Template Loop – add switch case php

if ( $query->have_posts() ) : ?>
    <ul id="list-con">
    <?php
        while ($query->have_posts()) :
            $query->the_post();
    ?>
        <?php
             switch ( get_post_type( $post->ID ) ) {
                 case "firstcase":
                     ?>
                     <li>code as defined above</li>
                     <?php
                     break;

                 case "secondcase":
                     ?>
                     <li>another code as defined above</li>
                     <?php
                     break;
             }
        ?>
    <?php
        endwhile; 
    ?>
    </ul>
<?php endif;