public String getPreferredLanguage()

in velocity-tools-view/src/main/java/org/apache/velocity/tools/view/BrowserTool.java [520:551]

29 lines of code
9 McCabe index (conditional complexity)


    public String getPreferredLanguage()
    {
        if(preferredLanguage != null) return preferredLanguage;

        parseAcceptLanguage();
        if(languageRangesByQuality.size() == 0)
        {
            preferredLanguage = starLanguageRange; // may be null
        }
        else
        {
            List<List<String>> lists = new ArrayList<List<String>>(languageRangesByQuality.values());
            Collections.reverse(lists);
            for(List<String> lst : lists) // sorted by quality (treemap)
            {
                for(String l : lst)
                {
                    preferredLanguage = filterLanguageTag(l);
                    if(preferredLanguage != null) break;
                }
                if(preferredLanguage != null) break;
            }
        }
        // fallback
        if(preferredLanguage == null)
        {
            preferredLanguage = filterLanguageTag(languagesFilter == null ? getLocale().getLanguage() : languagesFilter.get(0));
        }
        // preferredLanguage should now never be null
        assert(preferredLanguage != null);
        return preferredLanguage;
    }