praktikum-holons/src/ui/view/AlgoWindow.java

package ui.view;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;
import java.util.Scanner;
import java.util.stream.Collectors;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextPane;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;

import api.Algorithm;
import ui.controller.Control;

//TODO delete old class AlgorithmMenu and change this class to AlgorithmMenu;
public class AlgoWindow extends JFrame{
	private File root;
	private Algorithm actual;
	private Control control;
	private JPanel content = new JPanel();
	AlgoWindow(JFrame parentFrame, Control control){
		this.control = control;
		this.setTitle("Algorithm");
		this.setVisible(true);
		this.setContentPane(content);
		this.setIconImage(Util.loadImage("/Images/Holeg.png", 30, 30));
		initMenuBar();
		initDefaultContentPanel();
		this.pack();
		this.setLocationRelativeTo(parentFrame);
	}
	private void initMenuBar() {
		JMenuBar menuBar = new JMenuBar();
		JMenu menuSelect = new JMenu("File");
		JMenuItem menuItemFolder= new JMenuItem("Open Folder..");
		
		
		JMenuItem menuItemAlgorithm= new JMenuItem("Open .java-File..");
		menuItemAlgorithm.addActionListener(actionEvent -> {
			System.out.println("Test");
			JFileChooser fileChooser = new JFileChooser();
			fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
			fileChooser.setAcceptAllFileFilterUsed(false);
			int result = fileChooser.showOpenDialog(this);
			if(result == JFileChooser.APPROVE_OPTION) {
				//Found a file
				File founded = fileChooser.getSelectedFile();
				//Get Class name:
				String name = founded.getName().substring(0, founded.getName().lastIndexOf("."));
				//get Package name
				String packageName = "";
				Scanner in = null;
				try {
					in = new Scanner(founded);
				} catch (FileNotFoundException e) {
					System.out.println("File not Found");
				}
				while(in.hasNext()) {
					String line = in.nextLine().trim();
					if(line.startsWith("package")) {
						packageName = line.substring(8, line.length()-1);
						break;
					}
				}
				//GetPathName
				String path =  founded.getParentFile().isDirectory() ? founded.getParentFile().getAbsolutePath() : "";
				File folder = founded.getParentFile();
				System.out.println(founded.getName() + ", Name:" + name + ", Package:" + packageName + ", Path:" + path);
				// Compile source file.
				JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
				if (ToolProvider.getSystemJavaCompiler() == null) {
					System.out.println("MissingCompiler");
				}else {
					compiler.run(null, null, null, founded.getAbsolutePath());					
				}
				try {
				URLClassLoader classLoader = URLClassLoader.newInstance(new URL[] { folder.toURI().toURL() });
				Class<?> cls = Class.forName(packageName.isEmpty()?name:packageName + "." +name, true, classLoader);
				Object object = cls.newInstance();
				if(!(object instanceof Algorithm)) {
					System.out.println("Class does not implement CpsAlgorithm!");
				}else {
					actual = (Algorithm)object;
					actual.setController(control);
					this.setContentPane(actual.getAlgorithmPanel());
					this.pack();
				}
				} catch (MalformedURLException e) {
					System.out.println("URLClassLoader error");
					e.printStackTrace();
				} catch (ClassNotFoundException e) {
					System.out.println("ClassNotFound error" + e.getMessage());
				} catch (InstantiationException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IllegalAccessException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}else {
				//Not
			}
				
			
		});
		menuSelect.add(menuItemAlgorithm);
		menuItemFolder.addActionListener(actionEvent->openFolder(menuSelect));
		menuSelect.add(menuItemFolder);
		menuSelect.addSeparator();
		JMenu menuHelp = new JMenu("Help");
		menuBar.add(menuSelect);
		menuBar.add(menuHelp);
		this.setJMenuBar(menuBar);
	}
	private void initDefaultContentPanel() {
		content.setLayout(new BorderLayout());
		JTextPane textPane = new JTextPane();
		SimpleAttributeSet attribs = new SimpleAttributeSet();  
		StyleConstants.setAlignment(attribs , StyleConstants.ALIGN_JUSTIFIED);
		textPane.setParagraphAttributes(attribs, true);
		textPane.setText("No algorithm is loaded."
				+"\n OPTION[1]:"
				+"\n•  Select '.java'-file via the file browser. (File\u2192Open .jave-File..)"
				+"\n"
				+"\n OPTION[2]: CURRENTLY NOT WORKING"
				+"\n• First select the folder where the algorithm '.java'-file is located. (File\u2192Open Folder..)"
				+"\n• Second load the algorithm. (File\u2192'YourAlgo')");
		textPane.setFont(new Font("Serif", Font.PLAIN, 16));
		
		
		content.add(textPane, BorderLayout.CENTER);
		//content.add(new JButton("Run"),BorderLayout.PAGE_END );
		content.setPreferredSize(new Dimension(500, 500));
	}
	
	private void openFolder(JMenu menuSelect) {
		System.out.println("OpenFolder");
		JFileChooser fileChooser = new JFileChooser();
		fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
		fileChooser.setAcceptAllFileFilterUsed(false);
		int result = fileChooser.showOpenDialog(this);
		if(result == JFileChooser.APPROVE_OPTION) {
			System.out.println("Richtig" + menuSelect.getItemCount());
			System.out.println(fileChooser.getSelectedFile().getAbsolutePath());
			root = fileChooser.getSelectedFile();
			File[] files = fileChooser.getSelectedFile().listFiles(file -> file.getName().endsWith(".java"));
			
			//Remove all Index from old Folder
			for(int i= menuSelect.getItemCount()-1; i> 2; i--) {
				menuSelect.remove(i);
			}
			for(File file: files) {
				menuSelect.add(new JMenuItem(file.getName().substring(0, file.getName().lastIndexOf("."))));
			}
			//System.out.println(Arrays.asList(files).stream().map(Object::toString).collect(Collectors.joining(", ")));
		}else {
			System.out.println("Falsch");
		}
			
		//
	}
}