OOP2

	private String name;

	private int ID;

	private int studyPoints;

	private boolean mandatory;

	private int semester;

	private int year;

	private int[] requiredCredits;

	public Course(String name, int ID, int studyPoints, boolean mandatory, int semester, int year, int[] requiredCredits) {

		this.name = name;

		this.ID = ID;

		this.studyPoints = studyPoints;

		this.mandatory = mandatory;

		this.semester = semester;

		this.year = year;

		this.requiredCredits = requiredCredits;

	}

	public void setName(String name) {

		this.name = name;

	}

	public String getName() {

		return name;

	}

	public void setID(int ID) {

		this.ID = ID;

	}

	public int getID() {

		return ID;

	}

	public void setStudyPoints(int studyPoints) {

		this.studyPoints = studyPoints;

	}

	public int getStudyPoints() {

		return studyPoints;

	}

	public void setMandatory(boolean mandatory) {

		this.mandatory = mandatory;

	}

	public boolean getMandatory() {

		return mandatory;

	}

	public void setSemester(int semester) {

		this.semester = semester;

	}

	public int getSemester() {

		return semester;

	}

	public void setYear(int year) {

		this.year = year;

	}

	public int getYear() {

		return year;

	}

}

	private List<String> data;

	public CourseFactory(List<String> data) {

		this.data = data;

	}

	private CourseItem detectDataType(String line) {

		Map<String, CourseItem> dataTypes = new HashMap();

		dataTypes.put("ID", CourseItem.ID);

		dataTypes.put("SP", CourseItem.STUDY_POINTS);

		dataTypes.put("Type", CourseItem.MANDATORY);

		dataTypes.put("Jaar", CourseItem.YEAR);

		dataTypes.put("Semester", CourseItem.SEMESTER);

		dataTypes.put("Vereiste", CourseItem.REQUIRED);

		dataTypes.put("", CourseItem.DELIMITER);

		String dataType = line.split(" ")[0]; // bv. "ID = 43" --> "ID"

		if(!dataTypes.containsKey(dataType)) {

			return CourseItem.TITLE;

		}

		else {

			return dataTypes.get(dataType);

		}

	}

	public Course[] generateCourses() {

		int coursesCount = 1;

		for(String line: this.getData()) {

			if(line.equals("")) { // An empty line denotes the end of a course

				coursesCount++;

			}

		}

		Course[] courses = new Course[coursesCount];

		Iterator<String> courseIterator = this.getData().iterator();

		int courseIndex = 0;

		while(courseIterator.hasNext()) {

			String title = "";

			int ID = -1;

			int SP = -1;

			boolean mandatory = false;

			int year = -1;

			int semester = -1;

			int[] requiredCredits;

			String line = courseIterator.next();

			CourseItem lineType = this.detectDataType(line);

			switch(lineType) {

				case CourseItem.DELIMITER:

					Course newCourse = new Course(

							title,

							ID,

							SP,

							mandatory,

							year,

							semester,

							requiredCredits);

					courses[courseIndex] = newCourse;

					courseIndex++;

				break;

				case CourseItem.ID:

					ID = Integer.parseInt(line.split(" ")[2]);

				break;

				case CourseItem.STUDY_POINTS:

					SP = Integer.parseInt(line.split(" ")[2]);

				break;

				case CourseItem.YEAR:

					year = Integer.parseInt(line.split(" ")[2]);

				break;

				case CourseItem.SEMESTER:

					semester = Integer.parseInt(line.split(" ")[2]);

				break;

				case CourseItem.MANDATORY:

					if(line.split(" ")[2].equals("verplicht")) {

						mandatory = true;

					}

				break;

				case CourseItem.TITLE:

					title = line;

				break;

				case CourseItem.REQUIRED:

					for(String lineSnippet: line.split(" ")) {

						try {

							int[] newRequiredCourses = new int[requiredCredits.length + 1];

							for(int i=0; i<requiredCredits.length; i++) {

								newRequiredCourses[i] = requiredCredits[i];

							}

							newRequiredCourses[newRequiredCourses.length-1] = Integer.parseInt(lineSnippet);

							requiredCredits = newRequiredCourses;

						}

						catch(NumberFormatException e) {

							// This is when it's not an integer. safe to ignore.

						}

					}

				break;

			}

			courseIndex++;

		}

	public void setData(List<String> data) {

		this.data = data;

	}

	public List<String> getData() {

		return data;

	}

}

	TITLE,

	ID,

	STUDY_POINTS,

	MANDATORY,

	YEAR,

	SEMESTER,

	REQUIRED,

	DELIMITER

}

public class Main {

		JPanel panel = new JPanel();

		JFrame frame = new JFrame("Hello world!");

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		JLabel lblHelloWorld = new JLabel("Hello world... :D");

		frame.getContentPane().add(lblHelloWorld); // So you use a get() in order to set() data? #JavaWTF

		frame.pack();

		frame.setVisible(true);

	}

 * Window.java - Module to create a new window with JSugar.

 * Copyright © 2016 Maarten "Vngngdn" Vangeneugden

 * 

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>.

 */

/*

 * TODO list:

 * - JSlider (It's the same as the JSpinner, only longer. So an extra.)

 * - JTable (And a JScrollBar to accompany it) (extra, because of JList)

 * - JFileChooser (?)

 * DONE list:

 * - JLabel

 * - JText

 * - JButton

 * - JDialogBoxes (you know, everything dialog related)

 * - JCheckbox

 * - JRadioButton (properly grouping them has been taken care of as well)

 * - JSpinner

 * - JComboBox

 * - JList

 */

import javax.swing.*; // FIXME: Maybe namespacing it to "javax.swing;" is a better idea.

import java.util.NoSuchElementException;

import java.lang.reflect.Method;

import java.io.File;

/**

 * Window class for the program.

 *

 * Window contains the necessary data and methods to present the user with what

 * he's familiar with as being a "window". To make it functional, the developer

 * can make use of a series of methods to add components to said window, remove

 * components, and so on.

 * Currently, Window also contains methods to show dialogs. This will be cleaned

 * in the near future.

 * @author Maarten Vangeneugden

 */

public class Window { // Must be public, in order to generate Javadoc.

	private JPanel panel; // The panel that contains all the components.

	private JFrame frame; // The "window" being presented to the user.

	/**

	 * Constructor of Window.

	 * By creating a new Window instance, this constructor will automatically

	 * start the initialization of the GUI. After doing so, the caller can

	 * start adding components to the window as pleased.

	 * @param title The title to be shown in the window's title bar.

	 */

	public Window(String title) {

		// Setting the UI style to the platform's UI style. Fuck Swing's,

		// really.

		try {

		UIManager.setLookAndFeel(

				UIManager.getSystemLookAndFeelClassName());

		} catch(Exception e) {

			e.printStackTrace();

		}

		if(title == null || title.equals("")) { // If the title was omitted:

			title = "JSugar";

		}

		this.panel = new JPanel();

		// TODO: The current title is "Hello world!" but that will become caller

		// defined soon.

		JFrame frame = new JFrame(title);

		// Makes it so that if the user clicks the X in the titlebar, the window

		// closes:

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		//frame.getContentPane().add(lblHelloWorld); // So you use a get() in order to set() data? #JavaWTF

		frame.setContentPane(this.panel); // Connecting the component panel to the window.

		// Makes the window fit to the necessary width and height, so it can show all "subcomponents".

		frame.pack(); 	

		frame.setVisible(true); // Makes the window visible to the user.

		this.frame = frame;

	}

	/**

	 * Resizes the window to fit all components.

	 * By calling this method, the window will evaluate the currently visible

	 * components, and resize itself so that all components become properly

	 * visible.

	 */

	private void updateWindow() {

		this.frame.pack();

	}

	/**

	 * A series of tests for method and class handling.

	 * When a caller presents certain methods with data concerning reflection,

	 * the Java classes you need to use for that are quite opaque, and don't

	 * offer much safety in any way.

	 * The solution therefore, is run some validation checks, but these take up

	 * a decent amount of space in terms of LoC.

	 * This method takes care of all that. Call this function whenever data

	 * needs to be validated.

	 * @param methodName The name of the method, as it is declared in object.

	 * @param object The class instance in where this method will be called.

	 * @return The method that could be derived from the supplied data, or null

	 * if that wasn't possible.

	 * @throws NullPointerException if either methodName or object are null

	 * pointers.

	 * @throws IllegalArgumentException if methodName is empty, or the method

	 * does not appear to be declared in the given object, or object is not a

	 * class.

	 */

	// All unchecked typecasts are safe, and the use of raw types is taken care

	// of.

	@SuppressWarnings({"unchecked","rawtypes"})

	private Method handleReflectionData(String methodName, Object object) {

		// Null pointer checking:

		if (methodName == null || object == null) {

			throw new NullPointerException("One or more of the given parameters are null pointers.");

		}

		// XXX: Some might say the next line should be in an else{} block. But

		// Scoping rules require that I'd then have to wrap the rest of the

		// method in the same else to use it.

		Class methodClass = object.getClass(); 

		if (methodName.equals("")) {

			throw new IllegalArgumentException("The given methodName was empty.");

		}

		Method method;

		try { // First: Look if there's a method without parameters.

			method = methodClass.getMethod(methodName, null);

		}

		catch (NoSuchMethodException exception) {

			try {

				// It's possible that the method requires an event parameter, so

				// check for that as well:

				Class<?>[] parameters = {java.awt.event.ActionEvent.class};

				method = methodClass.getMethod(methodName, parameters);

			}

			catch (NoSuchMethodException e) {

				throw new IllegalArgumentException("The given method does not appear in the given class. Be aware that the given method mustn't have any parameters, or only 1 parameter, which has to be of type java.awt.event.ActionEvent.");

			}

		}

		// At this stage, the given data has been validated, and we've been able

		// to retrieve the method itself.

		return method;

	}

	/**

	 * Creates a button in the GUI for interaction.

	 * This function offers a convenient way to create a button, that can be

	 * directly interacted with by the user. After creation, the button itself

	 * is returned to the caller, if he wishes to do something else with it.

	 * @param text The text that will be displayed in the button.

	 * @param action The action that will be returned to the action listener.

	 * @param methodName The name of the method that will be called when an

	 * action is triggered.

	 * @param triggerObject The object instance that contains the given method.

	 * This may only be a null pointer if triggerMethod is not an instance

	 * method.

	 * performed. This method may accept an ActionEvent parameter as its only

	 * parameter, or no parameters at all.

	 * @throws NullPointerException if triggerMethod is a null pointer, or

	 * the empty String was given.

	 * @throws IllegalArgumentException if triggerMethod has more than 1

	 * parameter, or the 1 required parameter is not of type ActionEvent.

	 * @return The button that was created.

	 * @see java.awt.event.ActionEvent

	 * @see java.lang.reflect.Method#invoke

	 */

	public JButton createButton(String text, String action, String methodName, Object triggerObject) {

		Method triggerMethod = this.handleReflectionData(methodName, triggerObject);

		// For starters, we first assert that the given parameters are valid:

		if (text == null) {

			text = "";

		}

		if (action == null) {

			action = "";

		}

		// When the method gets here, everything's been validated correctly.

		JButton button = new JButton(text);

		button.setActionCommand(action);

		button.addActionListener(

				new java.awt.event.ActionListener() {

					public void actionPerformed(java.awt.event.ActionEvent event) {

						try {

							triggerMethod.setAccessible(true);

							if (triggerMethod.getParameterTypes().length == 0) {

								// FIXME: Next line throws a warning?

								triggerMethod.invoke(triggerObject, null);

							}

							else {

								triggerMethod.invoke(triggerObject, new Object[]{event});

							}

						}

						catch (Exception useless) {

							/*

							 * XXX: Some info on why I don't just throw said

							 * Exception to the caller:

							 * Java has this awful language constraint, which

							 * forces every damn exception that isn't a subclass

							 * of RuntimeException, to be declared in the method

							 * declaration. This tends to infect all underlying

							 * methods as well, and all that for reasons I can't

							 * comprehend. In order to keep JSugar a simple and

							 * clean library, I'll rather just handle it here,

							 * and throw a RuntimeException with appropriate

							 * details.

							 */

							throw new IllegalArgumentException("triggerMethod is not accessible from this context.");

						}

					}

				});

		this.addComponent(button);

		return button;

	}

	/**

	 * Ask the user for input through a dialog box.

	 * This method presents the user with an input field, that can accept

	 * textual input. The method will return the given input after the user's

	 * clicked a button to send.

	 * @param text The text/question to be asked to the user.

	 * @return A String, equal to what the user entered.

	 * @throws NullPointerException if text is a null pointer.

	 */

	public String inputDialog(String text) {

		if (text == null) {

			throw new NullPointerException("The given text/question was a null pointer.");

		}

		return JOptionPane.showInputDialog(text);

	}

	/**

	 * Give the user a dialog box.

	 * This method can be used to provide a simple dialog to the user.

	 * This will show the user the given question, after which a boolean value

	 * is returned, holding the choice.

	 * @param text The text/question to be asked to the user.

	 * @return True if the user confirms, False if he denies.

	 * @throws NullPointerException if text is a null pointer.

	 */

	public boolean confirmDialog(String text) {

		if (text == null) {

			throw new NullPointerException("The given text/question was a null pointer.");

		}

		final int ACCEPTED = 0;

		//final int DENIED = 1; // Not used in the current context.

		int result = this.choiceDialog(text, new String[]{"Confirm", "Deny"});

		if (result == ACCEPTED) {

			return true;

		}

		else {

			return false;

		}

	}

	/**

	 * Give the user a choice dialog box.

	 * This method gives the user a simple dialog with predefined choices.

	 * These choices are to be provided by the caller in a simple array.

	 *

	 * Tip: This method works extremely well with arbitrary created choices.

	 * That is: if the outcome of the dialog is trivial (e.g. Only 1 choice),

	 * then that value is immediately returned.

	 * @param text The text/question to be asked to the user.

	 * @param choices An array of Strings, containing the choices the user can

	 * pick.

	 * @return The index value of the picked choice, or -1 if no choices were

	 * given.

	 * @throws NullPointerException if text is a null pointer.

	 */

	public int choiceDialog(String text, String[] choices) {

		if (text == null) {

			throw new NullPointerException("The given text/question was a null pointer.");

		}

		// First: handling the trivial cases:

		if (choices.length == 0) {

			return -1;

		}

		else if (choices.length == 1) {

			return 0;

		}

		int answer = JOptionPane.CLOSED_OPTION;

		// The dialog needs to be shown again until the user has made a possible

		// choice, i.e. Chickening out using the close button is not possible

		// (Because that returns CLOSED_OPTION).

		while (answer == JOptionPane.CLOSED_OPTION) {

				JOptionPane.showOptionDialog(

					null, // The parent component. May become the panel?

					text, // The text/question to describe the goal

					"Dialog", // The text in the title bar

					JOptionPane.DEFAULT_OPTION, // The kind of available options

					JOptionPane.QUESTION_MESSAGE, // The type of message

					null, // The icon to show

					choices, // The possible choices

					choices[0] // The standard choice

					);

		}

		return answer;

	}

	/**

	 * Creates a label in the GUI for interaction.

	 * This function offers a convenient way to create a label, that can be

	 * directly interacted with by the user. After creation, the label itself

	 * is returned to the caller, if he wishes to do something else with it.

	 * @param text The text that will be displayed in the label.

	 * @return The label that was created.

	 */

	public JLabel createLabel(String text) {

		JLabel label = new JLabel(text);

		this.addComponent(label);

		return label;

	}

	/**

	 * Adds a checkbox to the window.

	 * By providing a String, you can use this method to easily

	 * create a checkbox, and add it to the window. 

	 * @param text The text to put next to the checkbox.

	 * @return The checkbox that was created and added to the GUI.

	 */

	public JCheckBox createCheckbox(String text) {

		JCheckBox checkbox = new JCheckBox(text);

		this.addComponent(checkbox);

		return checkbox;

	}

	/**

	 * Adds radio buttons to the window.

	 * Given a list of Strings, this method will create the same amount of radio

	 * buttons.

	 *

	 * The radio buttons will silently be grouped in a ButtonGroup object,

	 * making them automatically disable each other, so only 1 radio button can

	 * be enabled. This ButtonGroup is immutable.

	 *

	 * If you need a mutable ButtonGroup, create your own, and use the 

	 * {@link #addComponent} method to add the radio buttons manually.

	 * @param text An array of Strings. The length of the array will determine

	 * the amount of radio buttons that will be created.

	 * @return An array of radio buttons, in the same order as text.

	 */

	public JRadioButton[] createRadioButtons(String text[]) {

		JRadioButton[] radioButtons = new JRadioButton[text.length];

		ButtonGroup buttonGroup = new ButtonGroup();

		for (int i=0; i<radioButtons.length; i++) {

			radioButtons[i].setText(text[i]);

			buttonGroup.add(radioButtons[i]);

			this.addComponent(radioButtons[i]);

		}

		assert radioButtons.length == buttonGroup.getButtonCount() : "The amount of radio buttons ("+ radioButtons.length +") differs from the amount of buttons in buttonGroup ("+ buttonGroup.getButtonCount() +").";

		return radioButtons;

	}

	/**

	 * Adds a number spinner component to the GUI.

	 * This method allows the caller to create a so-called "spinner component"

	 * to the window. This spinner is an input box, in which only integers can

	 * be put.

	 *

	 * The caller can set a range, a start value, and a step size.

	 *

	 * The spinner created with this method may modify itself based on the

	 * parameters.

	 * For example: If the minimum and maximum value are equal, the spinner will

	 * be disabled.

	 *

	 * @param minimum The minimum value that can be selected.

	 * @param maximum The maximum value that can be selected.

	 * @param start The value that will initially be shown in the component.

	 * @param stepSize The step size when the user increases/decreases the

	 * value.

	 * @throws IllegalArgumentException if minimum is larger than maximum, 

	 * start is not in the range of the selectable values, or stepsize is not a

	 * natural number.

	 * @return The JSpinner that was added to the window.

	 */

	public JSpinner createSpinner(int minimum, int maximum, int start, int stepSize) {

		// As usual, we begin with checking the contract:

		if(minimum > maximum) {

			throw new IllegalArgumentException("The minimum value ("+ minimum +") was larger than the maximum value ("+ maximum +")");

		}

		// The "start ∉ [minimum, maximum]" is done by the SpinnerNumberModel

		// constructor, which will be constructed later.

		if(stepSize <= 0) { // stepSize ∉ ℕ¹ (In Belgium: ℕ₀)

			throw new IllegalArgumentException("The stepSize ("+ stepSize +") is not a natural number (excluding 0).");

		}

		// If the contract is valid, we can begin:

		/*

		 * I'd like to interject here, because this is a nice example of why

		 * JSugar was a good idea:

		 * If you want a spinner, you'll typically want an integer spinner. But

		 * in Swing, when you create a JSpinner, it creates a JSpinner, with a

		 * predefined 'SpinnerNumberModel' attached to it.

		 * It's this model you then have to extract from the created spinner, on

		 * which you need to apply the configuration.

		 * What you actually have to do, is create a SpinnerNumberModel

		 * yourself, put your settings on that, and then, create a JSpinner to

		 * which you give that SpinnerNumberModel.

		 * In essence: The entire Java framework is shit.

		 */

		SpinnerNumberModel spinnerSettings = new SpinnerNumberModel(

				start,

				minimum,

				maximum,

				stepSize

				);

		JSpinner spinner = new JSpinner(spinnerSettings);

		if(minimum == maximum) { // Trivial value is set already, --> disable.

			spinner.setEnabled(false);

		}

		this.addComponent(spinner);

		return spinner;

	}

	/**

	 * Adds a number spinner component to the GUI.

	 * This method allows the caller to create a so-called "spinner component"

	 * to the window. This spinner is an input box, in which only integers can

	 * be put.

	 * 

	 * Tip: This method is a convenience method, and works extremely well with

	 * arbitrary data.

	 * For example: The start value is automatically set to the minimal possible

	 * value, and the step size defaults to 1.

	 * If the minimum and maximum are equal, the component will be disabled, and

	 * thus, be locked on the only (trivially) possible value.

	 * If minimum is larger than maximum, the method will notify you of this,

	 * but also swap the values. So you can rest assured that the spinner will

	 * handle errors, but also, inform you about it.

	 * @param minimum The minimum value that can be selected.

	 * @param maximum The maximum value that can be selected.

	 * @return The JSpinner component that was added to the window.

	 */

	public JSpinner createSpinner(int minimum, int maximum) {

		// The disabling of equal values is done in the full createSpinner(), so

		// this is merely switching values if they need to be swapped.