XMLParser

package com.bulpros.javaknigths;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import java.io.StringReader;
import java.io.StringWriter;

public class XMLParser<T> implements Marshaller<T> {

    private Class<T> type;

    public XMLParser(Class<T> type){
        this.type = type;
    }

    @Override
    public T read(String text) {
        T item = null;
        try {
            JAXBContext context = JAXBContext.newInstance(type);
            Unmarshaller unmarshaller = context.createUnmarshaller();
            StringReader reader = new StringReader(text);
            item = (T) unmarshaller.unmarshal(reader);
        } catch (JAXBException e) {
            e.printStackTrace();
        }
        return item;    }

    @Override
    public String write(T item) {
        StringWriter writenXml = new StringWriter();
        try {
            JAXBContext context = JAXBContext.newInstance(type);
            javax.xml.bind.Marshaller marshaller = context.createMarshaller();
            marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
            marshaller.marshal(item, writenXml);
        } catch (JAXBException e) {
            e.printStackTrace();
        }
        return writenXml.toString();
    }
}