com.objectwave.persist.gui
Class DeleteTree

java.lang.Object
  |
  +--com.objectwave.persist.gui.DeleteTree

All Implemented Interfaces:

javax.swing.tree.TreeModel

public class DeleteTree

extends java.lang.Object

implements javax.swing.tree.TreeModel

Used to delete elements from the database. This assumes that all collection links are Vectors.

Version:

$Id: DeleteTree.java,v 2.0 2001/06/11 16:00:04 dave_hoag Exp $

Author:

Dave Hoag

Constructor Summary

DeleteTree(Persistence p)

Method Summary

void	addTreeModelListener(javax.swing.event.TreeModelListener l) Adds a listener for the TreeModelEvent posted after the tree changes.
void	delete(javax.swing.tree.TreePath path)
void	deleteCascade(com.objectwave.persist.gui.DeleteTree.TreeNode[] elements, javax.swing.tree.TreePath path)
protected void	fireInsertedEvent(javax.swing.event.TreeModelEvent e)
protected void	fireTreeNodesChanged(javax.swing.event.TreeModelEvent e) e.path() returns the path the parent of the changed node(s).
protected void	fireTreeNodesRemoved(javax.swing.event.TreeModelEvent e)
protected void	fireTreeStructureChanged(javax.swing.event.TreeModelEvent e)
protected void	forceRoot(java.util.Vector v) Force the root to contain the vector of children.
java.lang.Object	getChild(java.lang.Object parent, int index) Returns the child of parent at index index in the parent's child array.
int	getChildCount(java.lang.Object parent) Returns the number of children of parent .
int	getIndexOfChild(java.lang.Object parent, java.lang.Object child) Returns the index of child in parent.
java.util.Enumeration	getKnownClasses()
java.lang.Object	getRoot() Returns the root of the tree.
boolean	isLeaf(java.lang.Object node) Returns true if node is a leaf.
void	removeTreeModelListener(javax.swing.event.TreeModelListener l) Removes a listener previously added with addTreeModelListener() .
void	valueForPathChanged(javax.swing.tree.TreePath path, java.lang.Object newValue) Messaged when the user has altered the value for the item identified by path to newValue .

Methods inherited from class java.lang.Object

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

Constructor Detail

DeleteTree

public DeleteTree(Persistence p)

Parameters:

p -

Method Detail

getChild

public java.lang.Object getChild(java.lang.Object parent,
                                 int index)

Returns the child of parent at index index in the parent's child array. parent must be a node previously obtained from this data source.

Specified by:

getChild in interface javax.swing.tree.TreeModel

Parameters:

parent - a node in the tree, obtained from this data source

index -

Returns:

the child of parent at index index

getChildCount

public int getChildCount(java.lang.Object parent)

Returns the number of children of parent . Returns 0 if the node is a leaf or if it has no children. parent must be a node previously obtained from this data source.

Specified by:

getChildCount in interface javax.swing.tree.TreeModel

Parameters:

parent - a node in the tree, obtained from this data source

Returns:

the number of children of the node parent

getIndexOfChild

public int getIndexOfChild(java.lang.Object parent,
                           java.lang.Object child)

Returns the index of child in parent.

Specified by:

getIndexOfChild in interface javax.swing.tree.TreeModel

Parameters:

parent -

child -

Returns:

The IndexOfChild value

getKnownClasses

public java.util.Enumeration getKnownClasses()

Returns:

The KnownClasses value

getRoot

public java.lang.Object getRoot()

Returns the root of the tree. Returns null only if the tree has no nodes.

Specified by:

getRoot in interface javax.swing.tree.TreeModel

Returns:

the root of the tree

isLeaf

public boolean isLeaf(java.lang.Object node)

Returns true if node is a leaf. It is possible for this method to return false even if node has no children. A directory in a filesystem, for example, may contain no files; the node representing the directory is not a leaf, but it also has no children.

Specified by:

isLeaf in interface javax.swing.tree.TreeModel

Parameters:

node - a node in the tree, obtained from this data source

Returns:

true if node is a leaf

addTreeModelListener

public void addTreeModelListener(javax.swing.event.TreeModelListener l)

Adds a listener for the TreeModelEvent posted after the tree changes.

Specified by:

addTreeModelListener in interface javax.swing.tree.TreeModel

Parameters:

l - the listener to add

See Also:

removeTreeModelListener(javax.swing.event.TreeModelListener)

delete

public void delete(javax.swing.tree.TreePath path)

Parameters:

path -

deleteCascade

public void deleteCascade(com.objectwave.persist.gui.DeleteTree.TreeNode[] elements,
                          javax.swing.tree.TreePath path)

Parameters:

elements - The list of Nodes to delete.

path - The initial node that was selected to be deleted.

removeTreeModelListener

public void removeTreeModelListener(javax.swing.event.TreeModelListener l)

Removes a listener previously added with addTreeModelListener() .

Specified by:

removeTreeModelListener in interface javax.swing.tree.TreeModel

Parameters:

l - the listener to remove

See Also:

addTreeModelListener(javax.swing.event.TreeModelListener)

valueForPathChanged

public void valueForPathChanged(javax.swing.tree.TreePath path,
                                java.lang.Object newValue)

Messaged when the user has altered the value for the item identified by path to newValue . If newValue signifies a truly new value the model should post a treeNodesChanged event.

Specified by:

valueForPathChanged in interface javax.swing.tree.TreeModel

Parameters:

path - path to the node that the user has altered.

newValue - the new value from the TreeCellEditor.

fireInsertedEvent

protected void fireInsertedEvent(javax.swing.event.TreeModelEvent e)

Parameters:

e -

fireTreeNodesChanged

protected void fireTreeNodesChanged(javax.swing.event.TreeModelEvent e)

e.path() returns the path the parent of the changed node(s). e.childIndices() returns the index(es) of the changed node(s).

Parameters:

e -

fireTreeNodesRemoved

protected void fireTreeNodesRemoved(javax.swing.event.TreeModelEvent e)

Parameters:

e -

fireTreeStructureChanged

protected void fireTreeStructureChanged(javax.swing.event.TreeModelEvent e)

Parameters:

e -

forceRoot

protected void forceRoot(java.util.Vector v)

Force the root to contain the vector of children. Usefull for queries

Parameters:

v -