* Displays the form for duplicating an existing file crawler configuration.
     *
     * @param id the ID of the file config to duplicate
     * @return HTML response for the file config creation form pre-populated with duplicated values
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse duplicate(final String id) {
        saveToken();

/**
 * Service class for managing duplicate host configuration CRUD operations.
 * This service provides functionality to create, read, update, and delete
 * duplicate host configurations used by the Fess crawler system.
 *
 * <p>Duplicate host configurations allow administrators to define hostname patterns
 * that should be treated as equivalent during crawling. This helps avoid indexing

import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin duplicate host management.
 * Provides RESTful API endpoints for managing duplicate host settings in the Fess search engine.
 * Duplicate host settings help prevent indexing the same content from multiple similar URLs.
 *
 */
public class ApiAdminDuplicatehostAction extends FessApiAdminAction {

     * Displays the form for duplicating an existing web crawler configuration.
     *
     * @param id the ID of the web config to duplicate
     * @return HTML response for the web config creation form pre-populated with duplicated values
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse duplicate(final String id) {
        saveToken();
        return asEditHtml().useForm(CreateForm.class, op -> {

    E duplicate = arrayAndDuplicate.duplicate;

    int firstIndex = getList().indexOf(duplicate);
    int initialSize = getList().size();
    assertTrue("remove(present) should return true", getList().remove(duplicate));
    assertTrue(
        "After remove(duplicate), a list should still contain the duplicate element",
        getList().contains(duplicate));
    assertFalse(

            assertEquals(1, dependencyElements.size(), "Should have only one dependency after duplicate removal");
        }
    }

    @Nested
    @DisplayName("Duplicate Plugin Fixes")
    class DuplicatePluginFixesTests {

        @Test
        @DisplayName("should remove duplicate plugins in pluginManagement")
        void shouldRemoveDuplicatePluginsInPluginManagement() throws Exception {

    /**
     * Displays the initial duplicate host management page.
     *
     * @param form the search form
     * @return HTML response for the duplicate host list page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index(final SearchForm form) {
        return asListHtml();
    }

    /**
     * Displays the duplicate host list with pagination.
     *

/**
 * Pager for duplicate host management with standard paging functionality.
 * This class provides pagination support for duplicate host listings in the admin interface,
 * including navigation controls and search/filter parameters.
 *
 * <p>Duplicate hosts allow administrators to define hostname patterns that should
 * be treated as equivalent during crawling, helping to avoid duplicate content

    E duplicate = arrayAndDuplicate.duplicate;

    int firstIndex = getList().indexOf(duplicate);
    int initialSize = getList().size();
    assertTrue("remove(present) should return true", getList().remove(duplicate));
    assertTrue(
        "After remove(duplicate), a list should still contain the duplicate element",
        getList().contains(duplicate));
    assertFalse(

import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.Size;

/**
 * Form class for creating new duplicate host configuration entries.
 * This form handles the creation of duplicate host mappings that redirect
 * crawling from duplicate hostnames to the regular canonical hostname.
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */