import org.codelibs.fess.suggest.exception.SuggesterException;
import org.codelibs.fess.suggest.request.Response;

/**
 * <p>
 *   Deferred is a class that represents a deferred computation.
 *   It is similar to a Promise in JavaScript.
 *   It allows you to register callbacks that will be executed when the computation is complete,
 *   either successfully (resolve) or with an error (reject).
 * </p>
 *
 * <p>

    public void test_specialProtocols() {
        String sessionId = "test-session-022";
        urlFilter.init(sessionId);

        urlFilter.addInclude("(http|https|ftp|file)://.*");
        urlFilter.addExclude("javascript:.*");
        urlFilter.addExclude("mailto:.*");

        assertTrue(urlFilter.match("http://example.com/"));
        assertTrue(urlFilter.match("https://example.com/"));

    protected int preloadSizeForCharset = 2048;

    /**
     * Pattern for invalid URLs.
     */
    protected Pattern invalidUrlPattern = Pattern.compile("^\\s*javascript:|" //
            + "^\\s*mailto:|" //
            + "^\\s*irc:|" //
            + "^\\s*skype:|" //
            + "^\\s*about:|" + "^\\s*fscommand:|" //
            + "^\\s*aim:|" //