*
 * Character mapping files contain mapping rules in the format:
 * input1,input2,... => output
 */
public class CharMappingFile extends DictionaryFile<CharMappingItem> {
    /** Logger instance for this class. */
    private static final Logger logger = LogManager.getLogger(CharMappingFile.class);

    /** Type identifier for character mapping dictionaries. */
    private static final String MAPPING = "mapping";

                }
            }
        };
        ComponentUtil.register(dictionaryManager, "dictionaryManager");

        // Initialize CharMappingFile
        charMappingFile = new CharMappingFile("test_id", testFile.getAbsolutePath(), new Date());
        charMappingFile.manager(dictionaryManager);
    }

    @Override
    public void tearDown() throws Exception {
        if (testFile != null && testFile.exists()) {

     */
    public OptionalEntity<CharMappingFile> getCharMappingFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId)
                .filter(CharMappingFile.class::isInstance)
                .map(file -> OptionalEntity.of((CharMappingFile) file))
                .orElse(OptionalEntity.empty());
    }

    /**

                                    <label for="charMappingFile" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.dict_mapping_file"/></label>
                                    <div class="col-sm-9">
                                        <input type="file" id="charMappingFile" name="charMappingFile" class="form-control-file"/>
                                    </div>

        dictionaryManager.addCreator(this);
    }

    @Override
    protected DictionaryFile<? extends DictionaryItem> newDictionaryFile(final String id, final String path, final Date timestamp) {
        return new CharMappingFile(id, path, timestamp).manager(dictionaryManager);
    }

     * The multipart file containing the character mapping rules to be uploaded.
     * This file should contain character mapping definitions for text normalization.
     */
    @Required
    public MultipartFormFile charMappingFile;

    /**
     * Default constructor for UploadForm.
     * Creates a new instance with default values.
     */
    public UploadForm() {
        // Default constructor
    }

        validateApi(form, messages -> {});
        final CharMappingFile file = charMappingService.getCharMappingFile(form.dictId).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL));
            return null;
        });
        try (InputStream inputStream = form.charMappingFile.getInputStream()) {
            file.update(inputStream);

        verifyToken(() -> uploadpage(form.dictId));
        return charMappingService.getCharMappingFile(form.dictId).map(file -> {
            try (InputStream inputStream = form.charMappingFile.getInputStream()) {
                file.update(inputStream);
            } catch (final IOException e) {
                logger.warn("Failed to process a request.", e);