WorkspaceService.java

/* 
 * Copyright (C) 2014 GG-Net GmbH - Oliver Günther
 *
 * 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 <http://www.gnu.org/licenses/>.
 */
package eu.ggnet.saft.core;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.swing.JFrame;

import javafx.application.Platform;

/**
 * This is the Workspace Lookup.
 *
 * All relevant information, which are set at runtime in the Client can be discovert through this.
 *
 * @author oliver.guenther
 */
/* Hint: This is implemened via a Singleton pattern, which is known to be not a good solution.
 * But it can be very simply transformed to a Lookup implementation, which is the Ui standard by now.
 * With this knowledge, the singleton is ok for now.
 */
public class WorkspaceService implements Workspace {

    private Window mainFrame;

    private Set<ActionListener> shutdownListeners = new HashSet<>();

    private Map<Class<?>, Object> values = new HashMap<>();

    private boolean shutdown = false;

    @Override
    public Window getMainFrame() {
        return mainFrame;
    }

    @Override
    public void setMainFrame(JFrame mainFrame) {
        this.mainFrame = mainFrame;
    }

    @Override
    public void shutdown() {
        if ( shutdown ) return; // enure no loops.
        shutdown = true;
        for (ActionListener listener : shutdownListeners) {
            listener.actionPerformed(new ActionEvent(this, ActionEvent.ACTION_PERFORMED, "shutdown"));
        }

        for (Window window : Frame.getWindows()) {
            window.setVisible(false);
            window.dispose();
        }
        Platform.exit();
    }

    @Override
    public void addShutdownListener(ActionListener l) {
        shutdownListeners.add(l);
    }

    @Override
    public boolean removeShutdownListener(ActionListener l) {
        return shutdownListeners.remove(l);
    }

    @Override
    public <T> T getValue(Class<T> clazz) {
        return (T)values.get(clazz);
    }

    @Override
    public <T> void setValue(T t) {
        values.put(t.getClass(), t);
    }
}