Localization of plugin titles
-----------------------------

                 Key: FELIX-2158
                 URL: https://issues.apache.org/jira/browse/FELIX-2158
             Project: Felix
          Issue Type: Improvement
          Components: Web Console
            Reporter: Valentin Valchev


We have added localization support, but there is one thing missing - the titles 
of the plugins, that are rendered on top.

So now, even though the plugins are completely localized, the navigation 
between the plugins is not. However, we need to keep the web console compatible 
with the old API, so the change should be transparent.

I've been thinking about the problem and came to the following solution:

when request is made, the webconsole will:
1. obtain the resource bundle for plugins
2. for each plugin
3. get the localized title, which is a resource key <pluginLabel>.pluginTitle
4. if the localized title doesn't exist - then use the default title
5. fill in the labelMap table

the reason for using <pluginLabel>.pluginTitle instead of some other constant 
name is that a bundle can provide more than one plugins, as example webconsole 
itself. In this case we need to provide titles for all plugins and this 
involves the label.

This can be achieved easily by adding the following method in OsgiManager:
    private final Map localizedLabelMap(final Locale locale)
    {
        Map map = new HashMap();
        ResourceBundle resourceBundle;
        AbstractWebConsolePlugin plugin;
        String label;
        String title;
        for (Iterator pi = plugins.values().iterator(); pi.hasNext();)
        {
            plugin = (AbstractWebConsolePlugin) pi.next();
            resourceBundle = 
resourceBundleManager.getResourceBundle(plugin.getBundle(),
                locale);
            label = plugin.getLabel();
            title = plugin.getTitle();
            try
            {
                final String res = plugin.getLabel() + ".pluginTitle";
                title = resourceBundle.getString(res);
                // our Resource Bundle doesn't throw exception, so if
                // the value is same as the property key - revert to
                // the original title
                if (title.equals(res))
                {
                    title = plugin.getTitle();
                }
            }
            catch (Throwable e)
            {
                /* ignore missing resource - use default title */
            }
            map.put(label, title);
        }

        return map;
    }

and modify the service() method as follows:
            Map labelMap = localizedLabelMap(request.getLocale());
            // the official request attributes
            req.setAttribute( WebConsoleConstants.ATTR_LABEL_MAP, labelMap );


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