Version.java revision 1526:aad920be350a 
1/*
2 * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.runtime;
27
28import java.util.MissingResourceException;
29import java.util.ResourceBundle;
30
31/**
32 * Class to handle version strings for Nashorn.
33 */
34public final class Version {
35    // Don't create me!
36    private Version() {
37    }
38
39    /**
40     * The current version number as a string.
41     * @return version string
42     */
43    public static String version() {
44        return version("version_short");  // E.g. "9-internal" or "9.1.2"
45    }
46
47    /**
48     * The current full version number as a string.
49     * @return full version string
50     */
51    public static String fullVersion() {
52        return version("version_string"); // E.g. "9.1.2.3-ea-4+nashorn-testing"
53    }
54
55    private static final String   VERSION_RB_NAME = "jdk.nashorn.internal.runtime.resources.version";
56    private static ResourceBundle versionRB;
57
58    private static String version(final String key) {
59        if (versionRB == null) {
60            try {
61                versionRB = ResourceBundle.getBundle(VERSION_RB_NAME);
62            } catch (final MissingResourceException e) {
63                return "version not available";
64            }
65        }
66        try {
67            return versionRB.getString(key);
68        }
69        catch (final MissingResourceException e) {
70            return "version not available";
71        }
72    }
73}
74