com.sptci.echo.tree
Class TreeNode<M>

java.lang.Object
  echopoint.tree.DefaultMutableTreeNode<M>
      com.sptci.echo.tree.TreeNode<M>

All Implemented Interfaces:

MutableTreeNode<M>, TreeNode, Serializable

Direct Known Subclasses:

FileSystemTreeNode

public class TreeNode<M>
extends DefaultMutableTreeNode<M>

A tree node that maintains a initialised flag to enable lazy loading of child nodes.

© Copyright 2009 Sans Pareil Technologies, Inc.

Version:

$Id: TreeNode.java 4856 2009-08-11 15:22:46Z rakesh $

Author:

Rakesh Vidyadharan 2009-06-03

See Also:

Serialized Form

Field Summary

protected boolean

initialised A flag used to indicate that this node is un-initialised.

Fields inherited from class echopoint.tree.DefaultMutableTreeNode

actionCommand, allowsChildren, children, EMPTY_ENUMERATION, parent, userObject

Constructor Summary

TreeNode()
Default constructor.

TreeNode(M model)
Create a new tree node with the specified model object backing it.

TreeNode(M model, boolean allowsChildren)
Create a new node with the specified model and flag indicating whether the node allows children.

Method Summary

boolean

isLeaf() Over-ridden to always return false.

Methods inherited from class echopoint.tree.DefaultMutableTreeNode

add, breadthFirstEnumeration, children, depthFirstEnumeration, getActionCommand, getAllowsChildren, getChildAfter, getChildAt, getChildBefore, getChildCount, getDepth, getFirstChild, getFirstLeaf, getIndex, getLastChild, getLastLeaf, getLeafCount, getLevel, getNextLeaf, getNextNode, getNextSibling, getParent, getPath, getPathToRoot, getPreviousLeaf, getPreviousNode, getPreviousSibling, getRoot, getSharedAncestor, getSiblingCount, getUserObject, getUserObjectPath, insert, isNodeAncestor, isNodeChild, isNodeDescendant, isNodeRelated, isNodeSibling, isRoot, pathFromAncestorEnumeration, postorderEnumeration, preorderEnumeration, remove, remove, removeAllChildren, removeFromParent, setActionCommand, setAllowsChildren, setParent, setUserObject, toString

Methods inherited from class java.lang.Object

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

Field Detail

initialised

protected boolean initialised

A flag used to indicate that this node is un-initialised. Used to lazily load child components. Typically checked in DefaultMutableTreeNode.getChildCount() and set accordingly. Default to false.

Constructor Detail

TreeNode

public TreeNode()

Default constructor. No special actions required.

TreeNode

public TreeNode(M model)

Create a new tree node with the specified model object backing it.

Parameters:

model - The model object backing the node.

TreeNode

public TreeNode(M model,
                boolean allowsChildren)

Create a new node with the specified model and flag indicating whether the node allows children.

Parameters:

model - The model object backing the node.

allowsChildren - A flag indiciating whether the node allows children.

Method Detail

isLeaf

public boolean isLeaf()

Over-ridden to always return false. This enables lazy loading of the children of nodes.

Specified by:

isLeaf in interface TreeNode

Overrides:

isLeaf in class DefaultMutableTreeNode<M>