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Java > Open Source Codes > com > db4o > inside > convert > ConversionStage


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.inside.convert;
22
23 import com.db4o.*;
24 import com.db4o.inside.*;
25
26 /**
27  * @exclude
28  */
29 public abstract class ConversionStage {
30     
31     public final static class ClassCollectionAvailableStage extends ConversionStage {
32         
33         public ClassCollectionAvailableStage(YapFile file) {
34             super(file);
35         }
36
37         public void accept(Conversion conversion) {
38             conversion.convert(this);
39         }
40     }
41
42     public final static class SystemUpStage extends ConversionStage {
43         public SystemUpStage(YapFile file) {
44             super(file);
45         }
46         public void accept(Conversion conversion) {
47             conversion.convert(this);
48         }
49     }
50
51     private YapFile _file;
52     
53     protected ConversionStage(YapFile file) {
54         _file = file;
55     }
56
57     public YapFile file() {
58         return _file;
59     }
60     
61     public SystemData systemData(){
62         return _file.systemData();
63     }
64     
65     public abstract void accept(Conversion conversion);
66 }
67
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