**Purpose**: Verify proper resource management in Extractor implementations.

**Key Test Areas**:
- Resource closure on successful extraction (MS Office extractors)
- Resource closure on failed extraction
- Improved error messages with context
- Input validation using `validateInputStream()`

**Covered Extractors**:
- MsWordExtractor
- MsExcelExtractor
- MsPowerPointExtractor
- TextExtractor

**Test Count**: 8 tests

import org.eclipse.sisu.bean.DeclaredMembers;
import org.eclipse.sisu.bean.DeclaredMembers.View;
import org.eclipse.sisu.plexus.TypeArguments;

/**
 * Optimized version of CompositeBeanHelper with caching for improved performance.
 * This implementation caches method and field lookups to avoid repeated reflection operations.
 */
public final class EnhancedCompositeBeanHelper {

- Update `Smb2CreateRequest/Response` for durable contexts

---

### Phase 3: Multi-Channel Support
**Priority: MEDIUM** | **Estimated Effort: 5-6 weeks**

Multi-channel enables using multiple network connections for improved performance and reliability.

#### 3.1 Core Multi-Channel Infrastructure
```
Package: jcifs.internal.smb2.multichannel
├── ChannelManager.java           - Manage multiple channels per session

        notAnalyzedFieldSet = new HashSet<>();
        Collections.addAll(notAnalyzedFieldSet, fields);
    }

    /**
     * Checks if the specified field can be used for sorting.
     * Uses O(1) Set lookup for improved performance.
     *
     * @param field the field name to check
     * @return true if the field can be used for sorting, false otherwise
     */
    protected boolean isSortField(final String field) {

- **Utility Classes** - All core functionality exposed through static utility methods for easy access

### Performance Optimizations
- **Caching** - Bean descriptors and reflection metadata are cached for improved performance
- **Lazy initialization** - Resources and expensive operations are initialized only when needed  
- **Memory efficient** - Specialized collections like `LruHashMap` and `ArrayMap` for memory-conscious applications

import jakarta.annotation.PostConstruct;

/**
 * Helper class for managing popular words and suggestions.
 * Provides functionality to retrieve popular words based on search parameters
 * and manages caching for improved performance.
 */
public class PopularWordHelper {
    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(PopularWordHelper.class);

    /** Local timezone for time calculations */
    protected TimeZone localTimeZone;
    /** Secure random generator for cryptographic operations */
    protected SecureRandom random;
    /** Whether to use command batching for improved performance */
    protected boolean useBatching = false;
    /** Whether to use Unicode encoding for strings */
    protected boolean useUnicode = true;
    /** Force use of Unicode encoding regardless of negotiation */

import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.exception.ExtractException;
import org.dbflute.utflute.core.PlainTestCase;

/**
 * Enhanced test class for TextExtractor covering improved error messages and edge cases.
 */
public class TextExtractorEnhancedTest extends PlainTestCase {

    private TextExtractor textExtractor;

    @Override
    protected void setUp() throws Exception {

/**
 * Extension methods for SmbFile to support directory leasing functionality.
 *
 * This utility class provides static methods that enhance SmbFile operations with
 * directory leasing capabilities for improved performance through caching when
 * SMB3 directory leasing is available and enabled.
 */
public class SmbFileDirectoryLeasingExtension {

    /**
     * Private constructor to prevent instantiation of this utility class

import org.codelibs.fess.crawler.helper.impl.MimeTypeHelperImpl;
import org.dbflute.utflute.core.PlainTestCase;

/**
 * Test class for archive extractor error handling improvements.
 * Tests partial extraction, error recovery, and improved error messages.
 */
public class ArchiveExtractorErrorHandlingTest extends PlainTestCase {
    private static final Logger logger = LogManager.getLogger(ArchiveExtractorErrorHandlingTest.class);