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   1  <?php
   2  
   3  abstract class PhabricatorFactEngine {
   4  
   5    final public static function loadAllEngines() {
   6      $classes = id(new PhutilSymbolLoader())
   7        ->setAncestorClass(__CLASS__)
   8        ->setConcreteOnly(true)
   9        ->selectAndLoadSymbols();
  10  
  11      $objects = array();
  12      foreach ($classes as $class) {
  13        $objects[] = newv($class['name'], array());
  14      }
  15  
  16      return $objects;
  17    }
  18  
  19    public function getFactSpecs(array $fact_types) {
  20      return array();
  21    }
  22  
  23    public function shouldComputeRawFactsForObject(PhabricatorLiskDAO $object) {
  24      return false;
  25    }
  26  
  27    public function computeRawFactsForObject(PhabricatorLiskDAO $object) {
  28      return array();
  29    }
  30  
  31    public function shouldComputeAggregateFacts() {
  32      return false;
  33    }
  34  
  35    public function computeAggregateFacts() {
  36      return array();
  37    }
  38  
  39  }