method.setAccessible(true);

        final RenderData renderData = new RenderData();
        method.invoke(action, renderData);

        @SuppressWarnings("unchecked")
        final List<String> extraFieldNames = (List<String>) renderData.getDataMap().get("extraFieldNames");
        assertNotNull(extraFieldNames);

import org.lastaflute.web.response.render.RenderData;

public class RenderDataUtilTest extends UnitFessTestCase {

    @Test
    public void test_register_null() {
        RenderData data = new RenderData();
        RenderDataUtil.register(data, "key1", null);
        assertNull(data.getDataMap().get("key1"));
    }

    @Test
    public void test_register_string() {
        RenderData data = new RenderData();

     * @param data The render data.
     */
    protected void registerRolesAndLabels(final RenderData data) {
        RenderDataUtil.register(data, "roleTypeItems", roleTypeService.getRoleTypeList());
    }

    /**
     * Register handler names.
     * @param data The render data.
     */
    protected void registerHandlerNames(final RenderData data) {
        final String[] dataStoreNames = dataStoreFactory.getDataStoreNames();

     */
    protected void registerEnvItems(final RenderData data) {
        RenderDataUtil.register(data, "envItems", getEnvItems());
    }

    /**
     * Registers system properties for rendering.
     *
     * @param data the render data to populate
     */
    protected void registerPropItems(final RenderData data) {
        RenderDataUtil.register(data, "propItems", getPropItems());
    }

import java.util.stream.Collectors;

import org.codelibs.core.beans.util.BeanUtil;
import org.dbflute.Entity;
import org.lastaflute.web.response.render.RenderData;

/**
 * Utility class for managing render data in web responses.
 * This class provides methods to register values in RenderData objects with proper handling
 * of Entity objects and Collections that may contain Entity objects.
 *
 */
public class RenderDataUtil {

    /**

            body.q = Constants.MATCHES_ALL_QUERY;
        }

        final SearchRenderData renderData = new SearchRenderData();
        body.initialize();
        try {
            searchHelper.search(body, renderData, getUserBean());
            return asJson(new ApiDocsResponse().renderData(renderData).status(Status.OK).result());
        } catch (final InvalidQueryException e) {
            if (logger.isDebugEnabled()) {

        }
        final WebRenderData renderData = new WebRenderData();
        form.initialize();
        request.setAttribute(Constants.SEARCH_LOG_ACCESS_TYPE, Constants.SEARCH_LOG_ACCESS_TYPE_ADMIN);
        try {
            searchHelper.search(form, renderData, getUserBean());
            return asListHtml().renderWith(data -> {
                renderData.register(data);
            });

import org.dbflute.optional.OptionalEntity;
import org.dbflute.optional.OptionalThing;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.response.render.RenderData;
import org.lastaflute.web.ruts.process.ActionRuntime;

import jakarta.annotation.Resource;

/**
 * Admin action for File Config management.
 *
 */

import org.dbflute.optional.OptionalEntity;
import org.dbflute.optional.OptionalThing;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.response.render.RenderData;
import org.lastaflute.web.ruts.process.ActionRuntime;

import jakarta.annotation.Resource;

/**
 * Admin action for Web Authentication management.
 *
 */

import org.dbflute.optional.OptionalEntity;
import org.dbflute.optional.OptionalThing;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.response.render.RenderData;
import org.lastaflute.web.ruts.process.ActionRuntime;

import jakarta.annotation.Resource;

/**
 * Admin action for Web Config management.
 *
 */
public class AdminWebconfigAction extends FessAdminAction {