// add a player to the team, if not already in the team
public void AddPlayer(SoccerPlayer player)
{
if (players == null) // empty
{
players.Add(player);
}
else
{
if (players.Contains(player)) // already in the team, Contains uses Equals for SoccerPlayer to test presence
{
throw new ArgumentException("Exception: player " + player.Name + " is already in the team");
}
else
{
// add the plater
if (player.Gender == TeamGender)
{
if (player.Age <= AgeLimit)
{
players.Add(player);
}
else
{
throw new ArgumentException("Exception: player " + player.Name + " is too old for team " + TeamName);
}
}
else
{
throw new ArgumentException("Exception: player " + player.Name + " is " + player.Gender + " while team is " + TeamGender);
}
}
}
}
// indexer property, return a player with specified name
public SoccerPlayer this[String playerName]
{
get
{
SoccerPlayer player = null;
Boolean found = false;
for (int i = 0; i < players.Count; i++)
{
if (String.Compare(players[i].Name, playerName, StringComparison.OrdinalIgnoreCase) == 0) // ignore case in comparison
{
found = true;
player = players[i];
}
}
if (found)
{
return(player);
}
else
{
throw new ArgumentException("Exception: Player " + playerName + " is not in the soccer team " + TeamName);
}
}
}
// custom equality comparison for .Equals, used by Contains() on List<>
public override bool Equals(Object obj)
{
SoccerPlayer player = obj as SoccerPlayer;
if (player == null)
{
return(false);
}
// must match all 4 attributes to be equal
if ((player.Name == this.Name) && (player.Age == this.Age) && (player.Gender == this.Gender) && (player.Position == this.Position))
{
return(true);
}
else
{
return(false);
}
}
