code: public static Float getQuality(String value)
      {
          if (value==null)
              return __zero;
          
          int qe=value.indexOf(";");
          if (qe++<0 || qe==value.length())
              return __one;
          
          if (value.charAt(qe++)=='q')
          {
              qe++;
              Map.Entry entry=__qualities.getEntry(value,qe,value.length()-qe);
              if (entry!=null)
                  return (Float)entry.getValue();
          }
          
          HashMap params = new HashMap(3);
          valueParameters(value,params);
          String qs=(String)params.get("q");
          Float q=(Float)__qualities.get(qs);
          if (q==null)
          {
              try{q=new Float(qs);}
              catch(Exception e){q=__one;}
          }
          return q;
      }
docs: /* ------------------------------------------------------------