com.sptci.rwt.webui.tree
Class AbstractNode<S extends MetaData>

java.lang.Object
  echopointng.tree.DefaultMutableTreeNode
      com.sptci.epng.TreeNode<S>
          com.sptci.rwt.webui.tree.AbstractNode<S>

All Implemented Interfaces:

MutableTreeNode, TreeNode, Serializable

Direct Known Subclasses:

CatalogueNode, ContainerNode, DBMSNode, LeafNode, SchemaNode, TableNode, ViewNode

public abstract class AbstractNode<S extends MetaData>
extends com.sptci.epng.TreeNode<S>

An abstract TreeNode that represents MetaData objects.

© Copyright 2007 Sans Pareil Technologies, Inc.

Version:

$Id: AbstractNode.java 4123 2008-05-25 21:49:01Z rakesh $

Author:

Rakesh Vidyadharan 2007-09-28

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class echopointng.tree.DefaultMutableTreeNode

DefaultMutableTreeNode.BreadthFirstEnumeration, DefaultMutableTreeNode.PathBetweenNodesEnumeration, DefaultMutableTreeNode.PostorderEnumeration, DefaultMutableTreeNode.PreorderEnumeration

Field Summary

Fields inherited from class com.sptci.epng.TreeNode

initialised

Fields inherited from class echopointng.tree.DefaultMutableTreeNode

actionCommand, allowsChildren, children, EMPTY_ENUMERATION, parent, userObject

Constructor Summary

protected	AbstractNode() Create a new tree node with no userObject specified.
	AbstractNode(S userObject) Create a new tree node using the specified metadata object.

Method Summary

protected abstract void	createChildren() Create the child nodes for this node.
int	getChildCount() Return the number of child nodes under this node.
boolean	isLeaf() Determine whether this node holds children or not.
protected void	processFatalException(String name, Throwable throwable) Display an error message if fetching meta data fails.
protected void	processFatalException(Throwable throwable) Display an error message if fetching meta data fails.

Methods inherited from class com.sptci.epng.TreeNode

getUserObject, setUserObject

Methods inherited from class echopointng.tree.DefaultMutableTreeNode

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

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractNode

protected AbstractNode()

Create a new tree node with no userObject specified.

AbstractNode

public AbstractNode(S userObject)

Create a new tree node using the specified metadata object. The object represents a object in the database.

Parameters:

userObject - The model object for this node.

Method Detail

getChildCount

public int getChildCount()

Return the number of child nodes under this node. Lazily loaded on first request.

Specified by:

getChildCount in interface TreeNode

Overrides:

getChildCount in class DefaultMutableTreeNode

Returns:

The number of children for this node.

See Also:

createChildren()

isLeaf

public boolean isLeaf()

Determine whether this node holds children or not. Over-ridden to always indicate that there are children.

Specified by:

isLeaf in interface TreeNode

Overrides:

isLeaf in class DefaultMutableTreeNode

Returns:

Returns true if the receiver is a leaf. Always returns false.

createChildren

protected abstract void createChildren()

Create the child nodes for this node.

processFatalException

protected void processFatalException(Throwable throwable)

Display an error message if fetching meta data fails.

Parameters:

throwable - The exception that was raised.

processFatalException

protected void processFatalException(String name,
                                     Throwable throwable)

Display an error message if fetching meta data fails. Over-loaded to replace a $object$ place holder with the specified name.

Parameters:

name - The name of the database object that was being analysed.

throwable - The exception that was raised.