code: public void setDebugPatterns(String patterns)
      {
          _patterns=patterns;
          if (patterns!=null && patterns.length()>0)
          {
              _debugPatterns = new ArrayList();
  
              StringTokenizer tok = new StringTokenizer(patterns,", \t");
              while (tok.hasMoreTokens())
              {
                  String pattern = tok.nextToken();
                  _debugPatterns.add(pattern);
              }
          }
          else
              _debugPatterns = null;
      }
docs: Set debug patterns.
  @param patterns comma separated string of patterns