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The Waikato Environment for Knowledge Analysis (WEKA), a machine learning workbench. This version represents the developer version, the "bleeding edge" of development, you could say. New functionality gets added to this version.
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/*
 *   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 .
 */

/*
 *    WorkbenchApp
 *    Copyright (C) 2016 University of Waikato, Hamilton, New Zealand
 *
 */

package weka.gui;

import weka.core.Capabilities;
import weka.core.Defaults;
import weka.core.Environment;
import weka.core.Memory;
import weka.core.Settings;
import weka.core.WekaPackageManager;
import weka.core.converters.AbstractFileLoader;
import weka.core.converters.ConverterUtils;
import weka.gui.explorer.Explorer;
import weka.gui.explorer.PreprocessPanel;

import javax.swing.*;
import java.awt.*;
import java.io.File;
import java.io.IOException;
import java.util.List;

/**
 * One app to rule them all, one app to find them, one app to bring them all and
 * with perspectives bind them.
 *
 * @author Mark Hall (mhall{[at]}pentaho{[dot]}com)
 * @version $Revision: $
 */
public class WorkbenchApp extends AbstractGUIApplication {

  private static final long serialVersionUID = -2357486011273897728L;

  /** for monitoring the Memory consumption */
  protected static Memory m_Memory = new Memory(true);

  /**
   * variable for the Workbench class which would be set to null by the memory
   * monitoring thread to free up some memory if we running out of memory
   */
  protected static WorkbenchApp m_workbench;

  /** The main perspective for this application */
  protected PreprocessPanel m_mainPerspective;

  /** Settings for the Workbench */
  protected Settings m_workbenchSettings;

  /**
   * Constructor
   */
  public WorkbenchApp() {
    super(true, new String[0], new String[] {
      weka.gui.knowledgeflow.AttributeSummaryPerspective.class
        .getCanonicalName(),
      weka.gui.knowledgeflow.ScatterPlotMatrixPerspective.class
        .getCanonicalName(),
      weka.gui.knowledgeflow.SQLViewerPerspective.class.getCanonicalName() });
    m_perspectiveManager
      .addSettingsMenuItemToProgramMenu(getApplicationSettings());
    showPerspectivesToolBar();

    List perspectives =
      m_perspectiveManager.getLoadedPerspectives();
    for (Perspective p : perspectives) {
      m_perspectiveManager.setEnablePerspectiveTab(p.getPerspectiveID(),
        p.okToBeActive());
    }
  }

  /**
   * Get the name of this application
   *
   * @return the name of this application
   */
  @Override
  public String getApplicationName() {
    return WorkbenchDefaults.APP_NAME;
  }

  /**
   * Get the ID of this application
   *
   * @return the ID of this application
   */
  @Override
  public String getApplicationID() {
    return WorkbenchDefaults.APP_ID;
  }

  /**
   * Get the main perspective of this application. In this case the Preprocess
   * panel is the main perspective.
   *
   * @return the main perspective of this application
   */
  @Override
  public Perspective getMainPerspective() {
    if (m_mainPerspective == null) {
      m_mainPerspective = new PreprocessPanel();
    }
    return m_mainPerspective;
  }

  /**
   * Called when the user changes settings
   */
  @Override
  public void settingsChanged() {
    GenericObjectEditor.setShowGlobalInfoToolTips(getApplicationSettings()
      .getSetting(WorkbenchDefaults.APP_ID,
        WorkbenchDefaults.SHOW_JTREE_TIP_TEXT_KEY,
        WorkbenchDefaults.SHOW_JTREE_GLOBAL_INFO_TIPS,
        Environment.getSystemWide()));
  }

  /**
   * Notify filter capabilities listeners of changes
   *
   * @param filter the Capabilities object relating to filters
   */
  public void notifyCapabilitiesFilterListeners(Capabilities filter) {
    for (Perspective p : getPerspectiveManager().getVisiblePerspectives()) {
      if (p instanceof Explorer.CapabilitiesFilterChangeListener) {
        ((Explorer.CapabilitiesFilterChangeListener) p)
          .capabilitiesFilterChanged(new Explorer.CapabilitiesFilterChangeEvent(
            this, filter));
      }
    }
  }

  /**
   * Get the default settings for this application
   *
   * @return the default settings for this application
   */
  @Override
  public Defaults getApplicationDefaults() {
    return new WorkbenchDefaults();
  }

  /**
   * Main method.
   *
   * @param args command line arguments for the Workbench
   */
  public static void main(String[] args) {

    WekaPackageManager.loadPackages(false, false, true);
    weka.core.logging.Logger.log(weka.core.logging.Logger.Level.INFO,
      "Logging started");

    try {
      LookAndFeel.setLookAndFeel(WorkbenchDefaults.APP_ID,
        WorkbenchDefaults.APP_ID + ".lookAndFeel", WorkbenchDefaults.LAF);
    } catch (IOException ex) {
      ex.printStackTrace();
    }

    try {
      if (System.getProperty("os.name").contains("Mac")) {
        Settings forLookAndFeelOnly = new Settings("weka", WorkbenchDefaults.APP_ID);
        String laf =
          forLookAndFeelOnly.getSetting(WorkbenchDefaults.APP_ID, WorkbenchDefaults.APP_ID
              + ".lookAndFeel", WorkbenchDefaults.LAF,
            Environment.getSystemWide());

        if (laf != null && laf.length() > 0
          && (laf.contains("Aqua") || laf.contains("platform default"))) {
          System.setProperty("apple.laf.useScreenMenuBar", "true");
        }
      }
      m_workbench = new WorkbenchApp();
      final javax.swing.JFrame jf =
        new javax.swing.JFrame("Weka " + m_workbench.getApplicationName());
      jf.getContentPane().setLayout(new java.awt.BorderLayout());

      Image icon =
        Toolkit.getDefaultToolkit().getImage(
          WorkbenchApp.class.getClassLoader().getResource(
            "weka/gui/weka_icon_new_48.png"));
      jf.setIconImage(icon);

      jf.getContentPane().add(m_workbench, BorderLayout.CENTER);
      jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      jf.pack();
      m_workbench.showMenuBar(jf);
      jf.setSize(1024, 768);
      jf.setVisible(true);

      if (args.length == 1) {
        System.err.println("Loading instances from " + args[0]);
        AbstractFileLoader loader = ConverterUtils.getLoaderForFile(args[0]);
        loader.setFile(new File(args[0]));
        m_workbench.getPerspectiveManager().getMainPerspective()
          .setInstances(loader.getDataSet());
      }

      Thread memMonitor = new Thread() {
        @Override
        public void run() {
          while (true) {
            // try {
            // System.out.println("Before sleeping.");
            // Thread.sleep(10);

            if (m_Memory.isOutOfMemory()) {
              // clean up
              jf.dispose();
              m_workbench = null;
              System.gc();

              // display error
              System.err.println("\ndisplayed message:");
              m_Memory.showOutOfMemory();
              System.err.println("\nexiting");
              System.exit(-1);
            }
          }
        }
      };

      memMonitor.setPriority(Thread.MAX_PRIORITY);
      memMonitor.start();
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}