Method snapshot

src/main/java/org/sfj/ChiseledMap.java:520–526

Copy only live entries to another file. Blocks writes to this map while snapshotting. @param f dest file @return new TinyKVMap @throws IOException on exception

(File f)

   * @throws IOException on exception
   */
  public synchronized ChiseledMap<K, V> snapshot(File f) throws IOException {
    ChiseledMap<K, V> ret = new ChiseledMap<>(f, OpenOption.MUST_BE_NEW, comp, encoder, decoder);
    for (Entry<K, V> ent : entries()) {
      ret.ioSet(ent.getKey(), ent.getValue());
    }
    return ret;
  }

  @Override
  public boolean containsKey(Object key) {