import java.util.Iterator;
import stomp.jdo.JDOFactory;

public class TestObject
{
	private int _data = 0;

	public void changeData ()
	{
		_data++;
	}

	public int getData ()
	{
		return _data;
	}

	public static void main (String[] args)
	{
		Iterator databaseObjects = JDOFactory.singleton ().getReadOnlyPersistenceManager ().
			getExtent (TestObject.class, true).iterator ();
		if (databaseObjects.hasNext ())
		{
			TestObject databaseObject = (TestObject) databaseObjects.next ();
			System.out.println ("Got a TestObject out of the database!  It has data " + databaseObject.getData ());
			databaseObject.changeData ();
			System.out.println ("Run this class again… the counter should increase by one.");
		}
		else
		{
			JDOFactory.singleton ().persistNewObject (new TestObject ());
			System.out.println ("Added a new TestObject to the database!");
		}
		System.out.println ("Done.");
	}
}