code: public void setFilter( final String attributeName, final String value )
      {
          filter = new FilterSequence( attributeName, value ).toString();
      }
docs: Set up a standard filter attribute name and value pair.
  
  <table border="1"><caption>Example Values</caption>
  <tr><td><b>Attribute</b></td><td><b>Value</b></td></tr>
  <tr><td>givenName</td><td>John</td></tr>
  </table>
  <p><i>Result</i></p>
  <code>(givenName=John)</code>
  
  @param attributeName A valid attribute name
  @param value         A value that, if it exists, will cause the object to be included in result set.