blob: 1b04bafb98d8ab62c568a9e96ead20fe491c6401 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
package de.lmu.ifi.dbs.elki.datasource;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import de.lmu.ifi.dbs.elki.datasource.bundle.MultipleObjectsBundle;
import de.lmu.ifi.dbs.elki.logging.Logging;
import de.lmu.ifi.dbs.elki.utilities.documentation.Description;
import de.lmu.ifi.dbs.elki.utilities.documentation.Title;
/**
* Pseudo database that is empty.
*
* @author Erich Schubert
*/
@Title("Empty Database")
@Description("Dummy data source that does not provide any objects.")
public class EmptyDatabaseConnection extends AbstractDatabaseConnection {
/**
* Static logger
*/
private static final Logging logger = Logging.getLogger(EmptyDatabaseConnection.class);
/**
* Constructor.
*/
public EmptyDatabaseConnection() {
super(null);
}
@Override
public MultipleObjectsBundle loadData() {
// Return an empty bundle
// TODO: add some dummy column, such as DBIDs?
return new MultipleObjectsBundle();
}
@Override
protected Logging getLogger() {
return logger;
}
}
|
