source: branches/streams/abcl/src/org/armedbear/lisp/SlotDefinitionClass.java

Last change on this file was 14479, checked in by rschlatte, 12 years ago

Rename and slightly refactor sys:make-slot-definition

  • rename to %make-slot-definition, make class argument mandatory
  • adjust call sites
  • also move checkSlotDefinition() method to location of sole caller
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 3.7 KB
Line 
1/*
2 * SlotDefinitionClass.java
3 *
4 * Copyright (C) 2005 Peter Graves
5 * $Id: SlotDefinitionClass.java 14479 2013-04-24 12:51:16Z rschlatte $
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
20 *
21 * As a special exception, the copyright holders of this library give you
22 * permission to link this library with independent modules to produce an
23 * executable, regardless of the license terms of these independent
24 * modules, and to copy and distribute the resulting executable under
25 * terms of your choice, provided that you also meet, for each linked
26 * independent module, the terms and conditions of the license of that
27 * module.  An independent module is a module which is not derived from
28 * or based on this library.  If you modify this library, you may extend
29 * this exception to your version of the library, but you are not
30 * obligated to do so.  If you do not wish to do so, delete this
31 * exception statement from your version.
32 */
33
34package org.armedbear.lisp;
35
36import static org.armedbear.lisp.Lisp.*;
37
38public final class SlotDefinitionClass extends StandardClass
39{
40    public SlotDefinitionClass(Symbol symbol, LispObject cpl) {
41        super(symbol, cpl);
42        LispObject[] instanceSlotNames = {
43            Symbol.NAME,
44            Symbol.INITFUNCTION,
45            Symbol.INITFORM,
46            Symbol.INITARGS,
47            Symbol.READERS,
48            Symbol.WRITERS,
49            Symbol.ALLOCATION,
50            Symbol.ALLOCATION_CLASS,
51            Symbol.LOCATION,
52            Symbol._TYPE,
53            Symbol._DOCUMENTATION
54        };
55        setClassLayout(new Layout(this, instanceSlotNames, NIL));
56        //Set up slot definitions so that this class can be extended by users
57        LispObject slotDefinitions = NIL;
58        for(int i = instanceSlotNames.length - 1; i >= 0; i--) {
59            slotDefinitions = slotDefinitions.push(new SlotDefinition(this, instanceSlotNames[i]));
60        }
61        // The Java class SlotDefinition sets the location slot to NIL
62        // in its constructor; here we make Lisp-side subclasses of
63        // standard-*-slot-definition do the same.
64        StandardObject locationSlot =
65          checkSlotDefinition(slotDefinitions.nthcdr(8).car());
66        locationSlot.setInstanceSlotValue(Symbol.INITFORM, NIL);
67        locationSlot.setInstanceSlotValue(Symbol.INITFUNCTION, StandardClass.constantlyNil);
68        // Fix initargs of TYPE, DOCUMENTATION slots.
69        StandardObject typeSlot =
70          checkSlotDefinition(slotDefinitions.nthcdr(9).car());
71        typeSlot.setInstanceSlotValue(Symbol.INITARGS, list(internKeyword("TYPE")));
72        StandardObject documentationSlot =
73          checkSlotDefinition(slotDefinitions.nthcdr(10).car());
74        documentationSlot.setInstanceSlotValue(Symbol.INITARGS, list(internKeyword("DOCUMENTATION")));
75        setDirectSlotDefinitions(slotDefinitions);
76        setSlotDefinitions(slotDefinitions);
77        setFinalized(true);
78    }
79
80  private static StandardObject checkSlotDefinition(LispObject obj) {
81    if (obj instanceof StandardObject) return (StandardObject)obj;
82    return (StandardObject)type_error(obj, Symbol.SLOT_DEFINITION);
83  }
84}
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