import org.json.JSONObject;
import org.json.XML;

public class DataConverter {

    public String xmlToJson(String xmlData) {
        JSONObject jsonObject = XML.toJSONObject(xmlData);
        return jsonObject.toString();
    }

    public String jsonToXml(String jsonData) {
        JSONObject jsonObject = new JSONObject(jsonData);
        return XML.toString(jsonObject);
    }

    public static void main(String[] args) {
        DataConverter converter = new DataConverter();

        String xmlData = "<payment><amount>100</amount><currency>USD</currency></payment>";
        String jsonData = converter.xmlToJson(xmlData);
        System.out.println("JSON Data: " + jsonData);

        String xmlConvertedBack = converter.jsonToXml(jsonData);
        System.out.println("XML Data: " + xmlConvertedBack);
    }
}

interface DataAdapter {
    String convert(String data);
}

class XmlToJsonAdapter implements DataAdapter {
    @Override
    public String convert(String xmlData) {
        return XML.toJSONObject(xmlData).toString();
    }
}

class JsonToXmlAdapter implements DataAdapter {
    @Override
    public String convert(String jsonData) {
        return XML.toString(new JSONObject(jsonData));
    }
}

class DataConversionManager {
    private DataAdapter adapter;

    public void setAdapter(DataAdapter adapter) {
        this.adapter = adapter;
    }

    public String convertData(String data) {
        return adapter.convert(data);
    }
}

public class Main {
    public static void main(String[] args) {

        DataConversionManager manager = new DataConversionManager();

        manager.setAdapter(new XmlToJsonAdapter());
        String xmlData = "<payment><amount>100</amount><currency>USD</currency></payment>";
        String jsonData = manager.convertData(xmlData);
        System.out.println("JSON Data: " + jsonData);

        manager.setAdapter(new JsonToXmlAdapter());
        String xmlConvertedBack = manager.convertData(jsonData);
        System.out.println("XML Data: " + xmlConvertedBack);
    }
}