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
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)
40 (loop for rule in (direct-rules cl)
42 (destructuring-bind (name (&key dependants volatile) &rest source-code)
44 (setf dependants (mklist dependants)
45 volatile (mklist volatile))
46 (make-instance 'rule :name name :dependants dependants
47 :volatile volatile :source-code source-code
48 :access-slots (appendnew dependants volatile)
50 source-code dependants volatile cl))))))
53 (defun fire-class-rules (cl obj slot)
54 "Fire all class rules. Called after a slot is modified."
55 (let ((name (slot-definition-name slot)))
56 (dolist (rule (rules cl))
57 (when (find name (dependants rule))
58 (cmsg-c :debug "firing rule: ~W" (source-code rule))
59 (funcall (func rule) obj)))))
63 (defmethod (setf slot-value-using-class) :around
64 (new-value (cl hyperobject-class) obj (slot hyperobject-esd))
67 (cmsg-c :verbose "Setf slot value: class: ~s, obj: ~s, slot: ~s, value: ~s" cl (class-of obj) slot new-value)
69 (let ((func (esd-value-constraint slot)))
71 ((and func (not (funcall func new-value)))
72 (warn "Rejected change to value of slot ~a of object ~a"
73 (slot-definition-name slot) obj)
74 (slot-value obj (slot-definition-name slot)))
78 (when (direct-rules cl)
79 (fire-class-rules cl obj slot)))))))