tutorial1.java

服务器开发资料； 这是一个面向对象数据库

/*
NeoDatis ODB : Native Object Database ([e-mail])
Copyright (C) 2007 NeoDatis Inc. http://www.neodatis.org

This file is part of the db4o open source object database.

NeoDatis ODB is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

NeoDatis ODB is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.neodatis.odb.tutorial;

import java.util.Date;

import org.neodatis.odb.core.ODBAuthenticationRuntimeException;
import org.neodatis.odb.core.OID;
import org.neodatis.odb.core.Objects;
import org.neodatis.odb.core.query.IQuery;
import org.neodatis.odb.core.query.criteria.CriteriaQuery;
import org.neodatis.odb.core.query.criteria.Where;
import org.neodatis.odb.core.query.nq.SimpleNativeQuery;
import org.neodatis.odb.main.ODB;
import org.neodatis.odb.main.ODBFactory;
import org.neodatis.odb.tool.IOUtil;
import org.neodatis.odb.xml.XMLExporter;
import org.neodatis.odb.xml.XMLImporter;

public class Tutorial1 {
	public static final String ODB_NAME = "tutorial1.odb";

	public static final String ODB_NAME_2 = "tutorial1bis.odb";

	public Tutorial1() throws Exception {
		clearDatabase();
	}

	public void step1() throws Exception {

		// Create instance
		Sport sport = new Sport("volley-ball");

		ODB odb = null;

		try {
			// Open the database
			odb = ODBFactory.open(ODB_NAME);

			// Store the object
			odb.store(sport);
		} finally {
			if (odb != null) {
				// Close the database
				odb.close();
			}
		}
	}

	public void step2() throws Exception {

		// Create instance
		Sport volleyball = new Sport("volley-ball");

		// Create 4 players
		Player player1 = new Player("olivier", new Date(), volleyball);
		Player player2 = new Player("pierre", new Date(), volleyball);
		Player player3 = new Player("elohim", new Date(), volleyball);
		Player player4 = new Player("minh", new Date(), volleyball);

		// Create two teams
		Team team1 = new Team("Paris");
		Team team2 = new Team("Montpellier");

		// Set players for team1
		team1.addPlayer(player1);
		team1.addPlayer(player2);

		// Set players for team2
		team2.addPlayer(player3);
		team2.addPlayer(player4);

		// Then create a volley ball game for the two teams
		Game game = new Game(new Date(), volleyball, team1, team2);

		ODB odb = null;

		try {
			// Open the database
			odb = ODBFactory.open(ODB_NAME);

			// Store the object
			odb.store(game);
		} finally {
			if (odb != null) {
				// Close the database
				odb.close();
			}
		}
	}

	/** Criteria Query */
	public void step3() throws Exception {
		ODB odb = null;

		try {
			// Open the database
			odb = ODBFactory.open(ODB_NAME);
			IQuery query = new CriteriaQuery(Player.class, Where.equal("name", "olivier"));
			Objects players = odb.getObjects(query);

			System.out.println("\nStep 3 : Players with name olivier");

			int i = 1;
			// display each object
			while (players.hasNext()) {
				System.out.println((i++) + "\t: " + players.next());
			}
		} finally {
			if (odb != null) {
				// Close the database
				odb.close();
			}
		}
	}

	/**
	 * Where query with relations
	 * 
	 */
	public void step4() throws Exception {

		ODB odb = null;

		try {
			// Open the database
			odb = ODBFactory.open(ODB_NAME);
			// Let's insert a tennis player
			Player agassi = new Player("Andr