/**
     * Checks if this generator can handle the given document.
     * @param docMap The document map containing metadata.
     * @return True if this generator can handle the document, false otherwise.
     */
    boolean isTarget(Map<String, Object> docMap);

    /**
     * Checks if this thumbnail generator is available for use.
     * @return True if available, false otherwise.

        }
        return false;
    }

    /**
     * Gets the image filename for a document based on its document map.
     *
     * @param docMap the document data map
     * @return the generated image filename
     */
    protected String getImageFilename(final Map<String, Object> docMap) {

     *
     * @param path the file path or URL of the document
     * @param docMap the document metadata map containing field values
     * @return a tuple containing the generator name, thumbnail ID, and path
     */
    @Override
    public Tuple3<String, String, String> createTask(final String path, final Map<String, Object> docMap) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

            if (source != null) {
                final Map<String, Object> docMap = new HashMap<>(source);
                docMap.put(fessConfig.getIndexFieldId(), hit.getId());
                docMap.put(fessConfig.getIndexFieldVersion(), hit.getVersion());
                docMap.put(fessConfig.getIndexFieldSeqNo(), hit.getSeqNo());
                docMap.put(fessConfig.getIndexFieldPrimaryTerm(), hit.getPrimaryTerm());

    }

    public void test_calculateDocumentSize_withNullValue() {
        final Map<String, Object> docMap = new HashMap<>();
        docMap.put("id", "test");
        docMap.put("nullField", null);

        long size = indexingHelper.calculateDocumentSize(docMap);
        assertTrue(size > 0);
    }

     * Extracts and formats the site path from document URL.
     *
     * @param docMap the document data map
     * @return the formatted site path
     */
    public Object getSitePath(final Map<String, Object> docMap) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final Object siteValue = docMap.get(fessConfig.getIndexFieldSite());
        if (siteValue != null) {