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Java > Open Source Codes > com > db4o > ext > ExtDb4o


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.ext;
22
23 import com.db4o.*;
24 import com.db4o.config.*;
25
26 /**
27  * extended factory class with static methods to open special db4o sessions.
28  *
29  * @sharpen.rename ExtDb4oFactory
30  */
31 public class ExtDb4o extends Db4o {
32    /**
33      * Operates just like {@link ExtDb4o#openMemoryFile(Configuration, MemoryFile)}, but uses
34      * the global db4o {@link Configuration Configuration} context.
35      *
36      * opens an {@link ObjectContainer} for in-memory use .
37      * <br><br>In-memory ObjectContainers are useful for maximum performance
38      * on small databases, for swapping objects or for storing db4o format data
39      * to other media or other databases.<br><br>Be aware of the danger of running
40      * into OutOfMemory problems or complete loss of all data, in case of hardware
41      * or JVM failures.<br><br>
42      * @param memoryFile a {@link MemoryFile MemoryFile}
43      * to store the raw byte data.
44      * @return an open {@link com.db4o.ObjectContainer ObjectContainer}
45      * @see MemoryFile
46      */
47     public static final ObjectContainer openMemoryFile(MemoryFile memoryFile) {
48         return openMemoryFile1(Db4o.newConfiguration(),memoryFile);
49     }
50
51     /**
52      * opens an {@link ObjectContainer} for in-memory use .
53      * <br><br>In-memory ObjectContainers are useful for maximum performance
54      * on small databases, for swapping objects or for storing db4o format data
55      * to other media or other databases.<br><br>Be aware of the danger of running
56      * into OutOfMemory problems or complete loss of all data, in case of hardware
57      * or JVM failures.<br><br>
58      * @param config a custom {@link Configuration Configuration} instance to be obtained via {@link Db4o#newConfiguration()}
59      * @param memoryFile a {@link MemoryFile MemoryFile}
60      * to store the raw byte data.
61      * @return an open {@link com.db4o.ObjectContainer ObjectContainer}
62      * @see MemoryFile
63      */
64     public static final ObjectContainer openMemoryFile(Configuration config,MemoryFile memoryFile) {
65         return openMemoryFile1(config,memoryFile);
66     }
67 }
68
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