get ObjectMapper with singleton pattern

ObjectMapperHolder.java

/**
 * get {@code ObjectMapper} with singleton pattern
 * 
 * @author myles
 *
 */
public enum ObjectMapperHolder {

  INSTANCE;

  private final ObjectMapper mapper;

  private ObjectMapperHolder() {
    this.mapper = create();
  }

  public ObjectMapper get() {
    return this.mapper;
  }

  private static ObjectMapper create() {
    ObjectMapper mapper = new ObjectMapper();
    mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
    mapper.configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, false);
    mapper.findAndRegisterModules();
    return mapper;
  }

}