ServerXstreamDao.java

package org.apache.wicket.persistence.provider;

import java.io.*;
import java.util.ArrayList;
import java.util.List;

import org.apache.wicket.util.io.IOUtils;
import org.jabox.apis.ConnectorConfig;
import org.jabox.environment.Environment;
import org.jabox.model.Server;

import com.thoughtworks.xstream.XStream;

public class ServerXstreamDao {

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

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

    public static List<ConnectorConfig> getServers(
            Class<? extends ConnectorConfig> clas) {
        ArrayList<ConnectorConfig> servers =
            new ArrayList<ConnectorConfig>();
        File dir = Environment.getServersDir();

        String[] children = dir.list();
        if (children == null) {
            // Either dir does not exist or is not a directory
        } else {
            for (int i = 0; i < children.length; i++) {
                // Get filename of file or directory
                String filename = children[i];
                String name = filename.replaceAll(".xml$", "");

                ConnectorConfig server = getServer(name);
                // Just add the Servers of the specific Class
                if (clas.isAssignableFrom(server.getClass())) {
                    servers.add(server);
                }
            }
        }

        return servers;
    }

    public static ConnectorConfig getServer(String name) {
        XStream xstream = getXStream();

        File dir = Environment.getServersDir();
        File file = new File(dir, name + ".xml");

        FileInputStream is = null;
        try {
            is = new FileInputStream(file);
            ConnectorConfig server = (ConnectorConfig) xstream.fromXML(is);
            return server;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (is != null)
              IOUtils.closeQuietly(is);
        }
        return null;
    }

    public static boolean deleteServer(Server server) {
        File file =
            new File(Environment.getServersDir(), server.getName()
                + ".xml");
        return file.delete();
    }
}