1 /*
2 * This file is part of AceLogger.
3 *
4 * AceLogger is free software: you can redistribute it and/or modify it under the terms of the GNU
5 * Lesser General Public License as published by the Free Software Foundation, either version 3 of
6 * the License, or (at your option) any later version.
7 *
8 * AceLogger is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
9 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 * Lesser General Public License for more details.
11 *
12 * You should have received a copy of the GNU Lesser General Public License along with AceLogger.
13 * If not, see <http://www.gnu.org/licenses/lgpl-3.0.html>.
14 */
15 package net.sourceforge.acelogger.interpolator;
16
17 import java.text.MessageFormat;
18
19 import net.sourceforge.acelogger.execution.LogController;
20
21 /**
22 * An implementation of TextInterpolator for the {@link MessageFormat} class.
23 *
24 * @author Zardi (https://sourceforge.net/users/daniel_zardi)
25 * @version 1.0.0
26 * @since 1.0.0
27 */
28 public final class JavaTextFormatInterpolator implements TextInterpolator {
29
30 /**
31 * An instance of this class (the only one).
32 */
33 private static final JavaTextFormatInterpolator INSTANCE = new JavaTextFormatInterpolator();
34
35 /**
36 * Creates a new JavaTextFormatInterpolator (This class is a singleton).
37 *
38 * @since 1.0.0
39 */
40 private JavaTextFormatInterpolator() {}
41
42 /**
43 * Gets a instance of this class. The returned instance is always the same, synchronization
44 * issues are dealt by the methods of this class.
45 *
46 * @return A instance of this class.
47 * @since 1.0.0
48 */
49 public static TextInterpolator getInstance() {
50 return INSTANCE;
51 }
52
53 /** {@inheritDoc} */
54 public String interpolate(String pattern, Object... params) {
55 String formatted = "";
56 if (pattern == null) {
57 LogController.getInternalLogger().warn("Received a null pattern");
58 throw new IllegalArgumentException("The pattern should not be null");
59 } else {
60 try {
61 formatted = new MessageFormat(pattern).format(params);
62 } catch (Exception e) {
63 LogController.getInternalLogger().error(
64 "It was not possible to format \"{0}\" with \"{1}\"", e, pattern, params);
65 throw new IllegalArgumentException("The pattern is invalid", e);
66 }
67 }
68 return formatted;
69 }
70
71 }