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.WinResources");

    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("error.version-compare"),

    67                     version, compareTo));

    68         }

    69 

    70         if (compareTo == null || compareTo.isEmpty()) {

    71             throw new RuntimeException(MessageFormat.format(

    72                     I18N.getString("error.version-compare"),

    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 }