net.sf.japi.sql
Class DatabaseTreeModel

java.lang.Object
  net.sf.japi.sql.DatabaseTreeModel

All Implemented Interfaces:

TreeModel

public class DatabaseTreeModel
extends Object
implements TreeModel

A TreeModel displaying the catalogs of a database (usually tables and views) as tree.

Author:

Christian Hujer

Nested Class Summary

class

DatabaseTreeModel.CatalogTreeNode A TreeNode reflecting a Database.

Constructor Summary

DatabaseTreeModel()
Create a DatabaseTreeModel.

DatabaseTreeModel(DatabaseMetaData databaseMetaData)
Create a DatabaseTreeModel for a Database.

Method Summary

void	addTreeModelListener(TreeModelListener l) Adds a listener for the TreeModelEvent posted after the tree changes.
Object	getChild(Object parent, int index) Returns the child of parent at index index in the parent's child array.
int	getChildCount(Object parent) Returns the number of children of parent.
DatabaseMetaData	getDatabaseMetaData() Get the databaseMetaData of this model.
int	getIndexOfChild(Object parent, Object child) Returns the index of child in parent.
Object	getRoot() Returns the root of the tree.
boolean	isLeaf(Object node) Returns true if node is a leaf.
void	refresh() Refresh the data of this model from the database.
void	removeTreeModelListener(TreeModelListener l) Removes a listener previously added with addTreeModelListener.
void	setDatabaseMetaData(DatabaseMetaData databaseMetaData) Set the databaseMetaData for this model.
void	valueForPathChanged(TreePath path, 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

DatabaseTreeModel

public DatabaseTreeModel()

Create a DatabaseTreeModel. Thw tree model is not yet connected to databaseMetaData.

DatabaseTreeModel

public DatabaseTreeModel(DatabaseMetaData databaseMetaData)
                  throws SQLException

Create a DatabaseTreeModel for a Database.

Parameters:

databaseMetaData - Database Metadata for this tree model

Throws:

SQLException - in case of database problems

Method Detail

refresh

public void refresh()
             throws SQLException

Refresh the data of this model from the database.

Throws:

SQLException - in case of database problems

setDatabaseMetaData

public void setDatabaseMetaData(DatabaseMetaData databaseMetaData)
                         throws SQLException

Set the databaseMetaData for this model.

Parameters:

databaseMetaData - database meta data for this model

Throws:

SQLException - in case of database problems

getDatabaseMetaData

public DatabaseMetaData getDatabaseMetaData()

Get the databaseMetaData of this model.

Returns:

databaseMetaData of this model

addTreeModelListener

public void addTreeModelListener(TreeModelListener l)

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

Specified by:

addTreeModelListener in interface TreeModel

Parameters:

l - the listener to add

See Also:

TreeModel.removeTreeModelListener(javax.swing.event.TreeModelListener)

getChild

public Object getChild(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. This should not return null if index is a valid index for parent (that is index >= 0 && index < getChildCount(parent)).

Specified by:

getChild in interface TreeModel

Parameters:

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

Returns:

the child of parent at index index

getChildCount

public int getChildCount(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 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(Object parent,
                           Object child)

Returns the index of child in parent. If either parent or child is null, returns -1. If either parent or child don't belong to this tree model, returns -1.

Specified by:

getIndexOfChild in interface TreeModel

Parameters:

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

child - the node we are interested in

Returns:

the index of the child in the parent, or -1 if either child or parent are null or don't belong to this tree model

getRoot

public Object getRoot()

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

Specified by:

getRoot in interface TreeModel

Returns:

the root of the tree

isLeaf

public boolean isLeaf(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 TreeModel

Parameters:

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

Returns:

true if node is a leaf

removeTreeModelListener

public void removeTreeModelListener(TreeModelListener l)

Removes a listener previously added with addTreeModelListener.

Specified by:

removeTreeModelListener in interface TreeModel

Parameters:

l - the listener to remove

See Also:

TreeModel.addTreeModelListener(javax.swing.event.TreeModelListener)

valueForPathChanged

public void valueForPathChanged(TreePath path,
                                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 TreeModel

Parameters:

path - path to the node that the user has altered

newValue - the new value from the TreeCellEditor