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///////////////////////////////////////////////////////////////////////////////
// For information as to what this class does, see the Javadoc, below. //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard //
// Scheines, Joseph Ramsey, and Clark Glymour. //
// //
// 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 2 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, write to the Free Software //
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA //
///////////////////////////////////////////////////////////////////////////////
package edu.cmu.tetradapp.app;
import edu.cmu.tetrad.util.JOptionUtils;
import edu.cmu.tetrad.util.TetradLogger;
import edu.cmu.tetrad.util.Version;
import edu.cmu.tetradapp.model.SessionWrapper;
import edu.cmu.tetradapp.model.TetradMetadata;
import edu.cmu.tetradapp.session.Session;
import edu.cmu.tetradapp.util.DesktopController;
import edu.cmu.tetradapp.util.WatchedProcess;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.prefs.Preferences;
/**
* Represents an action to load a session from a file. Extends AbstractAction class.
*/
final class LoadSessionAction extends AbstractAction {
/**
* Constructs a new action to open sessions.
*/
public LoadSessionAction() {
super("Open Session...");
}
/**
* Opens a session file and loads it into Tetrad.
*
* @param e the event to be processed
*/
public void actionPerformed(ActionEvent e) {
// select a file to open using the file chooser
JFileChooser chooser = new JFileChooser();
String sessionSaveLocation =
Preferences.userRoot().get("sessionSaveLocation", "");
for (javax.swing.filechooser.FileFilter filter : chooser.getChoosableFileFilters()) {
chooser.removeChoosableFileFilter(filter);
}
chooser.setCurrentDirectory(new File(sessionSaveLocation));
chooser.addChoosableFileFilter(new TetFileFilter());
chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
int ret1 = chooser.showOpenDialog(JOptionUtils.centeringComp());
if (!(ret1 == JFileChooser.APPROVE_OPTION)) {
return;
}
File file = chooser.getSelectedFile();
if (file == null) {
return;
}
Preferences.userRoot().put("sessionSaveLocation", file.getParent());
Session session = DesktopController.getInstance().getSessionByName(file.getName());
if (session != null) {
if (session.isEmpty()) {
DesktopController.getInstance().closeSessionByName(file.getName());
} else {
int ret = JOptionPane.showConfirmDialog(JOptionUtils.centeringComp(),
"Replace existing session by that name?.", "Confirm", JOptionPane.YES_NO_OPTION);
if (ret == JOptionPane.YES_OPTION) {
DesktopController.getInstance().closeSessionByName(file.getName());
} else {
return;
}
}
}
// The watcher thread is causing a race condition with JFileChooser.showOpenDialog somehow. Placing that
// code outside the thread.
class MyWatchedProcess extends WatchedProcess {
public void watch() {
try {
FileInputStream in = new FileInputStream(file);
DecompressibleInputStream objIn = new DecompressibleInputStream(in);
Object o = objIn.readObject();
TetradMetadata metadata = null;
SessionWrapper sessionWrapper = null;
if (o instanceof TetradMetadata) {
metadata = (TetradMetadata) o;
try {
sessionWrapper = (SessionWrapper) objIn.readObject();
} catch (ClassNotFoundException e1) {
throw e1;
} catch (Exception e2) {
e2.printStackTrace();
TetradLogger.getInstance().log("Exception: " + e2.getMessage());
}
} else if (o instanceof SessionWrapper) {
sessionWrapper = (SessionWrapper) o;
}
in.close();
if (metadata == null) {
throw new NullPointerException("Could not read metadata.");
}
if (sessionWrapper == null) {
Version version = metadata.getVersion();
Date date = metadata.getDate();
SimpleDateFormat df = new SimpleDateFormat("MMM dd, yyyy");
JOptionPane.showMessageDialog(JOptionUtils.centeringComp(),
"Could not load this session file into Tetrad " + Version.currentViewableVersion() + "! \n" +
"The session was saved by Tetrad " + version + " on " + df.format(date));
return;
}
SessionEditorWorkbench graph =
new SessionEditorWorkbench(sessionWrapper);
String name = file.getName();
sessionWrapper.setName(name);
SessionEditor editor = new SessionEditor(name, graph);
DesktopController.getInstance().addSessionEditor(editor);
DesktopController.getInstance().closeEmptySessions();
DesktopController.getInstance().putMetadata(sessionWrapper, metadata);
} catch (FileNotFoundException ex) {
ex.printStackTrace();
JOptionPane.showMessageDialog(JOptionUtils.centeringComp(), "That wasn't a TETRAD session file: " + file);
} catch (Exception ex) {
ex.printStackTrace();
JOptionPane.showMessageDialog(JOptionUtils.centeringComp(), "An error occurred attempting to load the session.");
}
}
}
new MyWatchedProcess();
}
/**
* Represents a decompressible input stream for deserializing objects.
*/
public static class DecompressibleInputStream extends ObjectInputStream {
public DecompressibleInputStream(InputStream in) throws IOException {
super(in);
}
public Class resolveClass(ObjectStreamClass desc) throws ClassNotFoundException {
String remappedClassName = mapToCurrentPackageName(desc.getName());
return Class.forName(remappedClassName);
}
private String mapToCurrentPackageName(String originalClassName) {
// Implement this function to correctly map obsolete class names to their current counterparts
// The following lines are just examples, should be adapted according to the actual class name changes in your codebase
if (originalClassName.contains("tetrad.session"))
return originalClassName.replace("tetrad.session", "tetradapp.session");
// If no special mapping is needed, return the original class name
return originalClassName;
}
}
}
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