New I18n code, not used yet

Essentials/nbproject/pmd.settings

@@ -1,2 +1,3 @@
 DoNotUseThreads
+LongVariable
 SignatureDeclareThrowsException

Essentials/src/com/earth2me/essentials/I18n.java

@@ -0,0 +1,166 @@
+package com.earth2me.essentials;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.text.MessageFormat;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+import java.util.logging.Level;
+import org.bukkit.Bukkit;
+
+
+public class I18n
+{
+	private static I18n instance;
+	private static final String MESSAGES = "messages";
+	private final transient Locale defaultLocale = Locale.getDefault();
+	private transient Locale currentLocale = defaultLocale;
+	private transient ResourceBundle customBundle = ResourceBundle.getBundle(MESSAGES, defaultLocale);
+	private transient ResourceBundle localeBundle = ResourceBundle.getBundle(MESSAGES, defaultLocale);
+	private final transient ResourceBundle defaultBundle = ResourceBundle.getBundle(MESSAGES, Locale.ENGLISH);
+	private final transient Map<String, MessageFormat> messageFormatCache = new HashMap<String, MessageFormat>();
+
+	public I18n()
+	{
+		instance = this;
+	}
+
+	public Locale getCurrentLocale()
+	{
+		return currentLocale;
+	}
+
+	public String translate(final String string)
+	{
+		try
+		{
+			try
+			{
+				return customBundle.getString(string);
+			}
+			catch (MissingResourceException ex)
+			{
+				return localeBundle.getString(string);
+			}
+		}
+		catch (MissingResourceException ex)
+		{
+			Bukkit.getLogger().log(Level.WARNING, String.format("Missing translation key \"%s\" in translation file %s", ex.getKey(), localeBundle.getLocale().toString()), ex);
+			return defaultBundle.getString(string);
+		}
+	}
+
+	public static String _(final String string, final Object... objects)
+	{
+		if (objects.length == 0)
+		{
+			return instance.translate(string);
+		}
+		else
+		{
+			return instance.format(string, objects);
+		}
+	}
+
+	public String format(final String string, final Object... objects)
+	{
+		final String format = translate(string);
+		MessageFormat messageFormat = messageFormatCache.get(format);
+		if (messageFormat == null)
+		{
+			messageFormat = new MessageFormat(format);
+			messageFormatCache.put(format, messageFormat);
+		}
+		return messageFormat.format(objects);
+	}
+
+	public void updateLocale(final String loc, final IEssentials ess)
+	{
+		if (loc == null || loc.isEmpty())
+		{
+			return;
+		}
+		final String[] parts = loc.split("[_\\.]");
+		if (parts.length == 1)
+		{
+			currentLocale = new Locale(parts[0]);
+		}
+		if (parts.length == 2)
+		{
+			currentLocale = new Locale(parts[0], parts[1]);
+		}
+		if (parts.length == 3)
+		{
+			currentLocale = new Locale(parts[0], parts[1], parts[2]);
+		}
+		Bukkit.getLogger().log(Level.INFO, String.format("Using locale %s", currentLocale.toString()));
+		customBundle = ResourceBundle.getBundle(MESSAGES, currentLocale, new FileResClassLoader(I18n.class.getClassLoader(), ess));
+		localeBundle = ResourceBundle.getBundle(MESSAGES, currentLocale);
+	}
+
+	public static String lowerCase(final String input)
+	{
+		return input == null ? null : input.toLowerCase(Locale.ENGLISH);
+	}
+
+	public static String capitalCase(final String input)
+	{
+		return input == null || input.length() == 0 
+			   ? input
+			   : input.toUpperCase(Locale.ENGLISH).charAt(0)
+				 + input.toLowerCase(Locale.ENGLISH).substring(1);
+	}
+
+
+	private static class FileResClassLoader extends ClassLoader
+	{
+		private final transient File dataFolder;
+
+		public FileResClassLoader(final ClassLoader classLoader, final IEssentials ess)
+		{
+			super(classLoader);
+			this.dataFolder = ess.getDataFolder();
+		}
+
+		@Override
+		public URL getResource(final String string)
+		{
+			final File file = new File(dataFolder, string);
+			if (file.exists())
+			{
+				try
+				{
+					return file.toURI().toURL();
+				}
+				catch (MalformedURLException ex)
+				{
+				}
+			}
+			return super.getResource(string);
+		}
+
+		@Override
+		public InputStream getResourceAsStream(final String string)
+		{
+			final File file = new File(dataFolder, string);
+			if (file.exists())
+			{
+				try
+				{
+					return new FileInputStream(file);
+				}
+				catch (FileNotFoundException ex)
+				{
+				}
+			}
+			return super.getResourceAsStream(string);
+		}
+	}
+}