Custom post type template loading

CustomTemplate.php

<?php
add_filter( 'single_template', array(
			__CLASS__,
			'get_custom_post_type_template'
		), 10, 1 );
		
		
public function get_custom_post_type_template( $single_template ) {
		global $post;

		if ( $post->post_type == self::$_post_type ) {
			$single_template = dirname( __FILE__ ) . '/../templates/template-folder/template.php';
		}

		return $single_template;
	}