* @param badWord Bad word
     * @return Validation error
     */
    protected String getValidationError(final String badWord) {
        if (Strings.isNullOrEmpty(badWord)) {
            return "badWord was empty.";
        }
        if (badWord.contains(" ") || badWord.contains("  ")) {
            return "badWord contains space.";
        }
        return null;
    }

    /**

                    }
                    buf.append(getResultDataBody(entry.getKey(), obj.toString()));
                    break;
                }
            } catch (final XPathException e) {
                logger.warn("Could not parse value for key: " + entry.getKey() + " with XPath: " + entry.getValue(), e);
            }
        }
        buf.append(getAdditionalData(responseData, document));
        buf.append(getResultDataFooter());

        for (final ComponentHolder<?> componentHolder : singletonMap.values()) {
            try {
                componentHolder.destroy();
            } catch (final Exception e) {
                logger.warn("Failed to destroy " + componentHolder.get(), e);
            }
        }
    }

    /**
     * Registers a prototype component with the specified name, class, and initializer.

      by such Contributor that are necessarily infringed by their
      Contribution(s) alone or by combination of their Contribution(s)
      with the Work to which such Contribution(s) was submitted. If You
      institute patent litigation against any entity (including a
      cross-claim or counterclaim in a lawsuit) alleging that the Work
      or a Contribution incorporated within the Work constitutes direct

    public void close() {
        clientMap.values().stream().distinct().forEach(client -> {
            try {
                client.close();
            } catch (final Exception e) {
                logger.warn("Failed to close {}.", client.getClass().getCanonicalName(), e);
            }
        });
    }

            });
            if (putMappingResponse.isAcknowledged()) {
                logger.info("Created {} mapping.", index);
            } else {
                logger.warn("Failed to create {} mapping.", index);
            }
        } else if (logger.isDebugEnabled()) {
            logger.debug("{} mapping exists.", index);
        }
    }

    /**

     */
    protected void disconnectInternalClient(final FTPClient client) {
        try {
            client.disconnect();
        } catch (final IOException e) {
            logger.warn("Failed to close FTPClient", e);
        }
    }

    /**
     * Updates the response data based on the FTP file information.
     * This method handles different file types (files, directories, symbolic links)

     * Shuts down the thread pool.
     */
    public void shutdown() {
        threadPool.shutdownNow();
    }

    /**
     * Creates a new index if no index exists.
     * @return True if an index was created, false otherwise.
     */
    public boolean createIndexIfNothing() {
        try {
            boolean created = false;
            final IndicesExistsResponse response =

                final File file = dfos.getFile();
                try {
                    Files.delete(file.toPath());
                } catch (final IOException e) {
                    logger.warn("Failed to delete {}.", file.getAbsolutePath(), e);
                }
            }
        }

    }

    /**
     * Detects the MIME type of the content.
     *

                    return defaultValue;
                }

                return convertObj(paramValue, clazz);
            } catch (final Exception e) {
                logger.warn("Could not load init parameters: " + key + " from " + initParamMap, e);
            }
        }
        return defaultValue;
    }

    /**
     * Converts an object to the specified class type.