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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MINIFI-415) Bundle version number should not be compared as a simple String
Date Tue, 16 Jan 2018 18:54:00 GMT

    [ https://issues.apache.org/jira/browse/MINIFI-415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16327580#comment-16327580
] 

ASF GitHub Bot commented on MINIFI-415:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/nifi-minifi/pull/108


> Bundle version number should not be compared as a simple String
> ---------------------------------------------------------------
>
>                 Key: MINIFI-415
>                 URL: https://issues.apache.org/jira/browse/MINIFI-415
>             Project: Apache NiFi MiNiFi
>          Issue Type: Bug
>          Components: Agent Configuration/Installation
>    Affects Versions: 0.3.0
>            Reporter: Koji Kawamura
>            Assignee: Aldrin Piri
>            Priority: Minor
>             Fix For: 0.4.0
>
>
> MINIFI-408 added support for picking the latest bundle version automatically if there
are multiple versions for the same Nar. However, it compares version as simple Strings and
may not be able to pick the latest one semantically.
> https://github.com/apache/nifi-minifi/pull/99/files#diff-c7d8398db8540d6e85f1a9207438ebddR138
> Following code shows the problematic inputs and possible solution. Current implementation
picks "1.0.9", and using Version class, it can pick "1.0.12".
> {code}
> class Test {
>     public static void main(String[] args) throws Exception {
>         Set<String> componentToEnrichBundleVersions = new HashSet<>();
>         componentToEnrichBundleVersions.add("1.0.0");
>         componentToEnrichBundleVersions.add("1.0.5");
>         componentToEnrichBundleVersions.add("1.0.9");
>         componentToEnrichBundleVersions.add("1.0.11-SNAPSHOT");
>         componentToEnrichBundleVersions.add("1.0.12");
>         // Current implementation
>         final String bundleVersion = componentToEnrichBundleVersions.stream().sorted()
>                 .reduce((version, otherVersion) -> otherVersion).orElse(null);
>         // Suggestion
>         final Version latestVersion = componentToEnrichBundleVersions.stream().map(Version::fromString).sorted()
>                 .reduce((version, otherVersion) -> otherVersion).orElse(null);
>         System.out.println(bundleVersion);
>         System.out.println(latestVersion.toVersionString());
>     }
> }
> class Version implements Comparable<Version> {
>     private static Pattern P = Pattern.compile("^([\\d]+)\\.([\\d]+)\\.([\\d]+)([^\\d]*)$");
>     final int major;
>     final int minor;
>     final int patch;
>     final String opt;
>     public static Version fromString(String s) {
>         final Matcher matcher = P.matcher(s);
>         if (matcher.matches()) {
>             return new Version(
>                     Integer.parseInt(matcher.group(1)),
>                     Integer.parseInt(matcher.group(2)),
>                     Integer.parseInt(matcher.group(3)),
>                     matcher.group(4));
>         }
>         throw new IllegalArgumentException("Unknown version pattern " + s);
>     }
>     private Version(int major, int minor, int patch, String opt) {
>         this.major = major;
>         this.minor = minor;
>         this.patch = patch;
>         this.opt = opt;
>     }
>     @Override
>     public int compareTo(@NotNull Version o) {
>         final int ma = new Integer(major).compareTo(o.major);
>         if (ma != 0) {
>             return ma;
>         }
>         final int mi = new Integer(minor).compareTo(o.minor);
>         if (mi != 0) {
>             return mi;
>         }
>         final int pa = new Integer(patch).compareTo(o.patch);
>         if (pa != 0) {
>             return pa;
>         }
>         final String o1 = opt != null ? opt : "";
>         final String o2 = o.opt != null ? o.opt : "";
>         final int op = o1.compareTo(o2);
>         return op;
>     }
>     public String toVersionString() {
>         return String.format("%d.%d.%d%s", major, minor, patch, opt);
>     }
> }
> {code}



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