import java.util.ArrayList;
import java.util.List;

public enum XmlCase {
    ROOT(new RootLoader()),
    TOVARY(ROOT, new TovarLoader()),
    KLIENTY(ROOT, new ClientLoader());

    private Loader  loader;
    private XmlCase parent;
    private final List<XmlCase> children = new ArrayList<XmlCase>();

    XmlCase() {
        parent = null;
    }

    /* main method */
    void load(Config config, Object xml) {
        if (config.isSelected(this)) {
            loader.load(xml);
            for (XmlCase caze : children) {
                caze.load(config, xml);
            }
        }
    }

    XmlCase(XmlCase root, Loader loader) {
        this.parent = root;
        this.loader = loader;
        parent.children.add(this);

    }

    XmlCase(Loader loader) {
        this.loader = loader;
    }
}

/* your implementation */
interface Config {
    boolean isSelected(XmlCase caze);
}

/* your implementation */
interface Loader {
    void load(Object xml);
}

/* your implementation */
class RootLoader implements Loader {

    @Override
    public void load(Object xml) {

    }
}

/* your implementation */
class TovarLoader implements Loader {

    @Override
    public void load(Object xml) {

    }
}


/* your implementation */
class ClientLoader implements Loader {

    @Override
    public void load(Object xml) {

    }
}