1 /* ============================================================
2 * JRobin : Pure java implementation of RRDTool's functionality
3 * ============================================================
4 *
5 * Project Info: http://www.jrobin.org
6 * Project Lead: Sasa Markovic (saxon@jrobin.org);
7 *
8 * (C) Copyright 2003-2005, by Sasa Markovic.
9 *
10 * Developers: Sasa Markovic (saxon@jrobin.org)
11 *
12 *
13 * This library is free software; you can redistribute it and/or modify it under the terms
14 * of the GNU Lesser General Public License as published by the Free Software Foundation;
15 * either version 2.1 of the License, or (at your option) any later version.
16 *
17 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
18 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
19 * See the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License along with this
22 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
23 * Boston, MA 02111-1307, USA.
24 */
25
26 package org.jrobin.core;
27
28 import java.io.IOException;
29
30 /**
31 * Factory class which creates actual {@link RrdFileBackend} objects. This was the default
32 * backend factory in JRobin before 1.4.0 release.
33 */
34 public class RrdFileBackendFactory extends RrdBackendFactory {
35 /**
36 * factory name, "FILE"
37 */
38 public static final String NAME = "FILE";
39
40 /**
41 * Creates RrdFileBackend object for the given file path.
42 *
43 * @param path File path
44 * @param readOnly True, if the file should be accessed in read/only mode.
45 * False otherwise.
46 * @return RrdFileBackend object which handles all I/O operations for the given file path
47 * @throws IOException Thrown in case of I/O error.
48 */
49 protected RrdBackend open(String path, boolean readOnly) throws IOException {
50 return new RrdFileBackend(path, readOnly);
51 }
52
53 /**
54 * Method to determine if a file with the given path already exists.
55 *
56 * @param path File path
57 * @return True, if such file exists, false otherwise.
58 */
59 protected boolean exists(String path) {
60 return Util.fileExists(path);
61 }
62
63 /**
64 * Returns the name of this factory.
65 *
66 * @return Factory name (equals to string "FILE")
67 */
68 public String getFactoryName() {
69 return NAME;
70 }
71 }
72