org.ecoinformatics.seek.querybuilder

Class DBTableJoin

java.lang.Object

org.ecoinformatics.seek.querybuilder.DBTableJoin

public class DBTableJoin
extends java.lang.Object

This class maintains all the joins for the query. It is a model, a view, and a controller.
Model - A vector of all the join items
View - It is responsible for drawing all the lines representing the joins Controller - When clicks occur it is asked for hit detection as to whether a link was clicked on.

Field Summary

Fields

Modifier and Type	Field and Description
protected DBTableDesktopPane	mDesktopPane
protected java.util.Vector	mJoinItems
protected DSSchemaIFace	mSchema
protected DBTableJoinItem	mSelectedItem

Constructor Summary

Constructors

Constructor and Description
DBTableJoin(DBTableDesktopPane aDeskTopPane) Constructor takes Schema object (interface)

Method Summary

Modifier and Type	Method and Description
void	addJoin(DBSelectTableModelItem aLeft, DBSelectTableModelItem aRight) Add a Join by item
void	addJoin(DBTableField aItem1, DBTableField aItem2) Add a Join
void	clear() Clears all of the join items
java.util.Vector	getJoins() Returns the Vector of Joins
void	paint(java.awt.Graphics g) Implements a paint method for painting all joins
void	refresh() Refreshes the DesktopPane
boolean	removeSelectedLink() Removes a link or "join" between two tables
void	removeTable(int aTableId, java.lang.String aTableName) Removes a tables to and from joins.
void	selectLink(java.awt.event.MouseEvent ev) Uses the mouse event to select or deselect a link

Methods inherited from class java.lang.Object

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

Field Detail

mJoinItems

protected java.util.Vector mJoinItems

mSchema

protected DSSchemaIFace mSchema

mDesktopPane

protected DBTableDesktopPane mDesktopPane

mSelectedItem

protected DBTableJoinItem mSelectedItem

Constructor Detail

DBTableJoin

public DBTableJoin(DBTableDesktopPane aDeskTopPane)

Constructor takes Schema object (interface)

Parameters:

aDeskTopPane - desktop pane that implements DSSchemaIFace

Method Detail

getJoins

public java.util.Vector getJoins()

Returns the Vector of Joins

Returns:

vector

clear

public void clear()

Clears all of the join items

removeTable

public void removeTable(int aTableId,
                        java.lang.String aTableName)

Removes a tables to and from joins. It looks up by id first and then table name

Parameters:

aTableId - the id of the table

aTableName - the name of the table

addJoin

public void addJoin(DBTableField aItem1,
                    DBTableField aItem2)

Add a Join

Parameters:

aItem1 - the left item

aItem2 - the right item

addJoin

public void addJoin(DBSelectTableModelItem aLeft,
                    DBSelectTableModelItem aRight)

Add a Join by item

Parameters:

aLeft - the left part of the link

aRight - the right part of the link

paint

public void paint(java.awt.Graphics g)

Implements a paint method for painting all joins

Parameters:

g - the graphics object

refresh

public void refresh()

Refreshes the DesktopPane

removeSelectedLink

public boolean removeSelectedLink()

Removes a link or "join" between two tables

Returns:

true if link was deleted, false if not

selectLink

public void selectLink(java.awt.event.MouseEvent ev)

Uses the mouse event to select or deselect a link

Parameters:

ev - mouse event