01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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: import com.db4o.internal.*;
24:
25: /**
26: * element of linked lists
27: * @exclude
28: * @persistent
29: */
30: public class P1ListElement extends P1Object {
31:
32: public P1ListElement i_next;
33: public Object i_object;
34:
35: public P1ListElement() {
36: }
37:
38: public P1ListElement(Transaction a_trans, P1ListElement a_next,
39: Object a_object) {
40: super (a_trans);
41: i_next = a_next;
42: i_object = a_object;
43: }
44:
45: public int adjustReadDepth(int a_depth) {
46: if (a_depth >= 1) {
47: return 1;
48: }
49: return 0;
50: }
51:
52: Object activatedObject(int a_depth) {
53:
54: // TODO: It may be possible to optimise away the following call
55: checkActive();
56:
57: activate(i_object, a_depth);
58: return i_object;
59: }
60:
61: public Object createDefault(Transaction a_trans) {
62: P1ListElement elem4 = new P1ListElement();
63: elem4.setTrans(a_trans);
64: return elem4;
65: }
66:
67: void delete(boolean a_deleteRemoved) {
68: if (a_deleteRemoved) {
69: delete(i_object);
70: }
71: delete();
72: }
73:
74: }
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