title: JackRabbit: textFilterClasses deprecated. How to specify extractors?
body: <p>My <strong>Jackrabbit 2.4</strong> says, that <strong>textFilterClasses</strong> parameter of <strong>SearchIndex</strong> element is deprecated and ignored. When I remove the <strong>textFilterClasses</strong> parameter all together, it indexes Pdf, Rtf - everything.</p>
  
  <p>How does it know, what binary files it should index, when I'm not specifying no extractors?</p>
  
  <p>API says it's deprecated, but doesn't provide any alternative.</p>
  
  <p>Thank you!</p>