opensessionaction.java

Java version of ABC/HR comparator v0.5. by schnofler. Runs on Sun JRE 1.5 or later

package abchr.gui;

import abchr.TestProject;
import abchr.ProjectLoader;
import abchr.ParseException;
import abchr.crypto.BlowfishCipher;
import abchr.crypto.Cipher;
import abchr.crypto.Util;
import guiutils.SimpleFileChooser;
import guiutils.SimpleFileFilter;
import guiutils.SwingWorker;
import jlfgr.GraphicsRepository;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.io.*;
import java.util.Arrays;

class OpenSessionAction extends AbstractAction {
	private ProjectFrame frame;
	private static final SimpleFileFilter FILE_FILTER=new SimpleFileFilter(".abc","Session files (*.abc)");
	private final WaitMessageDialog waitDialog;

	public OpenSessionAction(ProjectFrame frame) {
		super("Open ABC/HR Session...",GraphicsRepository.getToolbarIcon("general/Open16.gif"));
		this.putValue(Action.SHORT_DESCRIPTION,"Open a previously saved session");
		this.frame=frame;
		waitDialog=new WaitMessageDialog(frame,"Please wait");
		waitDialog.setText("Loading samples");
	}

	public void actionPerformed(ActionEvent e) {
		final File f=SimpleFileChooser.openFile(frame,FILE_FILTER);
		if(f!=null) {
			if(!frame.closeProject()){return;}
			final SwingWorker worker=new SwingWorker() {
				public Object construct() {
					DataInputStream in=null;
					ObjectInputStream stream=null;
					try {
						in=new DataInputStream(new BufferedInputStream(new FileInputStream(f)));
						byte[] magic=new byte[8];
						in.read(magic);
						if(!Arrays.equals(magic,SaveSessionAction.MAGIC)) {
							throw new IOException("Wrong file format");
						}
						in.read(magic);
						if(!Arrays.equals(magic,SaveSessionAction.MAGIC)) {
							byte[] key=new byte[16];
							in.read(key);
							int length=in.readInt();
							byte[] buffer=new byte[length];
							in.read(buffer);
							in.close();
							Cipher cipher=new BlowfishCipher(Util.bytesToInts(key));
							buffer=cipher.decrypt(buffer);
							stream=new ObjectInputStream(new ByteArrayInputStream(buffer));
						} else {
							stream=new ObjectInputStream(in);
						}
						TestProject project=(TestProject)stream.readObject();
						frame.load(project);
					} catch(IOException e1) {
						return e1;
					} catch(ClassNotFoundException e1) {
						return e1;
					} finally {
						if(stream!=null){try{stream.close();}catch(IOException e){}}
						if(in!=null){try{in.close();}catch(Exception ex){}}
					}
					return null;
				}

				public void finished() {
					waitDialog.setVisible(false);
				}
			};
			worker.start();
			waitDialog.show();
			Exception ex=(Exception)worker.get();
			if(ex!=null) {
				ex.printStackTrace();
				JOptionPane.showMessageDialog(frame,"Could not open file.\n"+ex.getMessage(),"Error",JOptionPane.ERROR_MESSAGE);
			}
		}
	}
}