<?php
switch ($this->getLoadType()) {
    case self::LOAD_TYPE_PAGINATION:
        // Create the paginator as you wish.
        // Because I'm using Doctrine, I have a $query variable and pass it
        // to the Doctrine's paginator adapter for Zend\Paginator.
        $paginator;

        $items = $paginator->getCurrentItems();
        break;

    case self::LOAD_TYPE_INFINITE_SCROLL:
        // Items per page
        $itemCount = 24;

        // How many portions have been loaded so far.
        // By default 1 portion has been loaded.
        $portions = $queryParams['portions'] ?: 1;

        // Which portion to load (used in AJAX requests).
        // Works like some kind of an offset.
        $portion = $queryParams['portion'];

        // Let's calculate the limit from the portions that have to be loaded
        // times the item count per page (per scroll).
        $limit = $portions * $itemCount;
        $offset = 0;

        // If we are loading a specific portion (via AJAX)
        // the portion query param will be specified.
        if ($portion) {
            // The limit is the item count
            $limit = $itemCount;

            // The offset is the portion that has to be loaded minus one (because it works as an index)
            // times the item count.
            $offset = ($portion - 1) * $itemCount;
        }

        // Here, I'm working with doctrine and I have a $queryBuilder variable,
        // so I just pass the $limit and $offset to it, but you could pass them to
        // any query (even to a plain old SQL)
        $items = $queryBuilder
            ->setMaxResults($limit)
            ->setFirstResult($offset)
            ->getQuery()
            ->getResult();
        break;
}