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Java > Open Source Codes > org > objectweb > modfact > jmi > xmiio > mofobject > NullObject


1 /**
2  * copyright 2002 2004 Laboratoire d'Informatique Paris 6 (LIP6)
3  *
4  * This file is part of ModFact.
5  *
6  * ModFact is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * at your option) any later version.
10  *
11  * ModFact is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with ModFact; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  */
20 package org.objectweb.modfact.jmi.xmiio.mofobject;
21
22 /**
23 * This class represents a null object when no XMI tag is encountered.
24 */
25 public class NullObject implements MOFObject {
26
27     /**
28      * Add a MOFObject to a list of MOFObject.
29      * @param list The list of MOFObject.
30      */
31     public void addMOFObject(MOFObjectList list) {
32         // Nothing to do, a null object is not add to the MOFObject list.
33 }
34
35     /**
36      * Get the encapsulate object (null).
37      * @return The encapsulate object.
38      */
39     public Object JavaDoc get() {
40         return null;
41     }
42
43     /**
44         * Test if the MOFObject represents a real object.
45         * @return TRUE if the MOFObject is a real object.
46         */
47     public boolean isAnObject() {
48         return false;
49     }
50
51     /**
52      * Test if the MOFObject is valid, i.e it represents a real object or a XMI IdRef.
53      * @return TRUE if the MOFObject is valid.
54      */
55     public boolean isValid() {
56         return false;
57     }
58
59 }
60
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