protected MessageSource createMessageSource(String basename) 
{
		ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
		messageSource.setBasename(basename);
		return messageSource;
}

Create a MessageSource for the given basename, to be used as MessageSource for the corresponding theme.

Default implementation creates a ResourceBundleMessageSource. for the given basename. A subclass could create a specifically configured ReloadableResourceBundleMessageSource, for example.

 public ThemeSource getParentThemeSource() 
{
		return this.parentThemeSource;
}

 public Theme getTheme(String themeName) 
{
		if (themeName == null) {
			return null;
		}
		synchronized (this.themeCache) {
			Theme theme = (Theme) this.themeCache.get(themeName);
			if (theme == null) {
				String basename = this.basenamePrefix + themeName;
				MessageSource messageSource = createMessageSource(basename);
				theme = new SimpleTheme(themeName, messageSource);
				initParent(theme);
				this.themeCache.put(themeName, theme);
				if (logger.isDebugEnabled()) {
					logger.debug("Theme created: name '" + themeName + "', basename [" + basename + "]");
				}
			}
			return theme;
		}
}

This implementation returns a SimpleTheme instance, holding a ResourceBundle-based MessageSource whose basename corresponds to the given theme name (prefixed by the configured "basenamePrefix").

SimpleTheme instances are cached per theme name. Use a reloadable MessageSource if themes should reflect changes to the underlying files.

 protected  void initParent(Theme theme) 
{
		if (theme.getMessageSource() instanceof HierarchicalMessageSource) {
			HierarchicalMessageSource messageSource = (HierarchicalMessageSource) theme.getMessageSource();
			if (getParentThemeSource() != null && messageSource.getParentMessageSource() == null) {
				Theme parentTheme = getParentThemeSource().getTheme(theme.getName());
				if (parentTheme != null) {
					messageSource.setParentMessageSource(parentTheme.getMessageSource());
				}
			}
		}
}

Initialize the MessageSource of the given theme with the one from the corresponding parent of this ThemeSource.

 public  void setBasenamePrefix(String basenamePrefix) 
{
		this.basenamePrefix = (basenamePrefix != null ? basenamePrefix : "");
}

Set the prefix that gets applied to the ResourceBundle basenames, i.e. the theme names. E.g.: basenamePrefix="test.", themeName="theme" -> basename="test.theme".

Note that ResourceBundle names are effectively classpath locations: As a consequence, the JDK's standard ResourceBundle treats dots as package separators. This means that "test.theme" is effectively equivalent to "test/theme", just like it is for programmatic java.util.ResourceBundle usage.

 public  void setParentThemeSource(ThemeSource parent) 
{
	    
		this.parentThemeSource = parent;
		// Update existing Theme objects.
		// Usually there shouldn't be any at the time of this call.
		synchronized (this.themeCache) {
			Iterator it = this.themeCache.values().iterator();
			while (it.hasNext()) {
				initParent((Theme) it.next());
			}
		}
}