title: Filtering features in Openlayers 3
body: <p>When I was using Openlayers 2 I could compose various filters like <code>OpenLayers.Filter.Comparison.EQUAL_TO</code> or <code>OpenLayers.Filter.Comparison.LIKE</code> and then use a WFS protocol and a callback function to get features according to user input and those native WFS filters.</p>
  
  <p>In Openlayers 3 <a href="http://openlayers.org/en/v3.10.1/apidoc/ol.format.WFS.html" rel="nofollow">WFS</a>, I dont see those native filters. </p>
  
  <p>So, now, how do I get features according to user input? I get the input and make an old-fashioned query to the PostGIS? I reset the <code>ol.Vector</code> source <code>url</code>?</p>
  
  <p>Please provide some help, or some tutorials</p>
  
  <p>Thanks</p>