01: /*
02: * StructureClass.java
03: *
04: * Copyright (C) 2003-2004 Peter Graves
05: * $Id: StructureClass.java,v 1.10 2004/05/23 15:26:51 piso Exp $
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * 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:
22: package org.armedbear.lisp;
23:
24: public class StructureClass extends SlotClass {
25: private StructureClass(Symbol symbol) {
26: super (symbol, new Cons(BuiltInClass.STRUCTURE_OBJECT));
27: }
28:
29: public StructureClass(Symbol symbol, LispObject directSuperclasses) {
30: super (symbol, directSuperclasses);
31: }
32:
33: public LispObject typeOf() {
34: return Symbol.STRUCTURE_CLASS;
35: }
36:
37: public LispClass classOf() {
38: return BuiltInClass.STRUCTURE_CLASS;
39: }
40:
41: public LispObject typep(LispObject type) throws ConditionThrowable {
42: if (type == Symbol.STRUCTURE_CLASS)
43: return T;
44: if (type == BuiltInClass.STRUCTURE_CLASS)
45: return T;
46: return super .typep(type);
47: }
48:
49: public LispObject getDescription() throws ConditionThrowable {
50: return new SimpleString(writeToString());
51: }
52:
53: public String writeToString() throws ConditionThrowable {
54: StringBuffer sb = new StringBuffer("#<STRUCTURE-CLASS ");
55: sb.append(symbol.writeToString());
56: sb.append('>');
57: return sb.toString();
58: }
59:
60: // ### make-structure-class name direct-slots slots include => class
61: private static final Primitive4 MAKE_STRUCTURE_CLASS = new Primitive4(
62: "make-structure-class", PACKAGE_SYS, false) {
63: public LispObject execute(LispObject first, LispObject second,
64: LispObject third, LispObject fourth)
65: throws ConditionThrowable {
66: Symbol symbol = checkSymbol(first);
67: LispObject directSlots = checkList(second);
68: LispObject slots = checkList(third);
69: Symbol include = checkSymbol(fourth);
70: StructureClass c = new StructureClass(symbol);
71: if (include != NIL) {
72: LispClass includedClass = LispClass.findClass(include);
73: if (includedClass == null)
74: return signal(new SimpleError("Class " + include
75: + " is undefined."));
76: c.setCPL(new Cons(c, includedClass.getCPL()));
77: } else
78: c.setCPL(c, BuiltInClass.STRUCTURE_OBJECT,
79: BuiltInClass.CLASS_T);
80: c.setDirectSlots(directSlots);
81: c.setEffectiveSlots(slots);
82: addClass(symbol, c);
83: return c;
84: }
85: };
86: }
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