@Override
    public boolean contains(Path path) {
      for (FileStatus fileStatus: getFiles()) {
        if (fileStatus.getPath().equals(path)) {
          return true;
        }
      }
      return false;
    }
DFS dir listing.
Captures a dir and the corresponding list of files it contains,
with additional properties about the dir (like isBase etc)
ql/src/java/org/apache/hadoop/hive/ql/io/AcidUtils.java