}

        final String[] searchers = DocumentUtil.getValue(docMap, Constants.SEARCHER, String[].class);
        if (searchers != null) {
            docMap.put(Constants.SEARCHER, ArrayUtil.add(searchers, getName()));
        } else {
            docMap.put(Constants.SEARCHER, new String[] { getName() });
        }

        return docMap;
    }

            return parent.toString();
        }
    }

    public void setSeacher(final RankFusionSearcher searcher) {
        this.searchers[0] = searcher;
    }

    public void register(final RankFusionSearcher searcher) {
        if (logger.isDebugEnabled()) {
            logger.debug("Load {}", searcher.getClass().getSimpleName());
        }

public abstract class RankFusionSearcher {
    protected String name;

    public String getName() {
        if (name == null) {
            name = StringUtil.decamelize(this.getClass().getSimpleName().replace("Searcher", StringUtil.EMPTY)).toLowerCase(Locale.ENGLISH);
        }
        return name;
    }

    protected abstract SearchResult search(String query, SearchRequestParams params, OptionalThing<FessUserBean> userBean);

    public static final Boolean T = true;

    public static final Boolean F = false;

    public static final String SCORE = "score";

    public static final String SEARCHER = "searcher";

    public static final String ON = "on";

    public static final String READY = "ready";

    public static final String RUNNING = "running";

    public static final String DONE = "done";