/**
  * Filter the query by a related Empleado object
  *
  * @param   Empleado|PropelObjectCollection $empleado The related object(s) to use as filter
  * @param     string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
  *
  * @return                 ExpedientearchivoQuery The current query, for fluid interface
  * @throws PropelException - if the provided filter is invalid.
  */
 public function filterByEmpleado($empleado, $comparison = null)
 {
     if ($empleado instanceof Empleado) {
         return $this->addUsingAlias(ExpedientearchivoPeer::IDEMPLEADO, $empleado->getIdempleado(), $comparison);
     } elseif ($empleado instanceof PropelObjectCollection) {
         if (null === $comparison) {
             $comparison = Criteria::IN;
         }
         return $this->addUsingAlias(ExpedientearchivoPeer::IDEMPLEADO, $empleado->toKeyValue('PrimaryKey', 'Idempleado'), $comparison);
     } else {
         throw new PropelException('filterByEmpleado() only accepts arguments of type Empleado or PropelCollection');
     }
 }