package org.openoffice.accessibility.misc;

import java.io.File;
import java.io.FileReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Properties;


/** Load from and save options into a file.
*/
public class Options
    extends Properties
{
    static public Options Instance ()
    {
        if (saOptions == null)
            saOptions = new Options ();
        return saOptions;
    }

    static public void SetString (String sName, String sValue)
    {
        Instance().setProperty (sName, sValue);
        Instance().Save ();
    }

    static public String GetString (String sName)
    {
        return Instance().getProperty (sName);
    }

    static public void SetBoolean (String sName, boolean bValue)
    {
        Instance().setProperty (sName, Boolean.toString(bValue));
        Instance().Save ();
    }

    static public boolean GetBoolean (String sName)
    {
        return Boolean.valueOf(Instance().getProperty (sName)).booleanValue();
    }

    static public void SetInteger (String sName, int nValue)
    {
        Instance().setProperty (sName, Integer.toString(nValue));
        Instance().Save ();
    }

    static public int GetInteger (String sName, int nDefault)
    {
        String sValue = Instance().getProperty (sName);
        if (sValue == null)
            return nDefault;
        else
            return Integer.parseInt (sValue);
    }

    public void Load (String sBaseName)
    {
        try
        {
            load (new FileInputStream (ProvideFile(sBaseName)));
        }
        catch (java.io.IOException e)
        {
            // Ignore a non-existing options file.
        }
    }

    public void Save (String sBaseName)
    {
        ProvideFile(sBaseName);
        Save ();
    }

    public void Save ()
    {
        if (maFile != null)
        {
            try
            {
                store (new FileOutputStream (maFile), null);
            }
            catch (java.io.IOException e)
            {
            }
        }
    }

    private Options ()
    {
        maFile = null;
    }

    private File ProvideFile (String sBaseName)
    {
        maFile = new File (
            System.getProperty ("user.home"),
            sBaseName);
        return maFile;
    }

    static private Options saOptions = null;
    private File maFile;
}