// This method override the parent's method. It first check if the Extra's Description property is equal to Breakfast and then set the appropriate cost.
public override void ProcessExtra(Extra extra)
{
if (extra.Description == "Breakfast")
{
extra.Cost = 5;
}
else if (extraType != null)
{
extraType.ProcessExtra(extra);
}
}
// This method override the parent's method. It first check if the Extra's Description property is equal to No Extra and then set the appropriate cost.
public override void ProcessExtra(Extra extra)
{
if (extra.Description == "No Extra")
{
extra.Cost = 0;
}
else if (extraType != null)
{
extraType.ProcessExtra(extra);
}
}
// This method override the parent's method. It first check if the Extra's Description property is equal to Evening Meal and then set the appropriate cost.
public override void ProcessExtra(Extra extra)
{
if (extra.Description == "Evening Meal")
{
extra.Cost = 10;
}
else if (extraType != null)
{
extraType.ProcessExtra(extra);
}
}
// This abstract method will be override by the child Concrete Handlers to process the Extra object. public abstract void ProcessExtra(Extra extra);
// This method add to the _extraDict dictionary the Extra's Description property as a key and a Extra object as a value.
public void addExtra(Extra extra)
{
_extraDict.Add(extra.Description, extra);
}