Package com.exasol.util

Class AbstractTreeNode

java.lang.Object

com.exasol.util.AbstractTree

com.exasol.util.AbstractTreeNode

All Implemented Interfaces:

TreeNode

Direct Known Subclasses:

AbstractFunction, BinaryArithmeticExpression

public abstract class AbstractTreeNode
extends AbstractTree

This is an abstract base class for nodes in a tree structure.

Field Summary

Fields inherited from class com.exasol.util.AbstractTree

children, parent

Constructor Summary

Constructors

Constructor	Description
AbstractTreeNode()	Create a new instance of a AbstractTreeNode that serves as root for a tree.

Method Summary

Modifier and Type	Method	Description
void	addChild(TreeNode child)	Add a child node below this node.
TreeNode	getRoot()	Get the root of the tree
void	setParent(TreeNode parent)	Link to a parent node

Methods inherited from class com.exasol.util.AbstractTree

getChild, getChildren, getParent, isChild, isFirstSibling, isRoot, isSibling

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractTreeNode

public AbstractTreeNode()

Create a new instance of a AbstractTreeNode that serves as root for a tree.

Method Detail

setParent

public void setParent(TreeNode parent)

Link to a parent node

Parameters:

parent - the parent to which this node will be linked as a child

Throws:

IllegalArgumentException - if parent is null or parent and child are identical

getRoot

public TreeNode getRoot()

Description copied from interface: TreeNode

Get the root of the tree

Returns:

root node

addChild

public void addChild(TreeNode child)

Description copied from interface: TreeNode

Add a child node below this node. Children are registered in the order in which they are added.

Important: this also automatically creates a link in the opposite direction. All implementations must adhere to this rule.

Parameters:

child - child node