asolntsev

public static String findBranchHeadRevision( ScmFileHistory file, String revisionNumber) {
  String sRevBase = revisionNumber.replaceFirst("(.*)\\.0(\\.\\d+)", "$1$2."); // sRevBase = "1.3.2."
  String sBranchHead = revisionNumber.replaceFirst("(.*)\\.0\\.\\d+", "$1");   // sBranchHead = "1.3"

  int maxRevNum = -1;

  for (String rev : file.getRevisions()) { // Loop all revisions
    if (rev.startsWith(sRevBase))
    {
      String tail = rev.substring(sRevBase.length());
      if (tail.indexOf('.') == -1) {
        int num = Integer.parseInt(tail);
        if (num > maxRevNum) {
          maxRevNum = num;
          sBranchHead = rev;   // sBranchHead = "1.3.2.1", then "1.3.2.3", and finally "1.3.2.4"
        }
      }
    }
  }

  return sBranchHead;
}