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.config;
22:
23: /**
24: * a simple Alias for a single Class or Type, using #equals() on
25: * the names in the resolve method.
26: * <br><br>See {@link Alias} for concrete examples.
27: */
28: public class TypeAlias implements Alias {
29:
30: private final String _storedType;
31:
32: private final String _runtimeType;
33:
34: /**
35: * pass the stored name as the first
36: * parameter and the desired runtime name as the second parameter.
37: */
38: public TypeAlias(String storedType, String runtimeType) {
39: if (null == storedType || null == runtimeType)
40: throw new IllegalArgumentException();
41: _storedType = storedType;
42: _runtimeType = runtimeType;
43: }
44:
45: /**
46: * returns the stored type name if the alias was written for the passed runtime type name
47: */
48: public String resolveRuntimeName(String runtimeTypeName) {
49: return _runtimeType.equals(runtimeTypeName) ? _storedType
50: : null;
51: }
52:
53: /**
54: * returns the runtime type name if the alias was written for the passed stored type name
55: */
56: public String resolveStoredName(String storedTypeName) {
57: return _storedType.equals(storedTypeName) ? _runtimeType : null;
58: }
59:
60: }
|