Registry.java

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package org.libcsdbg.jtracer.installer;

import java.util.Vector;
import java.util.Hashtable;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.io.IOException;

import java.net.URL;

import java.awt.Font;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Image;

import javax.swing.ImageIcon;
import javax.swing.filechooser.FileSystemView;

public class Registry extends Hashtable<String, Hashtable<String, Object>>
{
  private static final long serialVersionUID = 0x00;

  private static Registry current = null;


  Registry()
  {
    current = this;

    Hashtable<String, Object> section = new Hashtable<String, Object>();
    section.put("font", new Font("Dialog", Font.PLAIN, 12));
    section.put("fgcolor", Color.decode("0x646464"));
    section.put("click-delay", new Integer(100));
    put("component", section);

    section = new Hashtable<String, Object>();
    section.put("font", new Font("Dialog", Font.PLAIN, 12));
    section.put("fgcolor", Color.decode("0x646464"));
    put("message", section);

    section = new Hashtable<String, Object>();
    section.put("font", new Font("Dialog", Font.BOLD, 12));
    section.put("fgcolor", Color.decode("0x646464"));
    put("caption", section);

    section = new Hashtable<String, Object>();
    section.put("font", new Font("Dialog", Font.BOLD, 10));
    section.put("fgcolor", Color.decode("0x76a6c7"));
    put("progressbar", section);
    
    section = new Hashtable<String, Object>();
    section.put("name", "jTracer");
    section.put("version", "1.03");
    section.put("license", "GNU General Public License v3.0");
    section.put("package", "jTracer-1.03");
    section.put("jar", "jTracer-1.03.jar");
    put("installed", section);

    section = new Hashtable<String, Object>();
    section.put("name", "jTracer.installer");
    section.put("version", "1.0");
    section.put("debug", "on");
    section.put("console", "on");
    section.put("size", new Dimension(520, 360));
    section.put("lnf", "javax.swing.plaf.metal.MetalLookAndFeel");
    section.put("browser", "firefox");
    section.put("mailer", "thunderbird");
    put("generic", section);
  }


  public Object get(String section, String key)
  {
    return get(section).get(key);
  }


  public boolean test(String section, String key)
  {
    String entry = (String) get(section, key);
    if (entry == null)
      return false;

    return entry.toLowerCase().equals("on");
  }


  public File getResource(String path) throws IOException
  {
    if (File.separator.equals("/"))
      return new File(getPrefix(), "res/" + path);

    path = "res/" + path;
    path.replace("/", File.separator);
    return new File(getPrefix(), path);
  }


  public ImageIcon loadIcon(String nm)
  {
    try {
      File f = getResource("theme/default/icons/" + nm);
      return new ImageIcon(f.getCanonicalPath());
    }

    catch (Throwable t) {
      debug(t);
    }

    return null;
  }


  public void browse(URL url)
  {
    try {
      String browser = (String) get("generic", "browser");
      ProcessBuilder proc = new ProcessBuilder(browser, url.toString());
      proc.start();
    }

    catch (Throwable t) {
      debug(t);
    }
  }


  public void mail(URL url)
  {
    try {
      String mailer = (String) get("generic", "mailer");
      ProcessBuilder proc = new ProcessBuilder(mailer, url.toString());
      proc.start();
    }

    catch (Throwable t) {
      debug(t);
    }
  }


  public void setup() throws IOException
  {
    if (test("generic", "console"))
      return;

    long id = System.currentTimeMillis();
    File log = getResource("var/dbg-" + id + ".log");
    log.createNewFile();

    System.out.println("\r\nOutput log: " + log.getCanonicalPath());
    FileOutputStream fs = new FileOutputStream(log, true);
    PrintStream ps = new PrintStream(fs, true);
    System.setOut(ps);
    System.setErr(ps);
  }


  public Vector<Image> getProjectIcons()
  {
    Vector<Image> retval = new Vector<Image>();
    for (int i = 16; i <= 128; i *= 2) {
      ImageIcon icon = loadIcon("icon" + i + ".png");
      if (icon != null)
        retval.add(icon.getImage());
    }

    return retval;
  }


  public static Registry getCurrent()
  {
    return current;
  }


  public static void setCurrent(Registry cur)
  {
    current = cur;
  }


  public static File getHomeDirectory() throws IOException
  {
    File retval = FileSystemView.getFileSystemView().getHomeDirectory();
    String path = retval.getCanonicalPath();

    String msg = null;
    if (!retval.isDirectory())
      msg = "The user home directory '" + path + "' doesn't exist";

    else if (!retval.canRead())
      msg = "Can't access the user home directory '" + path + "'";

    if (msg != null)
      throw new IOException(msg);

    return retval;
  }


  public static File getPrefix() throws IOException
  {
    String tmpdir = System.getProperty("java.io.tmpdir");
    File retval = new File(tmpdir, ".jTracer.installer");
    String path = retval.getCanonicalPath();

    String msg = null;
    if (!retval.isDirectory())
      msg = "The installation directory '" + path + "' doesn't exist";

    else if (!retval.canRead())
      msg = "Can't access the installation directory '" + path + "'";

    if (msg != null)
      throw new IOException(msg);

    return retval;
  }


  public synchronized static void debug(Throwable err)
  {
    Registry conf = Registry.getCurrent();
    if (conf != null && !conf.test("generic", "debug"))
      return;

    Thread thr = Thread.currentThread();
    System.err.println("at thread " + thr.getName() + ":" + thr.getId());
    err.printStackTrace();
  }


  public synchronized static void debug(String msg)
  {
    Registry conf = Registry.getCurrent();
    if (conf != null && !conf.test("generic", "debug"))
      return;

    Thread thr = Thread.currentThread();
    System.err.println("at thread " + thr.getName() + ":" + thr.getId());
    System.err.println(msg);
  }


  public static String getOsName()
  {
    return System.getProperty("os.name");
  }


  public static boolean isLinux()
  {
    String os = getOsName();
    if (os == null)
      return false;

    return os.matches("Linux");
  }
}