[[3]] in a "groupId/artifactId/version" snapshot artifact directory: metadata describes <<<groupId>>>, <<<artifactId>>>, <<<version>>> (base version, i.e. ending in <<<-SNAPSHOT>>>) and
       <<<versioning>>> element that gives data about snapshot (<<<snapshot>>>, <<<lastUpdated>>> and <<<snapshotVersions>>> list). Notice that a

  <artifactId>artifact</artifactId>
  <versioning>
    <latest>1.0</latest>
    <release>1.0</release>
    <versions>
      <version>1.0</version>
    </versions>
    <lastUpdated>20111123122038</lastUpdated>
  </versioning>

            if (versioning != null && versioningRef != null) {
                String lastUpdated = versioning.getLastUpdated();
                String now = versioningRef.getLastUpdated();
                if (lastUpdated != null && now != null && now.compareTo(lastUpdated) < 0) {
                    getLogger()

            "type" : "long"
          },
          "jobName" : {
            "type" : "keyword"
          },
          "jobStatus" : {
            "type" : "keyword"
          },
          "lastUpdated" : {
            "type" : "long"
          },
          "scriptData" : {
            "type" : "keyword"
          },
          "scriptResult" : {
            "type" : "keyword"
          },

  <versioning>
    <snapshot>
      <timestamp>20120809.112920</timestamp>
      <buildNumber>97</buildNumber>
    </snapshot>
    <lastUpdated>20120809112920</lastUpdated>
    <snapshotVersions>
      <snapshotVersion>
        <classifier>classifierA</classifier>
        <extension>jar</extension>
        <value>07.20.3-20120809.112124-88</value>

      },
      "scriptType": {
        "type": "keyword"
      },
      "scriptData": {
        "type": "keyword"
      },
      "scriptResult": {
        "type": "keyword"
      },
      "lastUpdated": {
        "type": "long"
      },
      "startTime": {
        "type": "long"
      },
      "endTime": {
        "type": "long"
      }
    }

    }

    @Override
    protected void merge(Metadata recessive) {
        metadata.getVersioning().setLastUpdatedTimestamp(timestamp);

        String lastUpdated = metadata.getVersioning().getLastUpdated();

        Map<String, SnapshotVersion> versions = new LinkedHashMap<>();

        for (Artifact artifact : artifacts) {
            SnapshotVersion sv = new SnapshotVersion();

        File file = new File(localRepository.getBasedir(), localRepository.pathOf(a));
        a.setFile(file);

        assertEquals(
                "a-0.0.1-SNAPSHOT.jar.lastUpdated",
                updateCheckManager.getTouchfile(a).getName());

        a = artifactFactory.createArtifactWithClassifier("groupId", "a", "0.0.1-SNAPSHOT", "jar", "classifier");

        enableLogging(logger);
        this.trackingFileManager = trackingFileManager;
    }

    public static final String LAST_UPDATE_TAG = ".lastUpdated";

    private static final String TOUCHFILE_NAME = "resolver-status.properties";

    @Override
    public boolean isUpdateRequired(Artifact artifact, ArtifactRepository repository) {

            doColumn("jobName");
        }

        public void columnJobStatus() {
            doColumn("jobStatus");
        }

        public void columnLastUpdated() {
            doColumn("lastUpdated");
        }

        public void columnScriptData() {
            doColumn("scriptData");
        }

        public void columnScriptResult() {
            doColumn("scriptResult");
        }