import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpSession;

/**
 * Abstract base class for search-related actions in the Fess search application.
 * Provides common functionality for search operations, including search form handling,
 * label management, user authentication, and search result processing.
 *
 * This class extends FessBaseAction and serves as the foundation for all search-related

A powerful Java library that provides intelligent search suggestion functionality built on top of OpenSearch/Elasticsearch. It offers auto-completion, query suggestions, and popular word analytics for search applications.

## Key Features

    logger.error("Class not found: " + className, e);
}
```

## 🏗️ Architecture & Design Patterns

### Core Design Principles
CoreLib follows a **utility-class pattern** where most functionality is exposed through static methods:

- **Assertion-based validation** - All methods validate inputs using `AssertionUtil.assertArgumentNotNull()` and `AssertionUtil.assertArgumentNotEmpty()`

import java.io.StringWriter;
import java.lang.reflect.Constructor;

import org.dbflute.utflute.core.PlainTestCase;

/**
 * Test class for CrawlerSystemException.
 * Tests all constructors and exception functionality including message, cause, suppression, and stack trace.
 */
public class CrawlerSystemExceptionTest extends PlainTestCase {

    /**
     * Test constructor with message only
     */

import jakarta.annotation.Resource;

/**
 * The assist for login handling in the Fess application.
 * This class extends TypicalLoginAssist to provide Fess-specific login functionality
 * including user authentication, permission checking, and login history management.
 *
 */
public class FessLoginAssist extends TypicalLoginAssist<String, FessUserBean, FessUser> // #change_it also UserBean

import org.junit.jupiter.api.Test;

import jcifs.CIFSContext;
import jcifs.config.PropertyConfiguration;
import jcifs.context.BaseContext;
import jcifs.smb.SmbTransportInternal;

/**
 * Integration tests for RDMA functionality.
 *
 * This class contains both unit tests (that always run) and integration tests
 * (that require system properties to be set for execution).
 *
 * Integration tests require system properties:

import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
 * Unit tests for the {@link AbstractUpgradeGoal} class.
 * Tests the shared functionality across upgrade goals including option handling,
 * .mvn directory creation, and upgrade orchestration.
 */
@DisplayName("AbstractUpgradeGoal")
class AbstractUpgradeGoalTest {

    @TempDir
    Path tempDir;

            }

            @Override
            public void retainPayload() {
                // Implementation for retaining payload
            }
        };

        // Test async functionality
        assertFalse(concreteResponse.isAsync());

        // Test received status
        assertFalse(concreteResponse.isReceived());
        concreteResponse.received();

import java.util.EnumSet;
import java.util.HashSet;
import java.util.Set;

import org.dbflute.utflute.core.PlainTestCase;

/**
 * Test class for CrawlerStatus enum.
 * Tests all enum functionality including values, valueOf, ordinal, and serialization.
 */
public class CrawlerStatusTest extends PlainTestCase {

    /**
     * Test that all expected enum values exist
     */
    public void test_enumValues() {

import java.util.Map;

/**
 * A response list that extends List functionality and includes pagination and search metadata.
 * This class wraps search results with pagination information, facet responses, and query statistics.
 * It implements the List interface to provide standard list operations while adding search-specific
 * functionality such as page navigation, record counts, and query execution times.
 */