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.util.ArrayList;

    29 import java.util.List;

    30 import java.util.Objects;

    31 

    32 /**

    33  * Dotted numeric version string.

    34  * E.g.: 1.0.37, 10, 0.5

    35  */

    36 class DottedVersion implements Comparable<String> {

    37 

    38     public DottedVersion(String version) {

    39         components = parseVersionString(version);

    40         value = version;

    41     }

    42 

    43     @Override

    44     public int compareTo(String o) {

    45         int result = 0;

    46         int[] otherComponents = parseVersionString(o);

    47         for (int i = 0; i < Math.min(components.length, otherComponents.length)

    48                 && result == 0; ++i) {

    49             result = components[i] - otherComponents[i];

    50         }

    51 

    52         if (result == 0) {

    53             result = components.length - otherComponents.length;

    54         }

    55 

    56         return result;

    57     }

    58 

    59     private static int[] parseVersionString(String version) {

    60         Objects.requireNonNull(version);

    61         if (version.isEmpty()) {

    62             throw new IllegalArgumentException("Version may not be empty string");

    63         }

    64 

    65         int lastNotZeroIdx = -1;

    66         List<Integer> components = new ArrayList<>();

    67         for (var component : version.split("\\.", -1)) {

    68             if (component.isEmpty()) {

    69                 throw new IllegalArgumentException(String.format(

    70                         "Version [%s] contains a zero lenght component", version));

    71             }

    72 

    73             int num = Integer.parseInt(component);

    74             if (num < 0) {

    75                 throw new IllegalArgumentException(String.format(

    76                         "Version [%s] contains invalid component [%s]", version,

    77                         component));

    78             }

    79 

    80             if (num != 0) {

    81                 lastNotZeroIdx = components.size();

    82             }

    83             components.add(num);

    84         }

    85 

    86         if (lastNotZeroIdx + 1 != components.size()) {

    87             // Strip trailing zeros.

    88             components = components.subList(0, lastNotZeroIdx + 1);

    89         }

    90 

    91         return components.stream().mapToInt(Integer::intValue).toArray();

    92     }

    93 

    94     @Override

    95     public String toString() {

    96         return value;

    97     }

    98 

    99     final private int[] components;

   100     final private String value;

   101 }