/// <summary>
/// How to insert a complex object in NeoDatis Database
/// </summary>
public void Step2()
{
// Create instance
Sport volleyball = new Sport("volley-ball");
// Create 4 players
Player player1 = new Player("olivier", new DateTime(), volleyball);
Player player2 = new Player("pierre", new DateTime(), volleyball);
Player player3 = new Player("elohim", new DateTime(), volleyball);
Player player4 = new Player("minh", new DateTime(), 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 DateTime(), 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();
}
}
}
public void AddPlayer(Player player)
{
players.Add(player);
}
/// <summary>
/// How to delete an object using OID
/// </summary>
public void Step14() {
ODB odb = null;
try {
// Open the database
odb = ODBFactory.Open(ODB_NAME);
Sport tennis = odb.GetObjects<Sport>(new CriteriaQuery(typeof(Sport), Where.Equal("name", "Tennis"))).GetFirst();
// Firts re-create Agassi player - it has been deleted in step 13
Player agassi = new Player("Andr\u00E9 Agassi", new DateTime(), tennis);
odb.Store(agassi);
odb.Commit();
IQuery query = new CriteriaQuery(typeof(Player), Where.Like("name", "%Agassi"));
Objects<Player> players = odb.GetObjects<Player>(query);
// Gets the first player (there is only one!)
agassi = players.GetFirst();
OID agassiId = odb.GetObjectId(agassi);
odb.DeleteObjectWithId(agassiId);
odb.Close();
odb = ODBFactory.Open(ODB_NAME);
// Now query the databas eto check the change
players = odb.GetObjects<Player>();
Console.WriteLine("\nStep 14 : Deleting players");
int i = 1;
// display each object
while (players.HasNext()) {
Console.WriteLine((i++) + "\t: " + players.Next());
}
} finally {
if (odb != null) {
// Close the database
odb.Close();
}
}
}
/// <summary>
/// How to retrieve objects using Criteria queries traversing relations
/// </summary>
public void Step4() {
ODB odb = null;
try {
// Open the database
odb = ODBFactory.Open(ODB_NAME);
// Let's insert a tennis player
Player agassi = new Player("Andr\u00E9 Agassi", new DateTime(), new Sport("Tennis"));
odb.Store(agassi);
IQuery query = new CriteriaQuery(typeof(Player), Where.Equal("favoriteSport.name", "volley-ball"));
Objects<Player> players = odb.GetObjects<Player>(query);
Console.WriteLine("\nStep 4 : Players of Voller-ball");
int i = 1;
// display each object
while (players.HasNext()) {
Console.WriteLine((i++) + "\t: " + players.Next());
}
} finally {
if (odb != null) {
// Close the database
odb.Close();
}
}
}