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Java > Open Source Codes > com > db4o > P1ListElement


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 package com.db4o;
22
23 /**
24  * element of linked lists
25  * @exclude
26  * @persistent
27  */
28 public class P1ListElement extends P1Object{
29     
30     public P1ListElement i_next;
31     public Object JavaDoc i_object;
32     
33     public P1ListElement(){
34     }
35     
36     public P1ListElement(Transaction a_trans, P1ListElement a_next, Object JavaDoc a_object){
37         super(a_trans);
38         i_next = a_next;
39         i_object = a_object;
40     }
41     
42     public int adjustReadDepth(int a_depth) {
43         if(a_depth >= 1){
44             return 1;
45         }
46         return 0;
47     }
48     
49     Object JavaDoc activatedObject(int a_depth){
50         
51         // TODO: It may be possible to optimise away the following call
52 checkActive();
53         
54         
55         activate(i_object, a_depth);
56         return i_object;
57     }
58
59     public Object JavaDoc createDefault(Transaction a_trans) {
60         P1ListElement elem4 = new P1ListElement();
61         elem4.setTrans(a_trans);
62         return elem4;
63     }
64     
65     void delete(boolean a_deleteRemoved){
66         if(a_deleteRemoved){
67             delete(i_object);
68         }
69         delete();
70     }
71     
72     
73 }
74
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