public synchronized void insert(final CharMappingItem item) {
        try (MappingUpdater updater = new MappingUpdater(item)) {
            reload(updater);
        }
    }

    /**
     * Updates an existing character mapping item in the dictionary file.
     *
     * @param item the character mapping item to update
     */
    @Override
    public synchronized void update(final CharMappingItem item) {

                        if (values == null || values.length == 0 || StringUtil.isEmpty(values[0])) {
                            if (logger.isDebugEnabled()) {
                                logger.debug("Required parameter '{}' is missing or empty. Skip storing search parameters.", name);
                            }
                            return true;
                        }
                        return false;
                    }))) {