public HeapNode <Tkey, Tvalue> GetHeapTop()
{
Console.WriteLine("Root {0},{1} has been returned as \"TOP\" of HEAP with parent {2},{3}", Root.Data.ToString(), Root.Key.ToString(), (Root.Parent != null ? Root.Parent.Data.ToString() : "NULL"), (Root.Parent != null ? Root.Parent.Key.ToString() : "NULL"));
if (Root != null)
{
var temp = FindLeaf(Root);
var topval = new HeapNode <Tkey, Tvalue>();//Root;
SwapNodes(topval, Root);
SwapNodes(temp, Root);
//Root = temp;
if (temp.Parent != null && temp.Parent.Right != null)//&& temp.Parent.Left.Data.CompareTo(temp.Data) == 0)
{
temp.Parent.Right = null;
}
else if (temp.Parent != null && temp.Parent.Left != null)
{
temp.Parent.Left = null;
}
if (Root == null)
{
Console.WriteLine("NULL.........");
}
ReheapifyMAXDown(Root);
return(topval);
}
return(new HeapNode <Tkey, Tvalue>());
}
public void SwapNodes(HeapNode <Tkey, Tvalue> node1, HeapNode <Tkey, Tvalue> node2)
{
HeapNode <Tkey, Tvalue> temp = new HeapNode <Tkey, Tvalue>();
temp.Key = node1.Key;
temp.Data = node1.Data;
node1.Data = node2.Data;
node1.Key = node2.Key;
node2.Data = temp.Data;
node2.Key = temp.Key;
}
/*public int CompreTo( Tvalue val1,Tvalue val2)
* {
*
* //return root.Data.CompareTo(val);
* }*/
public void InsertNode(Tkey key = default(Tkey), Tvalue val = default(Tvalue))
{
if (Root == null)
{
Root = new HeapNode <Tkey, Tvalue>();
Root.Data = val;
Root.Key = key;
Console.WriteLine("Root {0},{1} has been inserted and parent {2},{3}", Root.Data.ToString(), Root.Key.ToString(), (Root.Parent != null ? Root.Data.ToString() : "NULL"), (Root.Parent != null ? Root.Key.ToString() : "NULL"));
}
else
{
InsertAtEnd(key, val);
}
}
private void ReheapifyMAXUp(HeapNode <Tkey, Tvalue> node)
{
Console.WriteLine("-ReheapifyMAXUp of Node {0},{1} has been started with parent {2},{3}", node.Data.ToString(), node.Key.ToString(), (node.Parent != null ? node.Parent.Data.ToString() : "NULL"), (node.Parent != null ? node.Parent.Key.ToString() : "NULL"));
//Tkey tempkey; Tvalue tempvalue;
if (node.Parent.Data.CompareTo(node.Data) == 0)
{
List <string> lst = new List <string>();
lst.Add(node.Parent.Key.ToString());
lst.Add(node.Key.ToString());
lst.Sort();
if (lst[1] == node.Data.ToString())
{
//tempkey = node.Parent.Key;
//tempvalue = node.Parent.Data;
//temp = node.Parent;
//node.Parent.Data = node.Data;
//node.Parent.Key = tempkey;
//node.Data = tempvalue;
//node.Key = tempkey;
//node.Parent = temp;
SwapNodes(node, node.Parent);
}
}
else
if (node.Parent.Data.CompareTo(node.Data) < 0)
{
/*tempkey = node.Key;
* tempvalue = node.Data;
* node.Data=node.Parent.Data;
* node.Key = node.Parent.Key;
* node.Parent.Data =tempvalue;
* node.Parent.Key = tempkey;*/
SwapNodes(node, node.Parent);
Console.WriteLine("--Swap of Node {0},{1} has been started with parent {2},{3}", node.Data.ToString(), node.Key.ToString(), (node.Parent != null ? node.Parent.Data.ToString() : "NULL"), (node.Parent != null ? node.Parent.Key.ToString() : "NULL"));
}
if (node.Parent != null && node.Parent.Parent != null && node.Parent.Data.CompareTo(node.Parent.Parent.Data) > 0)
{
//
ReheapifyMAXUp(node.Parent);
}
}
private void InsertAtEnd(Tkey key, Tvalue val)
{
HeapNode <Tkey, Tvalue> leaf = FindLeafToInsertAt(Root);
if (leaf.Left == null)
{
leaf.Left = new HeapNode <Tkey, Tvalue>();
leaf.Left.Data = val;
leaf.Left.Key = key;
leaf.Left.Parent = leaf;
Console.WriteLine("Node {0},{1} has been inserted at left of parent {2},{3}", leaf.Left.Data.ToString(), leaf.Left.Key.ToString(), (leaf.Left.Parent != null?leaf.Left.Parent.Data.ToString():"NULL"), (leaf.Left.Parent != null?leaf.Left.Parent.Key.ToString():"NULL"));
if (Type == HeapType.Max)
{
ReheapifyMAXUp(leaf.Left);
}
else
{
ReheapifyMINUp(leaf.Left);
}
}
else if (leaf.Right == null)
{
leaf.Right = new HeapNode <Tkey, Tvalue>();
leaf.Right.Data = val;
leaf.Right.Key = key;
leaf.Right.Parent = leaf;
Console.WriteLine("Node {0},{1} has been inserted at right of parent {2},{3}", leaf.Right.Data.ToString(), leaf.Right.Key.ToString(), (leaf.Right.Parent != null ? leaf.Right.Parent.Data.ToString() : "NULL"), (leaf.Right.Parent != null ? leaf.Right.Parent.Key.ToString() : "NULL"));
if (Type == HeapType.Max)
{
ReheapifyMAXUp(leaf.Right);
}
else
{
ReheapifyMINUp(leaf.Right);
}
}
else
{
throw new Exception("Cannot Create new leaf child...");
}
}
private HeapNode <Tkey, Tvalue> FindLeaf(HeapNode <Tkey, Tvalue> node)
{
HeapNode <Tkey, Tvalue> temp;
if (node != null)
{
Q.Clear();
Q.Enqueue(node);
while (Q.Count > 0)
{
temp = Q.Dequeue();
//Console.Write(" " + temp.Data.ToString() + " ");
if (temp.Left != null)
{
Q.Enqueue(temp.Left);
}
/*else
* {
* return temp;
* }*/
if (temp.Right != null)
{
Q.Enqueue(temp.Right);
}
else if ((temp.Left == null || temp.Right == null) && Q.Count == 0)
{
Q.Clear();
return(temp);
}
}
}
Q.Clear();
return(null);
}
private void ReheapifyMAXDown(HeapNode <Tkey, Tvalue> node)
{//
if (node.Key != null)
{
Console.WriteLine("-ReheapifyMAXDown Node {0},{1} has been inserted at left of parent {2},{3}", node.Data.ToString(), node.Key.ToString(), (node.Parent != null ? node.Parent.Data.ToString() : "NULL"), (node.Parent != null ? node.Parent.Key.ToString() : "NULL"));
}
HeapNode <Tkey, Tvalue> temp;
if ((node.Left != null && node.Right != null) && node.Data.CompareTo(node.Left.Data) > 0 && node.Data.CompareTo(node.Right.Data) > 0)
{
return;
}
else if ((node.Left != null && node.Right != null) && node.Right.Data.CompareTo(node.Left.Data) > 0)
{
SwapNodes(node, node.Right);
ReheapifyMAXDown(node.Right);
}
else if ((node.Left != null && node.Right != null) && node.Right.Data.CompareTo(node.Left.Data) < 0)
{
SwapNodes(node, node.Left);
ReheapifyMAXDown(node.Left);
}
else if ((node.Left != null && node.Right != null) && node.Right.Data.CompareTo(node.Left.Data) == 0)
{
List <string> ls = new List <string>();
ls.Add(node.Left.Key.ToString());
ls.Add(node.Right.Key.ToString());
ls.Sort();
if (ls[0] == node.Left.Key.ToString())
{
SwapNodes(node, node.Left);
ReheapifyMAXDown(node.Left);
}
else
{
SwapNodes(node, node.Right);
ReheapifyMAXDown(node.Right);
}
}
else if (node.Left != null && node.Data.CompareTo(node.Left.Data) < 0)
{
/* temp = node;
* node= node.Left;
* node.Left = temp;*/
SwapNodes(node, node.Left);
ReheapifyMAXDown(node.Left);
}
else if (node.Right != null && node.Data.CompareTo(node.Right.Data) < 0)
{
/*temp = node;
* node = node.Right;
* node.Right = temp;*/
SwapNodes(node, node.Right);
ReheapifyMAXDown(node.Right);
}
}
private void ReheapifyMINUp(HeapNode <Tkey, Tvalue> node)
{
}