ContainerXstreamDao.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 java.util.ArrayList;
import java.util.List;

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

import com.thoughtworks.xstream.XStream;

public class ContainerXstreamDao {

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

    public static void persist(final Container container) {
        XStream xstream = getXStream();
        String xml = xstream.toXML(container);
        try {
            File containerDir = Environment.getContainersDir();
            File file =
                new File(containerDir, container.getName() + ".xml");
            FileWriter writer = new FileWriter(file);
            writer.write(xml);
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static List<Container> getContainers() {
        ArrayList<Container> containers = new ArrayList<Container>();
        File containersDir = Environment.getContainersDir();

        String[] children = containersDir.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$", "");
                containers.add(getContainer(name));
            }
        }

        return containers;
    }

    public static Container getContainer(final String name) {
        XStream xstream = getXStream();

        File containersDir = Environment.getContainersDir();
        File file = new File(containersDir, name + ".xml");
        FileInputStream is = null;
        try {
            is = new FileInputStream(file);
            Container container = (Container) xstream.fromXML(is);
            return container;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }finally {
            if (is != null)
                IOUtils.closeQuietly(is);
        }
        return null;
    }

    public static void deleteContainer(final Container container) {
        File file =
            new File(Environment.getContainersDir(), container.getName()
                + ".xml");
        file.delete();
    }
}