SimpleORMap.class.php

<?php
/**
 * SimpleORMap.class.php
 * simple object-relational mapping
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * @author      André Noack <noack@data-quest.de>
 * @copyright   2010 Stud.IP Core-Group
 * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
 * @category    Stud.IP
*/

class SimpleORMap implements ArrayAccess, Countable, IteratorAggregate
{
    /**
     * Defines `_` as character used when joining composite primary keys.
     */
    const ID_SEPARATOR = '_';

    /**
     * table row data
     * @var array $content
     */
    protected $content = [];

    /**
     * table row data
     * @var array $content_db
     */
    protected $content_db = [];

    /**
     * new state of entry
     * @var boolean $is_new
     */
    protected $is_new = true;

    /**
     * deleted state of entry
     * @var boolean $is_deleted
     */
    protected $is_deleted = false;

     /**
     * db table metadata
     * @var ?array $schemes;
     */
    public static $schemes = null;

    /**
     * configuration data for subclasses
     * @see self::configure()
     * @var array $config;
     */
    protected static $config = [];

    /**
     * stores instantiated related objects
     * @var array $relations
     */
    protected $relations = [];

    /**
     * assoc array for storing values for additional fields
     *
     * @var array $additional_data