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 
  26 package jdk.nashorn.internal.runtime;
  27 
  28 import java.util.MissingResourceException;
  29 import java.util.ResourceBundle;
  30 
  31 /**
  32  * Class to handle version strings for Nashorn.
  33  */
  34 public 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 }