Settings.java

/*
Mjdj MIDI Morph - an extensible MIDI processor and translator.
Copyright (C) 2010 Confusionists, LLC (www.confusionists.com)

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/>. 

You may contact the author at mjdj_midi_morph [at] confusionists.com
*/
package com.confusionists.mjdj.settings;

import java.io.*;
import java.util.Hashtable;

import com.confusionists.mjdj.fileIO.ExternalDirectories;
import com.confusionists.mjdjApi.morph.Morph;
import com.thoughtworks.xstream.XStream;

public class Settings  {

	private static Settings instance = null;
	protected static String FILENAME = "settings.xml";
	public Hashtable<String, Boolean> receivers = new Hashtable<String, Boolean>();
	public Hashtable<String, Boolean> transmitters = new Hashtable<String, Boolean>();
	public Hashtable<String, MorphAdaptor> morphAdaptors = new Hashtable<String, MorphAdaptor>(); 
	public String clockSourceCombo;
	public boolean doNotUseComSunDrivers;
	public boolean lockScreen;
	
	public static Settings getInstance() {
		return getInstance(false, false);
	}
	
	private Settings() {}
	
	public MorphAdaptor getMorphAdaptor(Morph morph) {
		MorphAdaptor retVal = getMorphActive(morph.getName());
		retVal.setMorph(morph); // TODO this will hard to find if there are two morphs with same name, put in protections against this
		return retVal;
	}
	
	private MorphAdaptor getMorphActive(String name) {
		MorphAdaptor retVal = morphAdaptors.get(name);
		if (retVal == null) {
			retVal = new MorphAdaptor();
			morphAdaptors.put(name, retVal);
		}
		return retVal;
	}
	
	private static String getFilename() {
		return ExternalDirectories.getUserDirectory(FILENAME);
	}
	

	public static Settings getInstance(boolean forceReload, boolean forceNew) {
		if (forceNew)
			instance = new Settings();
		else if (forceReload || instance == null) {
			try {
				load();
			} catch (FileNotFoundException fe) {
				System.out.println("Settings probably not found in file " + getFilename());
				instance = new Settings();
			} catch (Exception e) {
				throw new RuntimeException("Problem loading settings from file " + new File(getFilename()).getAbsolutePath(),e);
				
			}
		}
		return instance;
	}

	public static boolean getBoolean(Hashtable<String, Boolean> settings, String key, boolean defaultSetting) {
		assert (settings != null);
		assert (key != null);
		Boolean obj = settings.get(key);
		if (obj == null)
			return defaultSetting;
		else
			return obj.booleanValue();
	}

	public static boolean getBoolean(Hashtable<String, Boolean> settings, String key) {
		return getBoolean(settings, key, false);
	}

	
	public static void load() throws FileNotFoundException  {
		// Create input streams.
			FileInputStream fis = new FileInputStream(getFilename());
			XStream xstream = new XStream();
			instance = (Settings) xstream.fromXML(fis);
			System.out.println("Settings reloaded sucessfully from " + new File(getFilename()).getAbsolutePath());
			try {
				fis.close();
			} catch (IOException e) {
				e.printStackTrace(); // What does it mean if you cannot close the file? No idea... 
			}
	}

	public void save() throws IOException {
		// Create output stream.
		FileOutputStream fos = new FileOutputStream(getFilename());
		// Create XML encoder.
		XStream xstream = new XStream();
		xstream.toXML(this, fos);
		System.out.println("Settings have been saved to " + getFilename());
		fos.close();
	}

	
	

}