title: JSF/Primefaces datatable: Filtering based on checkbox-selected fields
body: <p>I am trying to extend my filtering function to make it more convenient.</p>
  
  <p>I don't want to create a column header search and a global search input field but only one field  used for all. I want to offer an fading div with label "More" showing checkboxes for a set of fields to search against.</p>
  
  <p>Now, when trying to implement this feature I need to send additional data to the server, which boxes are currently checked.</p>
  
  <p>The reflection method is: </p>
  
  <p>public List load(int first, int pageSize, List multiSortMeta, Map filters) {...}</p>
  
  <p>... as I see, there is no way to handle this, is it? Is there any way to make the model more flexible?</p>
  
  <p>It it furthermore possible to send all (but also empty filters) to the Map filter parameter of the server?</p>