*
 * <p>Example usage:</p>
 *
 * <pre>{@code
 * UrlConvertHelper helper = new UrlConvertHelper();
 * helper.add("old-domain.com", "new-domain.com");
 * String convertedUrl = helper.convert("http://old-domain.com/path");
 * // convertedUrl will be "http://new-domain.com/path"
 * }</pre>
 */
/**
 * This class is a helper for URL conversion.
 */
public class UrlConvertHelper {

    /**

public class UrlConvertHelperTest extends PlainTestCase {

    public UrlConvertHelper urlConvertHelper;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        StandardCrawlerContainer container = new StandardCrawlerContainer().singleton("urlConvertHelper", UrlConvertHelper.class);
        urlConvertHelper = container.getComponent("urlConvertHelper");
    }

    public void test_convert() {
        String url;

	"http://dbflute.org/meta/lastadi10.dtd">
<components namespace="fessCrawler">
	<include path="crawler/container.xml" />

	<!-- Converts child links to normalize it. -->
	<component name="urlConvertHelper" class="org.codelibs.fess.crawler.helper.UrlConvertHelper">
	</component>

        if (redirectUrlObj instanceof String) {
            final UrlConvertHelper urlConvertHelper = crawlerContainer.getComponent("urlConvertHelper");
            final String redirectUrl;
            if (urlConvertHelper != null) {
                redirectUrl = urlConvertHelper.convert(redirectUrlObj.toString());
            } else {
                logger.warn("urlConvertHelper is null.");
                redirectUrl = redirectUrlObj.toString();

                .prototype("dataService", DataServiceImpl.class)
                .prototype("urlFilter", UrlFilterImpl.class)
                .singleton("urlConvertHelper", UrlConvertHelper.class)
                .singleton("intervalController", DefaultIntervalController.class)
                .singleton("sitemapsHelper", SitemapsHelper.class)
                .singleton("logHelper", LogHelperImpl.class)

**RobotsTxtHelper**: RFC 9309 parsing, user-agent matching, crawl-delay, sitemaps
**SitemapsHelper**: Sitemap XML parsing, index handling
**MimeTypeHelper**: MIME detection via Tika
**EncodingHelper**: Charset detection with BOM
**UrlConvertHelper**: URL normalization

---

## Development Workflow

### Build Commands

```bash
mvn clean install              # Build all
mvn clean install -DskipTests  # Skip tests