aif (description cl)
+		       (format nil "~%Class description: ~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 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)))
+    ;; cmu/sbcl reverse class-slots compared to the defclass form
+    ;; hyperlinks is already reversed from the dolist/push loop, so re-reverse on sbcl/cmu
+    #-(or cmu sbcl) (setq hyperlinks (nreverse hyperlinks))
+    (setf (slot-value cl 'hyperlinks) hyperlinks)))
+
+(defun init-hyperobject-class (cl)
+  "Initialize a hyperobject class. Calculates all class slots"
+  (finalize-subobjects cl)
+  (finalize-views cl)
+  (finalize-hyperlinks cl)
+  (finalize-sql cl)
+  (finalize-rules cl)
+  (finalize-class-slots cl)
+  (finalize-documentation cl))
+
+
+;;;; *************************************************************************
+;;;;  Metaclass Slot Accessors
+;;;; *************************************************************************
+
+(defun find-slot-by-name (cl name)
+  (find name (class-slots cl) :key #'slot-definition-name))
+
+(defun hyperobject-class-user-name (obj)
+  (user-name (class-of obj)))
+
+(defun hyperobject-class-user-name-plural (obj)
+  (user-name-plural (class-of obj)))
+
+(defun hyperobject-class-subobjects (obj)
+  (subobjects (class-of obj)))
+
+(defun hyperobject-class-hyperlinks (obj)
+  (hyperlinks (class-of obj)))
+
+(defun hyperobject-class-slots (obj)
+  ;; cmucl/sbcl reverse class-slots
+  #+(or cmu sbcl) (reverse (class-slots (class-of obj)))
+  #-(or cmu sbcl) (class-slots (class-of obj)))
+
+(defun all-subobjects (obj)
+  "Returns a list of all subobjects in an object"
+  (let ((so-list '()))
+    (dolist (subobj-obj (subobjects (class-of obj)) (nreverse so-list))
+      (dolist (so (funcall (name-slot subobj-obj) obj))
+        (push so so-list)))))