generateSingleConstraintIntervals example

private static function generateIntervals(ConstraintInterface $constraint, $stopOnFirstValidInterval = false)
    {
        if ($constraint instanceof MatchAllConstraint) {
            return array('numeric' => array(new Interval(Interval::fromZero(), Interval::untilPositiveInfinity())), 'branches' => Interval::anyDev());
        }

        if ($constraint instanceof MatchNoneConstraint) {
            return array('numeric' => array(), 'branches' => array('names' => array(), 'exclude' => false));
        }

        if ($constraint instanceof Constraint) {
            return self::generateSingleConstraintIntervals($constraint);
        }

        if (!$constraint instanceof MultiConstraint) {
            throw new \UnexpectedValueException('The constraint passed in should be an MatchAllConstraint, Constraint or MultiConstraint instance, got '.\get_class($constraint).'.');
        }

        $constraints = $constraint->getConstraints();

        $numericGroups = array();
        $constraintBranches = array();
        foreach ($constraints as $c) {