fi.joensuu.cs.tra
Class TreeNode<E>

java.lang.Object
  fi.joensuu.cs.tra.TreeNode<E>

public class TreeNode<E>
extends Object

TreeNode is a building block for basic Trees.

See Also:

Tree

Constructor Summary

TreeNode(E element)
Creates a new TreeNode with the specified element.

Method Summary

int	getBalance() Returns this node's balance.
E	getElement() Returns this node's element.
TreeNode<E>	getLeftChild() Returns this node's leftmost child.
TreeNode<E>	getParent() Returns this node's parent node.
TreeNode<E>	getRightSibling() Returns this node's right sibling.
TreeNode<E>	removeLeftChild() Removes this node's left child.
TreeNode<E>	removeRightSibling() Removes this node's right sibling.
void	setBalance(int balance) Sets this node's balance.
E	setElement(E element) Sets this node's element.
void	setLeftChild(Tree<E> tree) Sets this node's left child to be the root node of the specified Tree.
void	setLeftChild(TreeNode<E> node) Sets this node's left child.
void	setRightSibling(Tree<E> tree) Sets this node's right sibling to be the root node of the specified Tree.
void	setRightSibling(TreeNode<E> node) Sets this node's right sibling.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TreeNode

public TreeNode(E element)

Creates a new TreeNode with the specified element.

Parameters:

element - the element for the TreeNode.

Method Detail

setBalance

public void setBalance(int balance)

Sets this node's balance.

Parameters:

balance - the new balance for this node.

getBalance

public int getBalance()

Returns this node's balance.

Returns:

this node's balance.

getElement

public E getElement()

Returns this node's element.

Returns:

this node's element or null if none.

setElement

public E setElement(E element)

Sets this node's element.

Parameters:

element - new element for this node.

Returns:

the old element or null if none.

Throws:

ElementTypeMismatchException - if the type of element does not match that of this node.

getParent

public TreeNode<E> getParent()

Returns this node's parent node.

Returns:

this node's parent node or null if this node is the root node or not part of a Tree.

getLeftChild

public TreeNode<E> getLeftChild()

Returns this node's leftmost child.

Returns:

this node's leftmost child or null if none exists.

setLeftChild

public void setLeftChild(TreeNode<E> node)

Sets this node's left child.

Parameters:

node - the new left child.

Throws:

NullPointerException - if node is null.

ElementTypeMismatchException - if node's element type does not match that of this node.

setLeftChild

public void setLeftChild(Tree<E> tree)

Sets this node's left child to be the root node of the specified Tree.

Parameters:

tree - the Tree the root node of which is to be this node's left child.

Throws:

NullPointerException - if tree or its root node is null.

ElementTypeMismatchException - if tree's element type does not match that of this node.

removeLeftChild

public TreeNode<E> removeLeftChild()

Removes this node's left child. The old left child's right sibling (if any) will become this node's new left child.

Returns:

the node that used to be this node's left child or null if this node had no left child.

getRightSibling

public TreeNode<E> getRightSibling()

Returns this node's right sibling.

Returns:

this node's right sibling or null if none exists.

setRightSibling

public void setRightSibling(TreeNode<E> node)

Sets this node's right sibling.

Parameters:

node - the new right sibling.

Throws:

NullPointerException - if node is null.

TreeException - if this node is the root node.

setRightSibling

public void setRightSibling(Tree<E> tree)

Sets this node's right sibling to be the root node of the specified Tree.

Parameters:

tree - the Tree the root node of which is to become this node's right sibling.

Throws:

NullPointerException - if tree or its root node is null.

ElementTypeMismatchException - if tree's element type does not match that of this node.

removeRightSibling

public TreeNode<E> removeRightSibling()

Removes this node's right sibling. The old right sibling's right sibling (if any) will become this node's new right sibling.

Returns:

the node that used to be the right sibling or null if this node had no right sibling.