source: branches/streams/abcl/src/org/armedbear/lisp/jclass_of.java @ 15795

Last change on this file since 15795 was 12288, checked in by vvoutilainen, 15 years ago

Don't extend Lisp in LispObject, static import Lisp wherever
necessary. Patch by Douglas R. Miles.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 3.1 KB
Line 
1/*
2 * jclass_of.java
3 *
4 * Copyright (C) 2005 Peter Graves
5 * $Id: jclass_of.java 12288 2009-11-29 22:00:12Z vvoutilainen $
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
38// ### jclass-of object &optional name
39public final class jclass_of extends Primitive
40{
41    private jclass_of()
42    {
43        super(Symbol.JCLASS_OF, "object &optional name",
44"Returns the name of the Java class of OBJECT. If the NAME argument is\n" +
45"  supplied, verifies that OBJECT is an instance of the named class. The name\n" +
46"  of the class or nil is always returned as a second value.");
47    }
48
49    @Override
50    public LispObject execute(LispObject arg)
51
52    {
53        final String className;
54        if (arg instanceof AbstractString)
55            className = "java.lang.String";
56        else if (arg instanceof JavaObject)
57            className = ((JavaObject)arg).getObject().getClass().getName();
58        else
59            className = null;
60        final LispObject value =
61            (className != null) ? new SimpleString(className) : NIL;
62        return LispThread.currentThread().setValues(value, value);
63    }
64
65    @Override
66    public LispObject execute(LispObject first, LispObject second)
67
68    {
69        final String className;
70        if (first instanceof AbstractString)
71            className = "java.lang.String";
72        else if (first instanceof JavaObject)
73            className = ((JavaObject)first).getObject().getClass().getName();
74        else
75            className = null;
76        String name = javaString(second);
77        return LispThread.currentThread().setValues(name.equals(className) ? T : NIL,
78                                                    new SimpleString(className));
79    }
80
81    private static final Primitive JCLASS_OF = new jclass_of();
82}
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