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AbstractFactory.java

2004-03-24T16:00:00Z

AbstractFactoryEnhancement.java

2004-03-24T16:00:00Z

package examples.abstractFactory.aspectj;

/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * This file is part of the design patterns project at UBC
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is ca.ubc.cs.spl.patterns.
 *
 * Contributor(s): 
 */

import javax.swing.JLabel; 
import javax.swing.JButton; 

/**
 * Illustrates AspectJ's Open Classes: A default implementation of the
 * two factory methods defined in the <code>AbstractFactory</code> interface
 * is attached to the interface.
 *
 * @author Jan Hannemann
 * @author Gregor Kiczales
 * @version 1.0, 05/13/02
 *
 */
public aspect AbstractFactoryEnhancement {

 /**
 * Represents a default implementation to all Abstract Factories
 * for the <code>createLabel()</code> method. 
 *
 * @return a regular <code>JLabel</code>
 */
 
 	public JLabel AbstractFactory.createLabel() {
		return new JLabel("This Label was created by " +getName());
	}
	
 /**
 * Represents a default implementation to all Abstract Factories
 * for the <code>createButton()</code> method. 
 *
 * @param a label for the new <code>JButton</code>
 * @return a regular <code>JButton</code>
 */
 
 public JButton AbstractFactory.createButton(String label) {
		return new JButton(label);
	}	
}

Display.java

2004-03-24T16:00:00Z

package examples.abstractFactory.java;

/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * This file is part of the design patterns project at UBC
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is ca.ubc.cs.spl.patterns.
 *
 * Contributor(s):   
 */
 
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JLabel; 
import javax.swing.JButton; 
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

/**
 * Sets up and displays a new GUI given a concrete factory.
 */

public class Display extends JFrame  { 
    
    /**
     * Sets up the frame with a label and a button created by the respective
     * concrete factory. Both button and frame receive their appropriate 
     * listeners to close the frame when either the button is clicked or
     * the frame is closing.
     *
     * @param factory the factory to create GUI elements
     */ 

	Display(AbstractFactory factory) {
		super("New GUI"); 
		JLabel label = factory.createLabel(); 
		JButton button = factory.createButton("OK");
		button.addActionListener(new myActionListener(this));
		JPanel panel = new JPanel();
		panel.add(label);
		panel.add(button);
		this.getContentPane().add(panel);
		this.pack();
		this.setVisible(true); 
		this.addWindowListener(new myWindowListener(this));
	}
	
	private class myWindowListener extends WindowAdapter {
		
		Display display = null;
		
		protected myWindowListener(Display display) {
			super();
			this.display = display;   
		}
		
		public void windowClosing(WindowEvent e) {
			display.setVisible(false);
		}
	}
	
	private class myActionListener implements ActionListener {
	    
	    Display display;
	    
	    protected myActionListener(Display display) {
	        super();
	        this.display = display;
	    }
	    
	    public void actionPerformed(ActionEvent e) { 
			display.setVisible(false);
		}
	}
}

FramedFactory.java

2004-03-24T16:00:00Z

package examples.abstractFactory.java;

/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * This file is part of the design patterns project at UBC
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is ca.ubc.cs.spl.patterns.
 *
 * Contributor(s): 
 */
 
import javax.swing.JLabel; 
import javax.swing.border.Border;
import javax.swing.BorderFactory;
import javax.swing.JButton;

/**
 * Implements the <code>Abstract Factory</code> interface to provide 
 * framed Swing GUI components.
 */

public class FramedFactory implements AbstractFactory {

 /**
 * Creates a framed <code>JLabel</code> object. 
 *
 * @return the framed <code>JLabel</code>
 */
 

	public JLabel createLabel() {
		JLabel label = new JLabel("This Label was created by " +getName());
		Border raisedbevel = BorderFactory.createRaisedBevelBorder();
		Border loweredbevel = BorderFactory.createLoweredBevelBorder();
		label.setBorder(BorderFactory.createCompoundBorder(raisedbevel, loweredbevel));
		
		return label;
	} 
	
 /**
 * Creates framed <code>JButton</code> objects. 
 *
 * @param the label for the new <code>JButton</code>
 * @return the framed <code>JButton</code>
 */
 
 public JButton createButton(String label) {
		JButton button = new JButton(label);
		Border raisedbevel = BorderFactory.createRaisedBevelBorder();
		Border loweredbevel = BorderFactory.createLoweredBevelBorder();
		button.setBorder(BorderFactory.createCompoundBorder(raisedbevel, loweredbevel));
		return button;
	}	

 /** 	
 * Returns the name of the factory.
 *
 * @return the name of the factory
 */
 
 	public String getName() {
		return "Framed Factory";
	} 
}

Main.java

2004-03-24T16:00:00Z

package examples.abstractFactory.java;

import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JButton;
import javax.swing.JPanel; 
import javax.swing.ButtonGroup;

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


/**
 * Implements a driver for the Abstract Factory design pattern example.
 * The pattern intent is:
 * <blockquote>
 * Provide an interface for creating families of related or dependent objects
 * without specifying their concrete classes.
 * </blockquote>
 *
 * As an example scenario, our abstract factory interface defines two
 * factory methods <code>createLabel()</code> and <code>createButton()</code>
 * that create related products (Swing GUI elements). 
 *
 * The driver is a swing GUI that allows the user to choose between the two 
 * concrete factories <code>RegularFactory</code> and <code>FramedFactory
 * </code>, and creates a new GUI with elements from the respective factory.
 * 
 * 
 * <code>RegularFactory</code> creates standard Swing GUI elements, while
 * <code>FramedFactory</code> produces elements which are framed.
 *
 * This is the Java implementation. 
 *
 * We decided to implement <code>AbstractFactory</code> as an interace,
 * not an abstract class. This has the following advantages and liabilities:
 * <UL>
 * <LI> Concrete factories do not need to be subclasses of the abstract
 * factory. That way existing classes can be subclassed and just have
 * to implement the interface methods. This can be more flexible if
 * we want an existing class to become a factory (e.g. because we
 * want to make use of its functionality.
 * <LI> By defining the abstract factory as an interface we cannot attach
 * any (default) implementations to its methods, nor is it possible 
 * to include fields (such as the <code>name</code> field in this
 * example.
 * </UL>
 * 
 */

public class Main 
{
 /**
 * one of the alternative concrete factories
 */
 
	private static AbstractFactory factory1 = new RegularFactory();
	
 /**
 * the other of the alternative concrete factories
 */
 
	private static AbstractFactory factory2 = new FramedFactory();

 /**
 * stores the currently selected factory
 */
 
	private static AbstractFactory factory = factory1;
	
	
 /**
 * Creates the initial GUI that allows the user to choose a factory
 * and generate a new GUI with the elements that the respective
 * factory provides.
 *
 * @return a <code>JPanel</code> containing the GUI
 */
 
	private static JPanel createGUI()
	{
		ActionListener radioListener = new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if (e.getActionCommand().equals("factory1")) factory = factory1;
				else factory = factory2;
			}
		};
		
		JPanel panel = new JPanel();
		JRadioButton factoryButton1 = new JRadioButton("use Factory 1"); 
		JRadioButton factoryButton2 = new JRadioButton("use Factory 2");
		factoryButton1.setActionCommand("factory1");
		factoryButton2.setActionCommand("factory2");		
		factoryButton1.addActionListener(radioListener);
		factoryButton2.addActionListener(radioListener);		
		JButton create = new JButton("Create GUI");
		
		ButtonGroup choices = new ButtonGroup();
		
		choices.add(factoryButton1);
		choices.add(factoryButton2);
		
		create.addActionListener( new ActionListener() {
			public void actionPerformed(ActionEvent e) { 
				Display display = new Display(factory);
			}
		});
		
		panel.add(factoryButton1);
		panel.add(factoryButton2);
		panel.add(create);
		
		return panel;
	}

 /**
 * Implements the driver for this design pattern example. It sets up
 * the initial GUI.
 */				
		
	public static void main(String[] args)
	{
		JFrame frame = new JFrame("Abstract Factory Demo");
		frame.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {System.exit(0);}
		}); 
		
		frame.getContentPane().add(createGUI());
		
		frame.pack();
		frame.setVisible(true);
	}
}

RegularFactory.java

2004-03-24T16:00:00Z

files.lst

2004-03-24T16:00:00Z