1 /* |
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2 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package jdk.jpackage.internal; |
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27 |
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28 import java.io.ByteArrayOutputStream; |
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29 import java.io.PrintStream; |
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30 import java.text.MessageFormat; |
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31 import java.util.ResourceBundle; |
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32 import java.util.regex.Matcher; |
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33 import java.util.regex.Pattern; |
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34 |
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35 public class VersionExtractor extends PrintStream { |
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36 |
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37 private static final ResourceBundle I18N = ResourceBundle.getBundle( |
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38 "jdk.jpackage.internal.resources.MainResources"); |
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39 |
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40 private final String pattern; |
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41 private String version = null; |
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42 |
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43 public VersionExtractor(String pattern) { |
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44 super(new ByteArrayOutputStream()); |
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45 |
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46 this.pattern = pattern; |
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47 } |
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48 |
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49 public String getVersion() { |
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50 if (version == null) { |
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51 String content |
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52 = new String(((ByteArrayOutputStream) out).toByteArray()); |
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53 Pattern p = Pattern.compile(pattern); |
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54 Matcher matcher = p.matcher(content); |
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55 if (matcher.find()) { |
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56 version = matcher.group(1); |
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57 } |
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58 } |
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59 return version; |
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60 } |
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61 |
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62 public static boolean isLessThan(String version, String compareTo) |
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63 throws RuntimeException { |
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64 if (version == null || version.isEmpty()) { |
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65 throw new RuntimeException(MessageFormat.format( |
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66 I18N.getString("ERR_VersionComparison"), |
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67 version, compareTo)); |
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68 } |
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69 |
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70 if (compareTo == null || compareTo.isEmpty()) { |
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71 throw new RuntimeException(MessageFormat.format( |
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72 I18N.getString("ERR_VersionComparison"), |
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73 version, compareTo)); |
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74 } |
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75 |
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76 String [] versionArray = version.trim().split(Pattern.quote(".")); |
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77 String [] compareToArray = compareTo.trim().split(Pattern.quote(".")); |
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78 |
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79 for (int i = 0; i < versionArray.length; i++) { |
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80 int v1 = Integer.parseInt(versionArray[i]); |
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81 int v2 = Integer.parseInt(compareToArray[i]); |
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82 if (v1 < v2) { |
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83 return true; |
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84 } else if (v1 > v2) { |
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85 return false; |
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86 } |
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87 } |
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88 |
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89 return false; |
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90 } |
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91 } |
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