1 ;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
6 ;;;; Purpose: Slot and Class rules
7 ;;;; Programmer: Kevin M. Rosenberg
8 ;;;; Date Started: Apr 2000
10 ;;;; $Id: rules.lisp,v 1.47 2003/06/20 08:35:21 kevin Exp $
12 ;;;; This file is Copyright (c) 2000-2003 by Kevin M. Rosenberg
13 ;;;; *************************************************************************
15 (in-package #:hyperobject)
17 ;;; Slot accessor and class rules
20 ((name :initarg :name :initform nil :accessor name)
21 (dependants :initarg :dependants :initform nil :accessor dependants)
22 (volatile :initarg :volatile :initform nil :accessor volatile)
23 (access-slots :initarg :access-slots :initform nil :accessor access-slots)
24 (source-code :initarg :source-code :initform nil :accessor source-code)
25 (func :initform nil :initarg :func :accessor func)))
27 (defun compile-rule (source-code dependants volatile cl)
29 (let ((access (appendnew dependants volatile)))
33 (when (every #'(lambda (x) (slot-boundp obj x))
35 (with-slots ,access obj
38 (defun finalize-rules (cl)
39 (let* ((direct-rules (direct-rules cl))
41 (dolist (rule direct-rules)
42 (destructuring-bind (name (&key dependants volatile) &rest source-code)
44 (setf dependants (mklist dependants)
45 volatile (mklist volatile))
47 (make-instance 'rule :name name :dependants dependants
48 :volatile volatile :source-code source-code
49 :access-slots (appendnew dependants volatile)
51 source-code dependants volatile cl))
53 (setf (rules cl) (nreverse rules))))
56 (defun fire-class-rules (cl obj slot)
57 "Fire all class rules. Called after a slot is modified."
58 (let ((name (slot-definition-name slot)))
59 (dolist (rule (rules cl))
60 (when (find name (dependants rule))
61 (cmsg-c :debug "firing rule: ~W" (source-code rule))
62 (funcall (func rule) obj)))))
67 (defmethod (setf slot-value-using-class) :around
68 (new-value (cl hyperobject-class) obj (slot hyperobject-esd))
71 (cmsg-c :verbose "Setf slot value: class: ~s, obj: ~s, slot: ~s, value: ~s" cl (class-of obj) slot new-value)
73 (let ((func (esd-value-constraint slot)))
75 ((and func (not (funcall func new-value)))
76 (warn "Rejected change to value of slot ~a of object ~a"
77 (slot-definition-name slot) obj)
78 (slot-value obj (slot-definition-name slot)))
82 (when (direct-rules cl)
83 (fire-class-rules cl obj slot)))))))