1 /* 2 * Copyright (c) 2019, 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.jpackage.internal; 27 28 import java.io.ByteArrayOutputStream; 29 import java.io.PrintStream; 30 import java.text.MessageFormat; 31 import java.util.ResourceBundle; 32 import java.util.regex.Matcher; 33 import java.util.regex.Pattern; 34 35 public class VersionExtractor extends PrintStream { 36 37 private static final ResourceBundle I18N = ResourceBundle.getBundle( 38 "jdk.jpackage.internal.resources.MainResources"); 39 40 private final String pattern; 41 private String version = null; 42 43 public VersionExtractor(String pattern) { 44 super(new ByteArrayOutputStream()); 45 46 this.pattern = pattern; 47 } 48 49 public String getVersion() { 50 if (version == null) { 51 String content 52 = new String(((ByteArrayOutputStream) out).toByteArray()); 53 Pattern p = Pattern.compile(pattern); 54 Matcher matcher = p.matcher(content); 55 if (matcher.find()) { 56 version = matcher.group(1); 57 } 58 } 59 return version; 60 } 61 62 public static boolean isLessThan(String version, String compareTo) 63 throws RuntimeException { 64 if (version == null || version.isEmpty()) { 65 throw new RuntimeException(MessageFormat.format( 66 I18N.getString("ERR_VersionComparison"), 67 version, compareTo)); 68 } 69 70 if (compareTo == null || compareTo.isEmpty()) { 71 throw new RuntimeException(MessageFormat.format( 72 I18N.getString("ERR_VersionComparison"), 73 version, compareTo)); 74 } 75 76 String [] versionArray = version.trim().split(Pattern.quote(".")); 77 String [] compareToArray = compareTo.trim().split(Pattern.quote(".")); 78 79 for (int i = 0; i < versionArray.length; i++) { 80 int v1 = Integer.parseInt(versionArray[i]); 81 int v2 = Integer.parseInt(compareToArray[i]); 82 if (v1 < v2) { 83 return true; 84 } else if (v1 > v2) { 85 return false; 86 } 87 } 88 89 return false; 90 } 91 }