RootRequestMapper revisited

package my.package;

import AnotherPage;
import org.apache.wicket.request.IRequestHandler;
import org.apache.wicket.request.IRequestMapper;
import org.apache.wicket.request.Request;
import org.apache.wicket.request.Url;
import org.apache.wicket.request.handler.PageProvider;
import org.apache.wicket.request.handler.RenderPageRequestHandler;
import org.apache.wicket.request.mapper.parameter.PageParameters;

import java.util.List;

public class RootRequestMapper implements IRequestMapper {

    private IRequestMapper defaultMapper = null;
    private IRequestMapper anotherPageMapper = null;

    public RootRequestMapper(final IRequestMapper defaultMapper, final IRequestMapper anotherPageMapper) {
        this.defaultMapper= defaultMapper;
        this.anotherPageMapper= anotherPageMapper;
    }

    private boolean useAnotherPageMapper = false;

    public IRequestHandler mapRequest(Request request) {
        List<String> segments = request.getUrl().getSegments();
        if(!CollectionUtils.isEmpty(segments) && segments.get(0).equals("b")) {
            useAnotherPageMapper = true;
            return anotherPageMapper.mapRequest(request);
        }
        else {
            useAnotherPageMapper = false;
            return defaultMapper.mapRequest(request);
        }
    }

    public int getCompatibilityScore(Request request) {
        return 1;
    }

    public Url mapHandler(IRequestHandler requestHandler) {
        if(useAnotherPageMapper ) {
            Url url = anotherPageMapper.mapHandler(requestHandler);
        }
        else {
            Url url = defaultMapper.mapHandler(requestHandler);
        }
        return url;
    }
}