UtilXml.java

package br.com.atl.passepartout;

import java.nio.file.Path;
import java.nio.file.Paths;
import java.sql.Date;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.PropertyException;
import javax.xml.bind.Unmarshaller;

public class UtilXml {

//  private static final Logger LOG = Logger.getAnonymousLogger();

    private static final String PATH = //
    Paths.get(System.getProperty("user.home"), "passepartout").toString();

    public static Object load(Class<?> cls) throws Exception {
        String fname = cls.getSimpleName() + ".xml";
        return load(cls, fname);
    }

    public static Object load(Class<?> cls, Date d) throws Exception {
        String fname = d.toString() + "-" + cls.getSimpleName() + ".xml";
        return load(cls, fname);
    }

    private static Object load(Class<?> cls, String fname) throws Exception {
        Path p = Paths.get(PATH, fname);
        if (!p.toFile().exists()) {
            p.toFile().getParentFile().mkdirs();
            p.toFile().createNewFile();
            Object o = cls.newInstance();
            save(cls, o, fname);
        }
        JAXBContext ctx = JAXBContext.newInstance(cls);
        Unmarshaller u = ctx.createUnmarshaller();
        Object o = u.unmarshal(p.toFile());
        return o;
    }

    public static void save(Class<?> cls, Object o) throws Exception {
        String fname = cls.getSimpleName() + ".xml";
        save(cls, o, fname);
    }

    public static void save(Class<?> cls, Object o, Date d) throws Exception {
        String fname = d.toString() + "-" + cls.getSimpleName() + ".xml";
        save(cls, o, fname);
    }

    private static void save(Class<?> cls, Object o, String fname)
            throws JAXBException, PropertyException {
        JAXBContext ctx = JAXBContext.newInstance(cls);
        Marshaller m = ctx.createMarshaller();
        m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        Path p = Paths.get(PATH, fname);
        m.marshal(o, p.toFile());
    }

}