/**
 * The abstract transformer for Fess.
 */
public abstract class AbstractFessFileTransformer extends AbstractTransformer implements FessTransformer {

    /**
     * Default constructor.
     */
    public AbstractFessFileTransformer() {
        super();
    }

    private static final Logger logger = LogManager.getLogger(AbstractFessFileTransformer.class);

    /**
     * The mapping for meta content.
     */

        assertEquals("date", Constants.MAPPING_TYPE_DATE);
    }

    /**
     * Testable implementation of AbstractFessFileTransformer for unit testing.
     */
    private static class TestableAbstractFessFileTransformer extends AbstractFessFileTransformer {

        private static final Logger logger = LogManager.getLogger(TestableAbstractFessFileTransformer.class);

        @Override

 * the standard Fess file transformation process with support for various content types.
 *
 * <p>It extends AbstractFessFileTransformer to provide file-specific transformation
 * capabilities while using the appropriate extractor for each document type.</p>
 */
public class FessStandardTransformer extends AbstractFessFileTransformer {
    /**
     * Default constructor.
     */
    public FessStandardTransformer() {
        super();

 * using the Fess file transformation process with support for various file types.
 *
 * <p>It extends AbstractFessFileTransformer to provide specialized file processing
 * capabilities using the appropriate extractor for each file type.</p>
 */
public class FessFileTransformer extends AbstractFessFileTransformer {
    /**
     * Default constructor.
     */
    public FessFileTransformer() {
        super();
    }