Making use of a wordpress loop in a class

wordpress template page class example

<?php
/**
 * Template Name: mytemplate-page
 * Description: a template page using a class
 * 
 */
?>
<?php
$args = array(
    "type"=>"post_type_name",
    "taxonomy"=>"post_type_category",
    "meta_id"=>"meta_id",
    );
$obj = new ThemeClass($args);
$obj->getData();
?>