Package nz.co.gregs.dbvolution.query

Class TreeNode<T extends DBRow>

java.lang.Object

nz.co.gregs.dbvolution.query.TreeNode<T>

Type Parameters:

T - The DBRow class

public class TreeNode<T extends DBRow>
extends Object

Encapsulates a DBRow class for use in DBRecursiveQuery tree or path.

Use getData() to retrieve the DBRow contain in the node, getParent() to move up the hierarchy, and getChildren() to move down it.

Author:

Gregory Graham

Constructor Summary

Constructors

Constructor	Description
TreeNode(T data)	Create a new node for the DBRow
TreeNode(T data, TreeNode<T> parent)	Create a new node the contains the specified DBRow as the data, and the specified TreeNode as the parent of the node.

Method Summary

Modifier and Type	Method	Description
void	addChild(TreeNode<T> child)	Append the supplied DBRow to the list of children for this node.
void	addChild(T childData)	Append the supplied DBRow to the list of children for this node.
List<TreeNode<T>>	getChildren()	Returns a list of all known children of this node, that is all database rows returned by the recursive query that referenced this row.
T	getData()	Retrieves the DBRow within this node.
TreeNode<T>	getParent()	Retrieves the node that is the parent of this node.
boolean	isLeaf()	Indicates whether or not this node is a leaf node, that is it has no known children.
boolean	isRoot()	Indicates whether or not this node is a root node, that is it has no known parent.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeNode

public TreeNode(T data)

Create a new node for the DBRow

Parameters:

data - the data to store in the node

TreeNode

public TreeNode(T data,
                TreeNode<T> parent)

Create a new node the contains the specified DBRow as the data, and the specified TreeNode as the parent of the node.

Parameters:

data - the data to store in the node

parent - the parent node of the data

Method Detail

getChildren

public List<TreeNode<T>> getChildren()

Returns a list of all known children of this node, that is all database rows returned by the recursive query that referenced this row.

Returns:

a list of TreeNodes

addChild

public void addChild(T childData)

Append the supplied DBRow to the list of children for this node.

Also adds this node as the parent of the supplied node.

Parameters:

childData - the data to add as a child of this node

addChild

public void addChild(TreeNode<T> child)

Append the supplied DBRow to the list of children for this node.

Also adds this node as the parent of the supplied node.

Parameters:

child - the node to add as a child of this node

getData

public T getData()

Retrieves the DBRow within this node.

Returns:

a DBRow

isRoot

public boolean isRoot()

Indicates whether or not this node is a root node, that is it has no known parent.

Returns:

TRUE if this node is the top of a hierarchy.

isLeaf

public boolean isLeaf()

Indicates whether or not this node is a leaf node, that is it has no known children.

Returns:

TRUE if this node is the bottom of a hierarchy.

getParent

public TreeNode<T> getParent()

Retrieves the node that is the parent of this node.

Use isRoot() to determine if the root has been reached.

Returns:

the TreeNode immediately above this node in the hierarchy

toString

public String toString()

Overrides:

toString in class Object