1 | /* |
---|
2 | * LispClass.java |
---|
3 | * |
---|
4 | * Copyright (C) 2003-2005 Peter Graves |
---|
5 | * $Id: LispClass.java 14796 2015-09-07 12:24:42Z ehuelsmann $ |
---|
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 | |
---|
34 | package org.armedbear.lisp; |
---|
35 | |
---|
36 | import java.util.concurrent.ConcurrentHashMap; |
---|
37 | import static org.armedbear.lisp.Lisp.*; |
---|
38 | |
---|
39 | public abstract class LispClass extends StandardObject |
---|
40 | { |
---|
41 | private static final ConcurrentHashMap<Symbol, LispObject> map |
---|
42 | = new ConcurrentHashMap<Symbol, LispObject>(); |
---|
43 | |
---|
44 | public static <T extends LispClass> T addClass(Symbol symbol, T c) |
---|
45 | { |
---|
46 | map.put(symbol, c); |
---|
47 | return c; |
---|
48 | } |
---|
49 | |
---|
50 | public static LispObject addClass(Symbol symbol, LispObject c) |
---|
51 | { |
---|
52 | map.put(symbol, c); |
---|
53 | return c; |
---|
54 | } |
---|
55 | |
---|
56 | public static void removeClass(Symbol symbol) |
---|
57 | { |
---|
58 | map.remove(symbol); |
---|
59 | } |
---|
60 | |
---|
61 | public static LispClass findClass(Symbol symbol) |
---|
62 | { |
---|
63 | return (LispClass)map.get(symbol); |
---|
64 | } |
---|
65 | |
---|
66 | public static LispObject findClass(LispObject name, boolean errorp) |
---|
67 | |
---|
68 | { |
---|
69 | final Symbol symbol = checkSymbol(name); |
---|
70 | final LispObject c; |
---|
71 | c = map.get(symbol); |
---|
72 | if (c != null) |
---|
73 | return c; |
---|
74 | if (errorp) |
---|
75 | { |
---|
76 | StringBuilder sb = |
---|
77 | new StringBuilder("There is no class named "); |
---|
78 | sb.append(name.princToString()); |
---|
79 | sb.append('.'); |
---|
80 | return error(new LispError(sb.toString())); |
---|
81 | } |
---|
82 | return NIL; |
---|
83 | } |
---|
84 | |
---|
85 | private final int sxhash; |
---|
86 | |
---|
87 | private LispObject name; |
---|
88 | private LispObject propertyList; |
---|
89 | private Layout classLayout; |
---|
90 | private LispObject directSuperclasses = NIL; |
---|
91 | private LispObject directSubclasses = NIL; |
---|
92 | private LispObject classPrecedenceList = NIL; |
---|
93 | private LispObject directMethods = NIL; |
---|
94 | private LispObject documentation = NIL; |
---|
95 | private boolean finalized; |
---|
96 | |
---|
97 | protected LispClass(Layout layout) |
---|
98 | { |
---|
99 | super(layout, layout == null ? 0 : layout.getLength()); |
---|
100 | sxhash = hashCode() & 0x7fffffff; |
---|
101 | } |
---|
102 | |
---|
103 | protected LispClass(Symbol symbol) |
---|
104 | { |
---|
105 | this(null, symbol); |
---|
106 | } |
---|
107 | |
---|
108 | protected LispClass(Layout layout, Symbol symbol) |
---|
109 | { |
---|
110 | super(layout, layout == null ? 0 : layout.getLength()); |
---|
111 | setName(symbol); |
---|
112 | sxhash = hashCode() & 0x7fffffff; |
---|
113 | } |
---|
114 | |
---|
115 | protected LispClass(Layout layout, |
---|
116 | Symbol symbol, LispObject directSuperclasses) |
---|
117 | { |
---|
118 | super(layout, layout == null ? 0 : layout.getLength()); |
---|
119 | sxhash = hashCode() & 0x7fffffff; |
---|
120 | setName(symbol); |
---|
121 | setDirectSuperclasses(directSuperclasses); |
---|
122 | } |
---|
123 | |
---|
124 | @Override |
---|
125 | public LispObject getParts() |
---|
126 | { |
---|
127 | LispObject result = NIL; |
---|
128 | result = result.push(new Cons("NAME", name != null ? name : NIL)); |
---|
129 | result = result.push(new Cons("LAYOUT", |
---|
130 | getClassLayout() != null |
---|
131 | ? getClassLayout() : NIL)); |
---|
132 | result = result.push(new Cons("DIRECT-SUPERCLASSES", |
---|
133 | getDirectSuperclasses())); |
---|
134 | result = result.push(new Cons("DIRECT-SUBCLASSES", getDirectSubclasses())); |
---|
135 | result = result.push(new Cons("CLASS-PRECEDENCE-LIST", getCPL())); |
---|
136 | result = result.push(new Cons("DIRECT-METHODS", getDirectMethods())); |
---|
137 | result = result.push(new Cons("DOCUMENTATION", getDocumentation())); |
---|
138 | return result.nreverse(); |
---|
139 | } |
---|
140 | |
---|
141 | @Override |
---|
142 | public final int sxhash() |
---|
143 | { |
---|
144 | return sxhash; |
---|
145 | } |
---|
146 | |
---|
147 | public LispObject getName() |
---|
148 | { |
---|
149 | return name; |
---|
150 | } |
---|
151 | |
---|
152 | public void setName(LispObject name) |
---|
153 | { |
---|
154 | this.name = name; |
---|
155 | } |
---|
156 | |
---|
157 | @Override |
---|
158 | public final LispObject getPropertyList() |
---|
159 | { |
---|
160 | if (propertyList == null) |
---|
161 | propertyList = NIL; |
---|
162 | return propertyList; |
---|
163 | } |
---|
164 | |
---|
165 | @Override |
---|
166 | public final void setPropertyList(LispObject obj) |
---|
167 | { |
---|
168 | if (obj == null) |
---|
169 | throw new NullPointerException(); |
---|
170 | propertyList = obj; |
---|
171 | } |
---|
172 | |
---|
173 | public Layout getClassLayout() |
---|
174 | { |
---|
175 | return classLayout; |
---|
176 | } |
---|
177 | |
---|
178 | public void setClassLayout(LispObject layout) |
---|
179 | { |
---|
180 | classLayout = layout == NIL ? null : (Layout)layout; |
---|
181 | } |
---|
182 | |
---|
183 | public final int getLayoutLength() |
---|
184 | { |
---|
185 | if (layout == null) |
---|
186 | return 0; |
---|
187 | return layout.getLength(); |
---|
188 | } |
---|
189 | |
---|
190 | public LispObject getDirectSuperclasses() |
---|
191 | { |
---|
192 | return directSuperclasses; |
---|
193 | } |
---|
194 | |
---|
195 | public void setDirectSuperclasses(LispObject directSuperclasses) |
---|
196 | { |
---|
197 | this.directSuperclasses = directSuperclasses; |
---|
198 | } |
---|
199 | |
---|
200 | public boolean isFinalized() |
---|
201 | { |
---|
202 | return finalized; |
---|
203 | } |
---|
204 | |
---|
205 | public void setFinalized(boolean b) |
---|
206 | { |
---|
207 | finalized = b; |
---|
208 | } |
---|
209 | |
---|
210 | // When there's only one direct superclass... |
---|
211 | public final void setDirectSuperclass(LispObject superclass) |
---|
212 | { |
---|
213 | setDirectSuperclasses(new Cons(superclass)); |
---|
214 | } |
---|
215 | |
---|
216 | public LispObject getDirectSubclasses() |
---|
217 | { |
---|
218 | return directSubclasses; |
---|
219 | } |
---|
220 | |
---|
221 | public void setDirectSubclasses(LispObject directSubclasses) |
---|
222 | { |
---|
223 | this.directSubclasses = directSubclasses; |
---|
224 | } |
---|
225 | |
---|
226 | public LispObject getCPL() |
---|
227 | { |
---|
228 | return classPrecedenceList; |
---|
229 | } |
---|
230 | |
---|
231 | public void setCPL(LispObject... cpl) |
---|
232 | { |
---|
233 | LispObject obj1 = cpl[0]; |
---|
234 | if (obj1 instanceof Cons && cpl.length == 1) |
---|
235 | classPrecedenceList = obj1; |
---|
236 | else |
---|
237 | { |
---|
238 | Debug.assertTrue(obj1 == this); |
---|
239 | LispObject l = NIL; |
---|
240 | for (int i = cpl.length; i-- > 0;) |
---|
241 | l = new Cons(cpl[i], l); |
---|
242 | classPrecedenceList = l; |
---|
243 | } |
---|
244 | } |
---|
245 | |
---|
246 | public LispObject getDirectMethods() |
---|
247 | { |
---|
248 | return directMethods; |
---|
249 | } |
---|
250 | |
---|
251 | public void setDirectMethods(LispObject methods) |
---|
252 | { |
---|
253 | directMethods = methods; |
---|
254 | } |
---|
255 | |
---|
256 | public LispObject getDocumentation() |
---|
257 | { |
---|
258 | return documentation; |
---|
259 | } |
---|
260 | |
---|
261 | public void setDocumentation(LispObject doc) |
---|
262 | { |
---|
263 | documentation = doc; |
---|
264 | } |
---|
265 | |
---|
266 | @Override |
---|
267 | public LispObject typeOf() |
---|
268 | { |
---|
269 | return Symbol.CLASS; |
---|
270 | } |
---|
271 | |
---|
272 | @Override |
---|
273 | public LispObject classOf() |
---|
274 | { |
---|
275 | return StandardClass.CLASS; |
---|
276 | } |
---|
277 | |
---|
278 | @Override |
---|
279 | public LispObject typep(LispObject type) |
---|
280 | { |
---|
281 | if (type == Symbol.CLASS) |
---|
282 | return T; |
---|
283 | if (type == StandardClass.CLASS) |
---|
284 | return T; |
---|
285 | return super.typep(type); |
---|
286 | } |
---|
287 | |
---|
288 | public boolean subclassp(LispObject obj) |
---|
289 | { |
---|
290 | return subclassp(this, obj); |
---|
291 | } |
---|
292 | |
---|
293 | public static boolean subclassp(LispObject cls, LispObject obj) |
---|
294 | { |
---|
295 | LispObject cpl; |
---|
296 | |
---|
297 | if (cls instanceof LispClass) |
---|
298 | cpl = ((LispClass)cls).getCPL(); |
---|
299 | else |
---|
300 | cpl = Symbol.CLASS_PRECEDENCE_LIST.execute(cls); |
---|
301 | |
---|
302 | while (cpl != NIL) |
---|
303 | { |
---|
304 | if (cpl.car() == obj) |
---|
305 | return true; |
---|
306 | cpl = ((Cons)cpl).cdr; |
---|
307 | } |
---|
308 | return false; |
---|
309 | } |
---|
310 | |
---|
311 | // ### find-class symbol &optional errorp environment => class |
---|
312 | private static final Primitive FIND_CLASS = |
---|
313 | new Primitive(Symbol.FIND_CLASS, "symbol &optional errorp environment") |
---|
314 | { |
---|
315 | @Override |
---|
316 | public LispObject execute(LispObject arg) |
---|
317 | { |
---|
318 | return findClass(arg, true); |
---|
319 | } |
---|
320 | @Override |
---|
321 | public LispObject execute(LispObject first, LispObject second) |
---|
322 | |
---|
323 | { |
---|
324 | return findClass(first, second != NIL); |
---|
325 | } |
---|
326 | @Override |
---|
327 | public LispObject execute(LispObject className, LispObject errorp, |
---|
328 | LispObject env) |
---|
329 | { |
---|
330 | return (env == NIL) ? findClass(className, errorp != NIL) |
---|
331 | : checkEnvironment(env).findClass(className, errorp != NIL); |
---|
332 | } |
---|
333 | }; |
---|
334 | |
---|
335 | // ### %set-find-class |
---|
336 | private static final Primitive _SET_FIND_CLASS = |
---|
337 | new Primitive("%set-find-class", PACKAGE_SYS, true) |
---|
338 | { |
---|
339 | @Override |
---|
340 | public LispObject execute(LispObject first, LispObject second) |
---|
341 | { |
---|
342 | final Symbol name = checkSymbol(first); |
---|
343 | if (second == NIL) |
---|
344 | { |
---|
345 | removeClass(name); |
---|
346 | return second; |
---|
347 | } |
---|
348 | addClass(name, second); |
---|
349 | return second; |
---|
350 | } |
---|
351 | |
---|
352 | @Override |
---|
353 | public LispObject execute(LispObject className, LispObject clazz, |
---|
354 | LispObject errorp, LispObject env) |
---|
355 | { |
---|
356 | if (clazz == NIL) |
---|
357 | { |
---|
358 | checkEnvironment(env).removeClass(className); |
---|
359 | return clazz; |
---|
360 | } |
---|
361 | |
---|
362 | return checkEnvironment(env).addClass(className, clazz); |
---|
363 | } |
---|
364 | }; |
---|
365 | |
---|
366 | // ### subclassp |
---|
367 | private static final Primitive SUBCLASSP = |
---|
368 | new Primitive(Symbol.SUBCLASSP, "class") |
---|
369 | { |
---|
370 | @Override |
---|
371 | public LispObject execute(LispObject first, LispObject second) |
---|
372 | |
---|
373 | { |
---|
374 | return LispClass.subclassp(first, second) ? T : NIL; |
---|
375 | } |
---|
376 | }; |
---|
377 | } |
---|