1 /***
2 * DiskPropertiesReader.java
3 *
4 * Project: Dependency Tool
5 *
6 * WHEN WHO WHAT
7 * 06.06.2003 pko initial public release
8 * 20.02.2003 pko creation
9 *
10 * Copyright 2003 ELCA Informatique SA
11 * Av. de la Harpe 22-24, 1000 Lausanne 13, Switzerland
12 * www.elca.ch
13 *
14 * This library is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU Lesser General Public License
16 * as published by the Free Software Foundation; either version 2.1 of
17 * the License, or (at your option) any later version.
18 *
19 * This library is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * Lesser General Public License for more details.
23 *
24 * You should have received a copy of the GNU Lesser General Public
25 * License along with this library; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 * USA
28 */
29
30 package ch.elca.dependency.util;
31
32 import java.io.FileInputStream;
33 import java.io.InputStream;
34 import java.util.Properties;
35
36 /***
37 * The class <code>DiskFileReader</code> used to read user properties
38 * stored in plain Files. Usually such properties may and have to be
39 * set by users.
40 *
41 * @author Pawel Kowalski
42 * @version 1.0-beta
43 */
44 public class DiskFileReader implements PropertiesReader {
45
46 //****************************************************************************************/
47 // singleton part
48 //****************************************************************************************/
49
50 /***
51 * The only instance of the DiskFileReader.
52 */
53 private static DiskFileReader m_instance = null;
54
55 /***
56 * Get the one and only instance of this class.
57 *
58 * @return a <code>DiskFileReader</code> value
59 */
60 public static synchronized DiskFileReader singleton() {
61 if (m_instance == null) {
62 m_instance = new DiskFileReader();
63 }
64 return m_instance;
65 }
66
67 //****************************************************************************************/
68 // public methods
69 //****************************************************************************************/
70
71 /***
72 * Get the named properties as a Stream.
73 *
74 * @param propertiesName a <code>String</code> value
75 * @return an <code>InputStream</code> value
76 */
77 public InputStream getPropertiesAsStream(String propertiesName) {
78 try {
79 return new FileInputStream(propertiesName);
80 } catch (Exception e) {
81 return null;
82 }
83 }
84
85 /***
86 * Get the named Properties.
87 *
88 * @param propertiesName a <code>String</code> value
89 * @return a <code>Properties</code> value
90 */
91 public Properties getProperties(String propertiesName) {
92 Properties properties = new Properties();
93 InputStream propertiesStream = getPropertiesAsStream(propertiesName);
94 if (propertiesStream != null) {
95 try {
96 properties.load(getPropertiesAsStream(propertiesName));
97 } catch (Exception e){
98 ;
99 }
100 }
101 return properties;
102 }
103 }
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