How to use

VersionStringComparator

in

com.atlassian.plugin.util

  private static Comparator<String> newVersionComparator() {
    return new VersionStringComparator();
  }
}

if (!VersionStringComparator.isValidVersionString(thisVersion)) {
  if (!VersionStringComparator.isValidVersionString(otherVersion)) {
if (!VersionStringComparator.isValidVersionString(otherVersion)) {
  return 1;
if (VersionStringComparator.isSnapshotVersion(thisVersion) && VersionStringComparator.isSnapshotVersion(otherVersion)) {
  final int comparison = new VersionStringComparator().compare(thisVersion, otherVersion);
  if (comparison == 0) {
    return this.getDateInstalled().compareTo(otherPlugin.getDateInstalled());
return new VersionStringComparator().compare(thisVersion, otherVersion);

private boolean pluginVersionIsAcceptable(final Plugin plugin, final Map<String, String> minimumPluginVersions) {
  final String pluginKey = plugin.getKey();
  final String rawMinimumVersion = minimumPluginVersions.get(pluginKey);
  if (null == rawMinimumVersion) {
    // fine, no minimum given
    return true;
  }
  final String cleanMinimumVersion = cleanVersionString(rawMinimumVersion);
  // Rather than replicate some of the validation login in VersionStringComparator, let it validate and handle errors
  try {
    // Actually compare versions
    final PluginInformation pluginInformation = plugin.getPluginInformation();
    final String pluginVersion = cleanVersionString((pluginInformation != null) ? pluginInformation.getVersion() : null);
    final VersionStringComparator versionStringComparator = new VersionStringComparator();
    return versionStringComparator.compare(pluginVersion, cleanMinimumVersion) >= 0;
  } catch (IllegalArgumentException e_ia) {
    log.warn("Cannot compare minimum version '{}' for plugin {}: {}",
        rawMinimumVersion, plugin, e_ia.getMessage());
    // accept the plugin if something goes wrong
    return true;
  }
}

TreeSet<String> keys = new TreeSet<>(new VersionStringComparator());

TreeMap<String, String> data = new TreeMap<>(new VersionStringComparator());