1 /*
   2  * Copyright (c) 2011, 2016, 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 package com.sun.javafx.tools.ant;
  26 
  27 import java.io.BufferedReader;
  28 import java.io.IOException;
  29 import java.io.InputStream;
  30 import java.io.InputStreamReader;
  31 import java.util.logging.Level;
  32 import java.util.logging.Logger;
  33 
  34 
  35 final class VersionCheck {
  36 
  37     private VersionCheck() {};
  38 
  39     private static final String RESOURCES_VERSION_PROPERTIES = "/resources/version.properties";
  40     private static final String JAVA_VERSION = "java.version";
  41 
  42     private static String getVersion() {
  43         String result = "";
  44         InputStream in = VersionCheck.class.getResourceAsStream(RESOURCES_VERSION_PROPERTIES);
  45         BufferedReader reader = new BufferedReader(new InputStreamReader(in));
  46 
  47         try {
  48             String line = reader.readLine();
  49             if (!line.isEmpty()) {
  50                 String[] parts = line.split("=");
  51                 if (parts.length == 2) {
  52                     result = parts[1];
  53                 }
  54             }
  55         } catch (IOException ex) {
  56         }
  57 
  58         return result;
  59     }
  60 
  61     public static boolean isSameVersion() {
  62         boolean result = false;
  63 
  64         String jarVersion = getVersion();
  65         String runtimeVersion = System.getProperty(JAVA_VERSION);
  66 
  67         if (!jarVersion.isEmpty() && !runtimeVersion.isEmpty() &&
  68             jarVersion.equals(runtimeVersion)) {
  69             result = true;
  70         }
  71 
  72         return result;
  73     }
  74 }