*   The resolve and reject methods decrement the CountDownLatch, allowing the getResponse method
 *   to return the result of the computation.
 * </p>
 *
 * @param <RESPONSE> The type of the response.
 */
public class Deferred<RESPONSE extends Response> {
    /**
     * Constructs a new Deferred object.
     */
    public Deferred() {
        // nothing
    }

        }
        return deferred.promise();
    }

    /**
     * Processes the request.
     * @param client The OpenSearch client.
     * @param deferred The Deferred object to resolve or reject the response.
     */
    protected abstract void processRequest(Client client, Deferred<T> deferred);

    /**
     * Returns a validation error message, or null if there are no errors.

    }

    /**
     * Wraps an object instance into a pooled object.
     * @param obj The object to wrap
     * @return A PooledObject wrapping the given object
     */
    @Override
    public PooledObject<T> wrap(final T obj) {
        return new DefaultPooledObject<>(obj);
    }

    /**
     * Destroys a pooled object and notifies the destroy listener if set.

import org.codelibs.fess.crawler.exception.CrawlingAccessException;

/**
 * The BinaryTransformer class is responsible for transforming binary data from a ResponseData object
 * into a ResultData object, and for retrieving the binary data from an AccessResultData object.
 * It extends the AbstractTransformer class.
 *
 * <p>
 * This transformer extracts the binary content from the response body of a web resource,

                    deferred.reject(new SuggesterException("Search failure. Failed shards num:" + searchResponse.getFailedShards()));
                } else {
                    deferred.resolve(createResponse(searchResponse));
                }
            }

            @Override
            public void onFailure(final Exception e) {
                deferred.reject(e);
            }
        });
    }

 *
 * <p>
 * The class is a singleton, and is injected using the {@link Resource} annotation.
 * </p>
 *
 */
public class DataServiceImpl implements DataService<AccessResultImpl<Long>> {

    /** Counter for generating unique IDs */
    protected static volatile long idCount = 0L;

    /** Lock object for synchronizing access to idCount */
    private static Object idCountLock = new Object();

    /** The raw data. */
    protected Object rawData = null;

    /** The serializer. */
    protected Function<Object, byte[]> serializer;

    /**
     * Creates a new ResultData instance.
     */
    public ResultData() {
        super();
    }

    /**
     * Set the raw data.
     * @param rawData the raw data object to set
     */
    public void setRawData(final Object rawData) {

    /**
     * Indicates whether some other object is equal to this one.
     *
     * @param obj the reference object with which to compare
     * @return true if this object is the same as the obj argument; false otherwise
     */
    @Override
    public boolean equals(final Object obj) {
        return inputStream.equals(obj);
    }

    /**
     * Returns a hash code value for the object.
     *

    }

    /**
     * Adds an FtpAuthentication object to the holder.
     * @param auth The FtpAuthentication object to add.
     */
    public void add(final FtpAuthentication auth) {
        if (auth != null) {
            authenticationList.add(auth);
        }
    }

    /**
     * Retrieves an FtpAuthentication object that matches the given path.
     * @param path The path to match.

        }
    }

    public void test_setSerializer() {
        // ## Arrange ##
        final ResultData resultData = new ResultData();
        final Function<Object, byte[]> serializer = new Function<Object, byte[]>() {
            @Override
            public byte[] apply(Object t) {
                return t.toString().getBytes();
            }
        };

        // ## Act ##
        resultData.setSerializer(serializer);