import org.lastaflute.web.Execute;
import org.lastaflute.web.response.ActionResponse;
import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.response.StreamResponse;

import jakarta.annotation.Resource;

/**
 * Action class for handling document redirection requests.
 * This action processes "go" requests that redirect users to specific documents

import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
import org.codelibs.fess.opensearch.config.exentity.RelatedQuery;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin related query management.
 * Provides REST endpoints for managing related search queries.
 */
public class ApiAdminRelatedqueryAction extends FessApiAdminAction {

Remember I told you before that `Annotated` can be used to add metadata to your parameters in the [Python Types Intro](../python-types.md#type-hints-with-metadata-annotations){.internal-link target=_blank}?

Now it's the time to use it with FastAPI. 🚀

We had this type annotation:

//// tab | Python 3.10+

```Python
q: str | None = None
```

////

//// tab | Python 3.9+

```Python
q: Union[str, None] = None

import org.apache.logging.log4j.Logger;
import org.codelibs.core.beans.util.BeanUtil;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.annotation.Secured;
import org.codelibs.fess.app.pager.CharMappingPager;
import org.codelibs.fess.app.service.CharMappingService;
import org.codelibs.fess.app.web.CrudMode;
import org.codelibs.fess.app.web.admin.dict.AdminDictAction;

import org.codelibs.fess.dict.mapping.CharMappingItem;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;
import org.lastaflute.web.response.StreamResponse;

import jakarta.annotation.Resource;

/**
 * API action for CRUD and file operations on dictionary character mappings.
 */
public class ApiAdminDictMappingAction extends FessApiAdminAction {

    /**
     * Default constructor.

 * limitations under the License.
 */
@file:Suppress(
  "CANNOT_OVERRIDE_INVISIBLE_MEMBER",
  "INVISIBLE_MEMBER",
  "INVISIBLE_REFERENCE",
)

package okhttp3

import android.annotation.SuppressLint
import java.util.concurrent.ThreadFactory
import java.util.concurrent.TimeUnit
import java.util.logging.Handler
import java.util.logging.Level
import java.util.logging.LogManager

import org.lastaflute.di.core.exception.ComponentNotFoundException;
import org.lastaflute.di.core.factory.SingletonLaContainerFactory;
import org.lastaflute.web.util.LaRequestUtil;

import jakarta.annotation.PostConstruct;

/**
 * Helper class for path mapping configuration.
 */
public class PathMappingHelper extends AbstractConfigHelper {

    /**
     * Default constructor.
     */

import com.google.common.collect.Iterables;
import com.google.common.testing.EqualsTester;
import com.google.common.testing.NullPointerTester;
import com.google.errorprone.annotations.Keep;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Constructor;
import java.lang.reflect.GenericDeclaration;
import java.lang.reflect.Method;

import org.codelibs.fess.helper.ProcessHelper;
import org.codelibs.fess.opensearch.config.exentity.FailureUrl;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin failure URL.
 *
 */
public class ApiAdminFailureurlAction extends FessApiAdminAction {

import org.codelibs.core.stream.StreamUtil;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.opensearch.search.aggregations.BucketOrder;

import jakarta.annotation.PostConstruct;

/**
 * Entity class representing facet configuration information for search results.
 * This class holds configuration settings for faceted search including field facets,