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.types.*;
24:
25: /**
26: * base class for database aware collections
27: * @exclude
28: * @persistent
29: * @sharpen.ignore
30: */
31: public abstract class P1Collection extends P1Object implements
32: Db4oCollection {
33:
34: // This is an off-by-one variable.
35: // 0 means default, use standard activation depth
36: // a value greater than 0 means (value - 1)
37: private transient int i_activationDepth;
38:
39: transient boolean i_deleteRemoved;
40:
41: public void activationDepth(int a_depth) {
42: i_activationDepth = a_depth + 1;
43: }
44:
45: public void deleteRemoved(boolean a_flag) {
46: i_deleteRemoved = a_flag;
47: }
48:
49: int elementActivationDepth() {
50: return i_activationDepth - 1;
51: }
52:
53: }
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