ConfigXstreamDao.java

package org.apache.wicket.persistence.provider;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;


import org.apache.wicket.util.io.IOUtils;
import org.jabox.environment.Environment;
import org.jabox.model.DefaultConfiguration;

import com.thoughtworks.xstream.XStream;

public class ConfigXstreamDao {

    private static XStream getXStream() {
        XStream xstream = new XStream();
        xstream.alias("config", DefaultConfiguration.class);
        return xstream;
    }

    public static void persist(DefaultConfiguration config) {
        XStream xstream = getXStream();
        String xml = xstream.toXML(config);
        try {
            File dir = Environment.getBaseDirFile();
            File file = new File(dir, "config.xml");
            FileWriter writer = new FileWriter(file);
            writer.write(xml);
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static DefaultConfiguration getConfig() {
        XStream xstream = getXStream();

        File dir = Environment.getBaseDirFile();
        File file = new File(dir, "config.xml");

        FileInputStream is = null;
        try {
            is = new FileInputStream(file);
            DefaultConfiguration config =
                (DefaultConfiguration) xstream.fromXML(is);
            return config;
        } catch (FileNotFoundException e) {
            DefaultConfiguration config = new DefaultConfiguration();
            ConfigXstreamDao.persist(config);
            return config;
        }finally {
            if (is != null)
              IOUtils.closeQuietly(is);
        }

    }
}