public override void Add(Product product)
{
if (Root == null)
{
Root = new StringBinarySearchTreeNode(product, type);;
}
this.Root.InsertNode(product);
if (Root.Balance < -1 || Root.Balance > 1)
{
BinarySearchTreeNode fakeParent = new StringBinarySearchTreeNode(type)
{
Left = Root
};
Balancer.ReBalance(fakeParent, Root);
Root = fakeParent.Left;
}
}
public override bool InsertNode(Product product)
{
switch (type)
{
case "Name":
{
if (String.Compare(product.Name, Products[0].Name, true) == 0)
{
if (Products.Exists(x => x == product))
{
return(false);
}
AddItem(product);
return(true);
}
else if (String.Compare(product.Name, Products[0].Name, true) < 0)
{
if (Left == null)
{
Left = new StringBinarySearchTreeNode(product, type);
if (Right == null)
{
Balance = -1;
}
else
{
Balance = 0;
}
}
else
{
if (Left.InsertNode(product))
{
if (Left.Balance < -1 || Left.Balance > 1)
{
Balancer.ReBalance(this, Left);
}
else
{
Balance--;
}
}
}
}
else
{
if (Right == null)
{
Right = new StringBinarySearchTreeNode(product, type);
if (Left == null)
{
Balance = 1;
}
else
{
Balance = 0;
}
}
else
{
if (Right.InsertNode(product))
{
if (Right.Balance < -1 || Right.Balance > 1)
{
Balancer.ReBalance(this, Right);
}
else
{
Balance++;
}
}
}
}
if (Balance != 0)
{
return(true);
}
}
break;
case "TradeMark":
default:
{
if (String.Compare(product.TradeMark, Products[0].TradeMark, true) == 0)
{
if (Products.Exists(x => x == product))
{
return(false);
}
AddItem(product);
return(true);
}
else if (String.Compare(product.TradeMark, Products[0].TradeMark, true) < 0)
{
if (Left == null)
{
Left = new StringBinarySearchTreeNode(product, type);
if (Right == null)
{
Balance = -1;
}
else
{
Balance = 0;
}
}
else
{
if (Left.InsertNode(product))
{
if (Left.Balance < -1 || Left.Balance > 1)
{
Balancer.ReBalance(this, Left);
}
else
{
Balance--;
}
}
}
}
else
{
if (Right == null)
{
Right = new StringBinarySearchTreeNode(product, type);
if (Left == null)
{
Balance = 1;
}
else
{
Balance = 0;
}
}
else
{
if (Right.InsertNode(product))
{
if (Right.Balance < -1 || Right.Balance > 1)
{
Balancer.ReBalance(this, Right);
}
else
{
Balance++;
}
}
}
}
}
if (Balance != 0)
{
return(true);
}
break;
}
return(false);
}