fabarea / vidi

     * @param Matcher $matcher

     * @return Content[]

     */

    public function findDistinctValues($propertyName, Matcher $matcher = null)

    {

        $query = $this->createQuery();

        $query->setDistinct($propertyName);

        // Remove empty values from selection.

        $constraint = $query->logicalNot($query->equals($propertyName, ''));

        // Add some additional constraints from the Matcher object.

        $matcherConstraint = null;

        if (!is_null($matcher)) {

            $matcherConstraint = $this->computeConstraints($query, $matcher);

        }

        // Assemble the final constraints or not.

        if ($matcherConstraint) {

            $query->logicalAnd($matcherConstraint, $constraint);

            $query->matching($query->logicalAnd($matcherConstraint, $constraint));

        } else {

            $query->matching($constraint);

        }

        return $query->execute();

    }

    /**

     * Returns all "distinct" values for a given property.

     * @param Matcher $matcher

     * @return int

     */

    public function countDistinctValues($propertyName, Matcher $matcher = null)

    {

        $query = $this->createQuery();

        $query->setDistinct($propertyName);

        // Remove empty values from selection.

        $constraint = $query->logicalNot($query->equals($propertyName, ''));

        // Add some additional constraints from the Matcher object.

        $matcherConstraint = null;

        if (!is_null($matcher)) {

            $matcherConstraint = $this->computeConstraints($query, $matcher);

        }

        // Assemble the final constraints or not.

        if ($matcherConstraint) {

            $query->logicalAnd($matcherConstraint, $constraint);

            $query->matching($query->logicalAnd($matcherConstraint, $constraint));

        } else {

            $query->matching($constraint);

        }

        return $query->count();

    }

    /**

     * Finds an object matching the given identifier.