starting Mastodon with Drag&Drop onto Fiji window

MastodonIoPlugin.java

package cz.ulman.dnd;

import org.scijava.plugin.Plugin;
import org.scijava.io.IOPlugin;
import org.scijava.io.AbstractIOPlugin;
import org.scijava.io.location.FileLocation;
import org.scijava.io.location.Location;
import java.io.IOException;
import java.util.ArrayList;

import mpicbg.spim.data.SpimDataException;
import org.mastodon.mamut.MainWindow;
import org.mastodon.mamut.WindowManager;
import org.mastodon.mamut.project.MamutProjectIO;

@Plugin(type = IOPlugin.class)
public class MastodonIoPlugin extends AbstractIOPlugin<Object> {

	@Override
	public boolean supportsOpen(final Location source) {
		if (!(source instanceof FileLocation)) return false;
		if (!(source.getName().endsWith(".mastodon"))) return false;
		return true;
	}

	@Override
	public Object open(final Location source) throws IOException {
		final FileLocation fsource = source instanceof FileLocation ? (FileLocation)source : null;
		if (fsource == null) return null; //NB: shouldn't happen...

		startMastodon(fsource.getFile().getAbsolutePath());
		return FAKEINPUT;
	}

	//the "innocent" product of the (hypothetical) file reading...
	private static final Object FAKEINPUT = new ArrayList<Object>(0);

	@Override
	public Class<Object> getDataType() {
		return Object.class;
	}

	void startMastodon(final String projectFile) {
		try {
			System.setProperty("apple.laf.useScreenMenuBar", "true");
			final WindowManager windowManager = new WindowManager(getContext());
			windowManager.getProjectManager().open( new MamutProjectIO().load(projectFile) );
			new MainWindow(windowManager).setVisible(true);
		} catch (IOException | SpimDataException e) {
			e.printStackTrace();
		}
	}
}