poolbase.php

См. документацию.

<?php
namespace Bitrix\Sale\Internals;
 
class PoolBase
{
    protected static $pool = array();
    protected static $index = 0;
 
    public static function getPoolByCode($code)
    {
        if (isset(static::$pool[$code]))
        {
            return static::$pool[$code];
        }
 
        return null;
    }
 
    public static function get($code, $type)
    {
        if (isset(static::$pool[$code][$type]))
        {
            return static::$pool[$code][$type];
        }
 
        return null;
    }

    public static function getByIndex($code, $type, $index)
    {
        if (isset(static::$pool[$code][$type][$index]))
        {
            return static::$pool[$code][$type][$index];
        }
 
        return null;
    }

    public static function add($code, $type, $value)
    {
        static::$index++;
        static::$pool[$code][$type][static::$index] = $value;
    }

    public static function delete($code, $type, $index)
    {
        if (isset(static::$pool[$code][$type][$index]))
        {
            unset(static::$pool[$code][$type][$index]);
        }
    }

    public static function isTypeExists($code, $type)
    {
        return (!empty(static::$pool[$code][$type]));
    }

    public static function resetPool($code = null, $type = null)
    {
        if ($code !== null)
        {
            if ($type !== null)
            {
                unset(static::$pool[$code][$type]);
            }
            else
            {
                unset(static::$pool[$code]);
            }
        }
        else
        {
            static::$pool = array();
        }
 
        if (empty(static::$pool[$code]))
        {
            unset(static::$pool[$code]);
        }
    }
}