J2Store to J2Commerce Function Reference

This document maps every major J2Store v4 helper function to its J2Commerce 6 equivalent. Every entry was grep-confirmed against both source trees. Use it as a lookup when porting payment plugins, shipping plugins, or any extension that calls J2Store::* or J2StoreHelper*.

Source of truth: administrator/components/com_j2commerce/src/Helper/

Comparison base: administrator/components/com_j2store/helpers/

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Overview

J2Store v4 exposed its API through a static facade class (J2Store) backed by individual helper classes (J2Config, J2Currency, J2Cart, etc.) built on FOF 2. J2Commerce 6 replaces this with:

• A single facade class J2CommerceHelper in src/Helper/J2CommerceHelper.php
• Individual stateful helper classes in the same src/Helper/ directory
• A native Joomla 6 MVC factory (getMVCFactory()->createTable() / createModel()) in place of J2Store::fof()
• Namespaced services injected via services/provider.php for plugin registration

The method names and arguments are largely preserved. The main breaking changes are:

1. Plugin event prefix changes from onJ2Store* to onJ2Commerce*
2. PluginHelper::event() returns a PluginEvent object, not a raw array
3. Event handlers write results with $event->addResult($value) instead of returning them
4. FOF 2 table/model access is replaced by the Joomla MVC factory
5. ConfigHelper has no persistence method — config is stored in #__extensions.params

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Most-Used Quick Reference

The 15 calls that appear in almost every extension migration.

#	J2Store	J2Commerce 6
1	J2Store::config()->get('key', $default)	J2CommerceHelper::config()->get('key', $default)
2	J2Store::config()->saveOne('key', $value)	No direct equivalent — save via the config Model writing to #__extensions.params
3	J2Store::plugin()->event('Xxx', $args) → use return array	J2CommerceHelper::plugin()->event('Xxx', $args) → $event->getEventResult()
4	J2Store::currency()->format($number, $currency)	J2CommerceHelper::currency()->format($number, $currency)
5	J2Store::product()->setId($id)->getProduct()	J2CommerceHelper::product()->setId($id)->getProduct()
6	J2Store::cart()->getSubtotal($items)	J2CommerceHelper::cart()->getSubtotal($items)
7	J2Store::fof()->loadTable('Order','J2StoreTable')	Factory::getApplication()->bootComponent('com_j2commerce')->getMVCFactory()->createTable('Order','Administrator')
8	F0FModel::getTmpInstance('Orders','J2StoreModel')	$mvcFactory->createModel('Orders','Administrator',['ignore_request'=>true])
9	JFactory::getDbo()	$this->getDatabase() (Models/Tables with DatabaseAwareTrait)
10	JFactory::getApplication()->triggerEvent('onJ2StoreXxx', $args)	J2CommerceHelper::plugin()->event('Xxx', $args)
11	J2StorePlatform::getProductUrl($params)	Route::_(RouteHelper::getProductRoute($id, $alias, $catid))
12	$order->order_state_id = X; $order->store()	$orderModel->updateOrderStatus($orderId, $statusId, $notify, $comment)
13	J2Store::user()->createNewUser($details, $msg)	UserHelper::createNewUser(array $details, bool $sendMail=true)
14	J2Store::email()->getOrderEmails($order, 'customer')	J2CommerceHelper::email()->getOrderEmails($order, 'customer')
15	J2Store::strapper()->addJS()	J2CommerceHelper::strapper()->addJS() (uses Web Asset Manager internally)

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J2Store::* Static Facade Methods

J2Store source: administrator/components/com_j2store/helpers/j2store.php:41

J2Store function (file:line, signature)	J2Commerce 6 equivalent (file:line, signature)	Notes / behavior change
J2Store::config(array $config=[]): J2Config (j2store.php:78)	J2CommerceHelper::config(): ConfigHelper (J2CommerceHelper.php:345)	J2C returns ConfigHelper. J2Store read #__j2store_configurations; J2C reads com_j2commerce component params via ComponentHelper.
J2Store::storeProfile(array $config=[]): J2Config (j2store.php:53)	J2CommerceHelper::storeProfile(): ConfigHelper (J2CommerceHelper.php:374)	Alias for config() in both systems.
J2Store::product(array $config=[]): J2Product (j2store.php:58)	J2CommerceHelper::product(array $config=[]): ProductHelper (J2CommerceHelper.php:311)	Same stateful fluent API (setId(), getProduct(), getPrice(), etc.).
J2Store::currency(array $config=[]): J2Currency (j2store.php:63)	J2CommerceHelper::currency(array $config=[]): CurrencyHelper (J2CommerceHelper.php:216)	Signatures identical; J2C adds new methods.
J2Store::length(): J2Length (j2store.php:68)	J2CommerceHelper::length(array $config=[]): LengthHelper (J2CommerceHelper.php:241)	J2C adds $config arg.
J2Store::weight(): J2Weight (j2store.php:72)	J2CommerceHelper::weight(array $config=[]): WeightHelper (J2CommerceHelper.php:181)	Same purpose.
J2Store::cart(array $config=[]): J2Cart (j2store.php:83)	J2CommerceHelper::cart(array $config=[]): CartHelper (J2CommerceHelper.php:414)	Methods renamed — see Cart Helper section.
J2Store::user(array $config=[]): J2User (j2store.php:88)	J2CommerceHelper::user(array $config=[]): UserHelper (J2CommerceHelper.php:449)	Now fully static methods on UserHelper.
J2Store::plugin(array $config=[]): J2Plugins (j2store.php:93)	J2CommerceHelper::plugin(array $config=[]): PluginHelper (J2CommerceHelper.php:539)	event() return type changed — see Plugin/Event Dispatch section.
J2Store::email(array $config=[]): J2Email (j2store.php:98)	J2CommerceHelper::email(array $config=[]): EmailHelper (J2CommerceHelper.php:570)	Same surface; J2C adds type-registry static methods.
J2Store::invoice(array $config=[]): J2Invoice (j2store.php:103)	J2CommerceHelper::invoice(array $config=[]): InvoiceHelper (J2CommerceHelper.php:623)	Same purpose.
J2Store::utilities(array $config=[]): J2Utilities (j2store.php:108)	J2CommerceHelper::utilities(array $config=[]): UtilitiesHelper (J2CommerceHelper.php:651)	Methods renamed to camelCase — see Utilities section.
J2Store::article(array $config=[]): J2Article (j2store.php:113)	J2CommerceHelper::article(array $config=[]): ArticleHelper (J2CommerceHelper.php:692)	Same purpose.
J2Store::modules(array $config=[]): J2Modules (j2store.php:118)	J2CommerceHelper::modules(array $config=[]): ModulesHelper (J2CommerceHelper.php:726)	Same purpose.
J2Store::help(array $config=[]): J2Help (j2store.php:131)	No direct equivalent	J2Help class removed. Use J2CommerceHelper::buildHelpLink(string $url, string $content='app'): string (J2CommerceHelper.php:834) instead.
J2Store::view(array $config=[]): J2ViewHelper (j2store.php:135)	J2CommerceHelper::view(array $config=[]): ViewHelper (J2CommerceHelper.php:749)	Same purpose.
J2Store::isPro(): bool (j2store.php:139)	J2CommerceHelper::isPro(): bool (J2CommerceHelper.php:814)	J2S checked J2STORE_PRO constant; J2C checks J2COMMERCE_PRO.
J2Store::buildHelpLink(string $url, string $content='app'): string (j2store.php:144)	J2CommerceHelper::buildHelpLink(string $url, string $content='app'): string (J2CommerceHelper.php:834)	Identical signature. UTM domain changed to docs.j2commerce.com.
J2Store::buildSiteLink(string $url, string $content='app'): string (j2store.php:158)	J2CommerceHelper::buildSiteLink(string $url, string $content='app'): string (J2CommerceHelper.php:856)	Identical signature.
J2Store::queue(array $config=[]): J2Queue (j2store.php:172)	J2CommerceHelper::queue(array $config=[]): QueueHelper (J2CommerceHelper.php:476)	Same purpose.
J2Store::strapper(array $config=[]): J2StoreStrapper (j2store.php:177)	J2CommerceHelper::strapper(array $config=[]): StrapperHelper (J2CommerceHelper.php:782)	See Strapper section.
J2Store::platform(array $config=[]): J2StorePlatform (j2store.php:180)	J2CommerceHelper::platform(array $config=[]): PlatformHelper (J2CommerceHelper.php:797)	URL methods moved to RouteHelper; event dispatch moved to PluginHelper::event().
J2Store::fof(array $config=[]): J2F0F (j2store.php:183)	No direct equivalent	J2F0F is an FOF 2 shim. Use Factory::getApplication()->bootComponent('com_j2commerce')->getMVCFactory()->createTable() / createModel().
J2Store::image(array $config=[]): J2Image (j2store.php:187)	J2CommerceHelper::image(array $config=[]): ImageHelper (J2CommerceHelper.php:675)	Same purpose.
J2Store::getSelectableBase(): J2StoreSelectableBase (j2store.php:123)	No direct equivalent	Selectable fields concept removed from J2C.
J2Store::getSelectableFields(): J2StoreSelectableFields (j2store.php:127)	No direct equivalent	Same as above.
J2Store::message(…)	J2CommerceHelper::message(…) (J2CommerceHelper.php:598)	Real equivalent in J2C.
J2Store::addSubmenu(string $vName) (j2store.php:44)	J2CommerceHelper::addSubmenu(string $vName) (J2CommerceHelper.php:45)	J2S used FOF toolbar; J2C uses Sidebar::addEntry().

Before / After — Static Facade

// J2Store v4
$currency = J2Store::currency();
$formatted = $currency->format($price, 'USD');

$product = J2Store::product()->setId($productId)->getProduct();

$helpUrl = J2Store::buildHelpLink('https://docs.j2store.org/path', 'app');

// J2Commerce 6
// File: plugins/j2commerce/payment_example/src/Extension/PaymentExample.php
use J2Commerce\Component\J2commerce\Administrator\Helper\J2CommerceHelper;
use J2Commerce\Component\J2commerce\Site\Helper\RouteHelper;

$currency = J2CommerceHelper::currency();
$formatted = $currency->format($price, 'USD');

$product = J2CommerceHelper::product()->setId($productId)->getProduct();

$helpUrl = J2CommerceHelper::buildHelpLink('https://docs.j2commerce.com/path', 'app');

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Configuration Helper

J2Store source: helpers/config.php:13 J2Commerce source: src/Helper/ConfigHelper.php

J2Store method (file:line)	J2Commerce equivalent (file:line)	Notes
J2Config::getInstance(array $config=[]): J2Config (config.php:27)	ConfigHelper::getInstance(): ConfigHelper (ConfigHelper.php:30)	J2C reads Joomla component params, not #__j2store_configurations.
J2Config::get(string $property, string $default=''): mixed (config.php:44)	ConfigHelper::get(string $key, mixed $default=''): mixed (ConfigHelper.php:48)	Same intent. 130+ typed accessor methods also available (e.g. ConfigHelper::getStoreName()).
J2Config::set(string $namekey, mixed $value='') (config.php:37)	ConfigHelper::set(string $key, mixed $value): void (ConfigHelper.php:108)	In-memory mutation only in both versions.
J2Config::toArray(): array (config.php:51)	ConfigHelper::toArray(): array (ConfigHelper.php:113)	Same.
J2Config::saveOne(string $metakey, mixed $value): bool (config.php:61)	No direct equivalent in ConfigHelper	ConfigHelper has no persistence method. set() mutates the in-memory Registry only. To persist, save through the J2Commerce config Model/Table, which writes #__extensions.params.

Before / After — Configuration Access

// J2Store v4
$config = J2Store::config();
$storeName   = $config->get('storename', '');
$adminEmail  = $config->get('notification_email', '');
$config->saveOne('storename', 'My New Name'); // persists to #__j2store_configurations

// J2Commerce 6
// File: plugins/j2commerce/payment_example/src/Extension/PaymentExample.php
use J2Commerce\Component\J2commerce\Administrator\Helper\J2CommerceHelper;

$config      = J2CommerceHelper::config();
$storeName   = $config->get('storename', '');
$adminEmail  = $config->getAdminEmail(); // typed accessor — preferred

// In-memory mutation only — $config->set('storename', 'My New Name');
// To persist config changes, use the J2Commerce config Model/Table,
// which writes the full params JSON back to #__extensions.

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Plugin / Event Dispatch

J2Store source: helpers/plugin.php:17

J2Store pattern (file:line)	J2Commerce 6 equivalent (file:line)	Notes
J2Plugins::getInstance() (plugin.php:26)	PluginHelper::getInstance(array $config=[]): self	Singleton.
J2Plugins::getPluginsWithEvent(string $eventName, string $folder='J2Store'): array (plugin.php:43)	PluginHelper::getPluginsWithEvent(string $eventName, string $folder='J2Commerce'): array	Default folder changed from J2Store to J2Commerce.
J2Plugins::getPlugins(string $folder='J2Store'): array (plugin.php:68)	PluginHelper::getPlugins(string $folder='J2Commerce'): array	Default folder changed; raw SQL replaced with parameterized query.
J2Plugins::getPlugin(string $element, string $folder='j2store') (plugin.php:100)	PluginHelper::getPlugin(string $element, string $folder='j2commerce')	Default folder changed.
J2Plugins::getPluginsContent(string $event, array $options, string $method='vertical'): string (plugin.php:127)	PluginHelper::getPluginsContent(string $event, array $options, string $method='vertical'): string	Same.
J2Plugins::hasEvent(object $element, string $eventName): bool (plugin.php:170)	PluginHelper::hasEvent(string $element, string $eventName): bool	J2C takes element string, not object.
J2Plugins::enableJ2StorePlugin(): bool (plugin.php:192)	PluginHelper::enableJ2CommercePlugin(): bool	Enables system/j2commerce (was system/j2store).
J2Plugins::importCatalogPlugins(): void (plugin.php:205)	PluginHelper::importCatalogPlugins(): void	Same.
J2Plugins::event(string $event, array $args=[], string $prefix='onJ2Store'): array (plugin.php:208)	PluginHelper::event(string $event, array $args=[], string $prefix='onJ2Commerce'): PluginEvent	CRITICAL CHANGE. Return type changed from array to PluginEvent. Use $event->getEventResult() or $event->getArgument('result', []).
J2Plugins::eventWithHtml(string $event, array $args=[], string $prefix='onJ2Store'): string (plugin.php:227)	PluginHelper::eventWithHtml(string $event, array $args=[], string $prefix='onJ2Commerce'): PluginEvent	Same purpose; prefix default changed.
J2Plugins::eventWithArray(string $event, array $args=[], string $prefix='onJ2Store'): array (plugin.php:240)	PluginHelper::eventWithArray(string $event, array $args=[], string $prefix='onJ2Commerce'): array	Return type preserved as array for this variant.

Before / After — Plugin Event Dispatch

// J2Store v4
// Dispatch returns a plain array of return values from all handlers
$results = J2Store::plugin()->event('AfterPayment', ['order' => $order]);
foreach ($results as $result) {
    // process each handler's return value
}

// Handler registered by returning a value
public function onJ2StoreAfterPayment($order): string
{
    return '<p>Payment confirmed</p>';
}

// J2Commerce 6
// File: plugins/j2commerce/payment_example/src/Extension/PaymentExample.php
use J2Commerce\Component\J2commerce\Administrator\Helper\J2CommerceHelper;
use Joomla\Event\SubscriberInterface;

// Dispatch — returns PluginEvent, not array
$pluginEvent = J2CommerceHelper::plugin()->event('AfterPayment', ['order' => $order]);
$results     = $pluginEvent->getEventResult();

// Handler registered via SubscriberInterface
public static function getSubscribedEvents(): array
{
    return ['onJ2CommerceAfterPayment' => 'onAfterPayment'];
}

public function onAfterPayment(\Joomla\Event\Event $event): void
{
    $order = $event->getArgument('order');
    // Write result to event — do NOT return it
    $event->addResult('<p>Payment confirmed</p>');
}

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Currency Helper

J2Store source: helpers/currency.php:8 J2Commerce source: src/Helper/CurrencyHelper.php

J2Store method (file:line)	J2Commerce equivalent (file:line)	Notes
J2Currency::getInstance(array $config=[]): J2Currency (currency.php:47)	CurrencyHelper::getInstance(?array $properties=null): CurrencyHelper (CurrencyHelper.php:49)	Singleton.
J2Currency::set(string $currency): void (currency.php:58)	CurrencyHelper::setCurrency(string $currencyCode): void (CurrencyHelper.php:234)	Renamed.
J2Currency::format(float $number, string $currency='', mixed $value='', bool $format=true): string (currency.php:67)	CurrencyHelper::format(float $amount, ...): string (CurrencyHelper.php:524)	Same purpose; signature expanded with named args for decimals, symbol, etc.
J2Currency::convert(float $value, string $from, string $to): float (currency.php:120)	CurrencyHelper::convert(float $value, string $from, string $to): float (CurrencyHelper.php:596)	Identical.
J2Currency::getId(string $currency=''): int (currency.php:137)	CurrencyHelper::getId(string $currencyCode=''): int (CurrencyHelper.php:310)	Same.
J2Currency::getSymbol(string $currency=''): string (currency.php:148)	CurrencyHelper::getSymbol(string $currencyCode=''): string (CurrencyHelper.php:334)	Same.
J2Currency::getSymbolPosition(string $currency=''): string (currency.php:159)	CurrencyHelper::getSymbolPosition(string $currencyCode=''): string (CurrencyHelper.php:358)	Same.
J2Currency::getDecimalPlace(string $currency=''): int (currency.php:170)	CurrencyHelper::getDecimalPlace(string $currencyCode=''): int (CurrencyHelper.php:382)	Same.
J2Currency::getThousandSymbol(string $currency=''): string (currency.php:181)	CurrencyHelper::getThousandSymbol(string $currencyCode=''): string (CurrencyHelper.php:455)	Same.
J2Currency::getThousandSysmbol() (currency.php:192)	Removed	Typo variant removed. Use getThousandSymbol().
J2Currency::getCode(): string (currency.php:197)	CurrencyHelper::getCode(): string (CurrencyHelper.php:260)	Same.
J2Currency::getValue(string $currency=''): float (currency.php:202)	CurrencyHelper::getValue(string $currencyCode=''): float (CurrencyHelper.php:469)	Same.
J2Currency::has(string $currency): bool (currency.php:213)	CurrencyHelper::has(string $currencyCode): bool (CurrencyHelper.php:276)	Same.
J2Currency::getNumericCurrencies(): array (currency.php:218)	CurrencyHelper::getNumericCurrencies(): array (CurrencyHelper.php:798)	Same.
J2Currency::getCurrenciesNumericCode(string $code): mixed (currency.php:228)	CurrencyHelper::getCurrencyNumericCode(string $currencyCode): int (CurrencyHelper.php:819)	Renamed.
J2Currency::getNumericCode(): mixed (currency.php:243)	No direct equivalent	Use CurrencyHelper::getNumericCodes(): array (CurrencyHelper.php:623).

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Cart Helper

J2Store source: helpers/cart.php J2Commerce source: src/Helper/CartHelper.php

J2Store method (file:line)	J2Commerce equivalent (file:line)	Notes
J2Cart::getInstance(array $config=[]): J2Cart (cart.php:18)	CartHelper::getInstance(array $config=[]): self (CartHelper.php:76)	Singleton.
J2Cart::getSubtotal(array $items): float (cart.php:28)	CartHelper::getSubtotal(array $items): float (CartHelper.php:140)	Same.
J2Cart::getCartTaxTotal(array $items): float (cart.php:39)	CartHelper::getCartTaxTotal(array $items): float (CartHelper.php:166)	Same.
J2Cart::getTaxes(array $items): array (cart.php:52)	CartHelper::getTaxes(array $items): array (CartHelper.php:194)	Static method in both versions; $items now typed array.
J2Cart::getCartTotalWeight(array $items): float (cart.php:78)	CartHelper::getCartTotalWeight(array $items): float (CartHelper.php:241)	Same.
J2Cart::removeCartItem(int $cart_id): mixed (cart.php:92)	CartHelper::removeCartItem(int $cartId): bool (CartHelper.php:275)	Return type now bool.
J2Cart::getImage(string $type, int $product_id): string (cart.php:96)	CartHelper::getImage(string $type, int $productId): string (CartHelper.php:294)	Same.
J2Cart::resetCartTable($cart, $session_id, $user_id, $cart_type='cart') (cart.php:122)	CartHelper::resetCart(string $guestSessionId, int $userId): void (CartHelper.php:316)	Signature simplified; $cart and $cart_type args dropped.
J2Cart::emptyCart(int $order_id): mixed (cart.php:260)	CartHelper::emptyCart(string $orderId): bool (CartHelper.php:584)	PK type changed from int to string (J2C order PKs are varchar).
Not in J2S	CartHelper::getCart(int $cartId=0, bool $needCreateCart=true, string $cartType='cart'): ?object (CartHelper.php:839)	New in J2C — loads or creates a cart session.
Not in J2S	CartHelper::getCartItemCount(): int (CartHelper.php:766)	New in J2C.
Not in J2S	CartHelper::getCartTotal(): float (CartHelper.php:806)	New in J2C.
Not in J2S	CartHelper::isCartEmpty(): bool (CartHelper.php:820)	New in J2C.
Not in J2S	CartHelper::deleteCartItem(int $cartitemId): bool (CartHelper.php:493)	Replaces J2S removeCartItem for the explicit "delete" semantic.
Not in J2S	CartHelper::updateCartitemEntry(object $currentCart, object $existingCart): bool (CartHelper.php:425)	New in J2C.

---

Product Helper

J2Store source: helpers/product.php J2Commerce source: src/Helper/ProductHelper.php

J2Store method (file:line)	J2Commerce equivalent (file:line)	Notes
J2Product::getInstance(?array $props=null): J2Product (product.php:38)	ProductHelper::getInstance(?array $properties=null): ProductHelper (ProductHelper.php:133)	Singleton.
J2Product::setId(int $product_id): J2Product (product.php:124)	ProductHelper::setId(int $productId): ProductHelper (ProductHelper.php:263)	Fluent; same.
J2Product::getId(): int (product.php:129)	ProductHelper::getId(): ?int (ProductHelper.php:277)	Returns ?int in J2C.
J2Product::getProduct(): ?object (product.php:133)	ProductHelper::getProduct(): ?object (ProductHelper.php:292)	Same.
J2Product::exists(): bool (product.php:162)	ProductHelper::exists(): bool (ProductHelper.php:359)	Same.
J2Product::generateSKU(object $variant): string (product.php:167)	ProductHelper::generateSKU(object $variant, object $product): string (ProductHelper.php:1338)	Now static; requires $product arg.
J2Product::getProductOptions(object $product): array (product.php:227)	ProductHelper::getProductOptions(object $product): array (ProductHelper.php:1562)	Now static.
J2Product::getProductOptionValues(int $productoption_id, int $product_id): array (product.php:301)	ProductHelper::getProductOptionValues(int $productOptionId): array (ProductHelper.php:1668)	$product_id arg removed.
J2Product::getPrice(object $variant, int $quantity=1, string $group_id='', string $date=''): object|false (product.php:526)	ProductHelper::getPrice(object $variant, int $quantity=1, string $groupId='', string $date=''): object|false (ProductHelper.php:3257)	Parameter names camelCased.
J2Product::getOptionPrice(array $options, int $product_id): array (product.php:551)	ProductHelper::getOptionPrice(array $options, int $productId): array (ProductHelper.php:2015)	Now dispatches onJ2CommerceGetCustomOptionPrice for plugin-registered option types.
J2Product::displayPrice(mixed $price, object $product, ?Registry $params=null, string $context=''): string (product.php:669)	ProductHelper::displayPrice(float|string $price, ?object $product=null, ?Registry $params=null, string $context=''): string (ProductHelper.php:3692)	Same.
J2Product::displayQuantity(string $context, object $product, ?object $params=null, array $options=[]): string (product.php:711)	ProductHelper::displayQuantity(string $context, object $product, ?object $params=null, array $options=[]): string (ProductHelper.php:3722)	Same.
J2Product::check_stock_status(object $variant, int $quantity): bool (product.php:916)	ProductHelper::checkStockStatus(object $variant, int $quantity): bool (ProductHelper.php:2220)	Renamed camelCase. Instance alias check_stock_status also preserved (ProductHelper.php:3564).
J2Product::validateStock(object $variant, int $qty=1): bool (product.php:927)	ProductHelper::validateStock(object $variant, int $quantity=1): bool (ProductHelper.php:2239)	Now static.
J2Product::managing_stock(object $variant): bool (product.php:903)	ProductHelper::managingStock(object $variant): bool (ProductHelper.php:2171)	Renamed camelCase.
J2Product::getUpsells(object $source_product): array (product.php:1184)	ProductHelper::getUpsells(object $sourceProduct): array (ProductHelper.php:2568)	Now static.
J2Product::getCrossSells(object $source_product): array (product.php:1247)	ProductHelper::getCrossSells(object $sourceProduct): array (ProductHelper.php:2634)	Now static.
J2Product::displayImage(object $product, array $product_data): string (product.php:1319)	ProductHelper::displayImage(object $product, array $productData): string (ProductHelper.php:3908)	Same.
J2Product::canShowCart(Registry $params): bool (product.php:1372)	ProductHelper::canShowCart(Registry $params): bool (ProductHelper.php:2799)	Now static.
J2Product::canShowprice(Registry $params): bool (product.php:1386)	ProductHelper::canShowPrice(Registry $params): bool (ProductHelper.php:2823)	Renamed (uppercase P). Now static.
J2Product::canShowSku(Registry $params): bool (product.php:1395)	ProductHelper::canShowSku(Registry $params): bool (ProductHelper.php:2844)	Now static.
J2Product::getDefaultVariant(array $variants): ?object (product.php:1042)	ProductHelper::getDefaultVariant(array $variants): ?object (ProductHelper.php:1250)	Now static.
J2Product::displayStock(object $variant, Registry $params): string (product.php:861)	ProductHelper::displayStock(object $variant, Registry $params): string (ProductHelper.php:2294)	Now static.
J2Product::get_price_including_tax(float $price, int $taxprofile_id): float (product.php:761)	ProductHelper::get_price_including_tax(float $price, int $taxProfileId): float (ProductHelper.php:3822)	Instance method preserved.
J2Product::get_price_excluding_tax(float $price, int $taxprofile_id): float (product.php:801)	ProductHelper::get_price_excluding_tax(float $price, int $taxProfileId): float (ProductHelper.php:3848)	Instance method preserved.
J2Product::getJ2StoreBaseUrl(): string (product.php:1367)	ProductHelper::getBaseUrl(): string (ProductHelper.php:2781)	Renamed; returns Uri::base(true).
J2Product::validateFlexivariants(array $variants, array $options): bool (product.php:463)	ProductHelper::validateFlexivariants(array $variants, array $options): bool (ProductHelper.php:1923)	Now static.
J2Product::validateVariants(array $variants, array $options): bool (product.php:490)	ProductHelper::validateVariants(array $variants, array $options): bool (ProductHelper.php:1892)	Now static.

Before / After — Product Lookup

// J2Store v4
$product = J2Store::product()->setId(42)->getProduct();

if ($product) {
    $price = J2Store::product()->getPrice($product->variants[0], 1);
    $inStock = J2Store::product()->validateStock($product->variants[0], 1);
    echo J2Store::product()->displayPrice($price->price, $product, null, 'listing');
}

// J2Commerce 6
// File: plugins/j2commerce/app_example/src/Extension/AppExample.php
use J2Commerce\Component\J2commerce\Administrator\Helper\J2CommerceHelper;

$product = J2CommerceHelper::product()->setId(42)->getProduct(); // ProductHelper.php:292

if ($product) {
    $price   = J2CommerceHelper::product()->getPrice($product->variants[0], 1); // ProductHelper.php:3257
    $inStock = J2CommerceHelper::product()::validateStock($product->variants[0], 1); // ProductHelper.php:2239
    echo J2CommerceHelper::product()->displayPrice($price->price, $product, null, 'listing'); // ProductHelper.php:3692
}

---

Table and Model Access

J2Store source: helpers/fof.php:9 (wraps F0FTable / F0FModel)

J2Store pattern (file:line)	J2Commerce 6 equivalent	Notes
J2Store::fof()->loadTable('Order', 'J2StoreTable'): F0FTable (fof.php:44)	Factory::getApplication()->bootComponent('com_j2commerce')->getMVCFactory()->createTable('Order', 'Administrator'): Table	Returns namespaced J2C Table subclass.
J2Store::fof()->getModel('Orders', 'J2StoreModel'): F0FModel (fof.php:60)	Factory::getApplication()->bootComponent('com_j2commerce')->getMVCFactory()->createModel('Orders', 'Administrator', ['ignore_request' => true]): Model	['ignore_request' => true] is required to prevent URL state contamination.
F0FTable::getAnInstance($type, $prefix)	$mvcFactory->createTable(string $name, string $prefix='Administrator', array $config=[]): Table	Direct FOF static call replaced.
F0FModel::getTmpInstance($type, $prefix) (fof.php:65)	$mvcFactory->createModel(string $name, string $prefix='Administrator', array $config=['ignore_request'=>true]): Model	getTmpInstance creates a fresh unregistered instance — createModel with ['ignore_request'=>true] is the equivalent.
$table->load(array $params)	$table->load(int|array $keys)	Same Joomla Table::load().
$table->store()	$table->store()	Same.
$table->bind($data)	$table->bind($data)	Same.
$table->check()	$table->check()	J2C Table constructors must call $this->setColumnAlias('published', 'enabled').
$table->delete($pk)	$table->delete($pk)	Same.
J2Store::fof()->loadTableFilePath() (fof.php:21)	No equivalent	PSR-4 autoloading replaces addIncludePath.
J2Store::fof()->loadModelFilePath() (fof.php:30)	No equivalent	Same.
Update order status: $order->order_state_id = X; $order->store()	$orderModel->updateOrderStatus(int $orderId, int $newStatusId, bool $notify=false, string $comment=''): bool (OrderModel.php:558)	CRITICAL: Always use updateOrderStatus() — never raw SQL. It fires events, creates history, and optionally sends an email notification.

---

Routing Helper

J2Store source: helpers/router.php:13 J2Commerce source: components/com_j2commerce/src/Helper/RouteHelper.php:52

J2Store function (file:line)	J2Commerce equivalent (file:line)	Notes
J2StoreRouterHelper::findMenu(array $qoptions, $params=null) (router.php:42)	No direct equivalent — RouterHelper::findMenu() (RouterHelper.php:175) is internal to the Router	Not a public API in J2C. Pass parameters directly to the appropriate RouteHelper::get*Route() method.
J2StoreRouterHelper::getAndPop() (router.php — internal)	RouterHelper::getAndPop() (RouterHelper.php:119)	Internal Router utility. Not intended as a public API.
J2StoreRouterHelper::findProductMenu(array $qoptions) (router.php:260)	No direct equivalent	Handled internally by the Router.
J2StorePlatform::getProductUrl(array $params, bool $is_tag_view=false) (platform.php:300)	Route::_(RouteHelper::getProductRoute(int $id, ?string $alias, ?int $catid, ...): string) (RouteHelper.php:52)	Platform URL method replaced by RouteHelper.
J2StorePlatform::getCartUrl(array $params=[]) (platform.php:286)	Route::_(RouteHelper::getCartRoute(?string $task=null): string) (RouteHelper.php:271)
J2StorePlatform::getCheckoutUrl(array $params=[]) (platform.php:249)	Route::_(RouteHelper::getCheckoutRoute(?string $step=null): string) (RouteHelper.php:338)
J2StorePlatform::getMyprofileUrl(array $params, bool $is_xml, bool $no_sef) (platform.php:228)	Route::_(RouteHelper::getMyProfileRoute(?string $layout=null): string) (RouteHelper.php:388)
J2StoreRouterHelper::findMenuOrders(array $qoptions) (router.php:140)	Route::_(RouteHelper::getOrderRoute(int $orderId): string) (RouteHelper.php:413)
J2StoreRouterHelper::findThankyouPageMenu(array $qoptions) (router.php:208)	Route::_(RouteHelper::getThankYouRoute(?int $orderId=null): string) (RouteHelper.php:363)
J2StoreRouterHelper::findMenuCarts(array $qoptions) (router.php:226)	Route::_(RouteHelper::getCartRoute()) (RouteHelper.php:271)
J2StoreRouterHelper::findProductTagsMenu(array $qoptions) (router.php:296)	Route::_(RouteHelper::getProductTagsRoute(?int $tagId=null)) (RouteHelper.php:246)
J2StoreRouterHelper::getProductCategory(int $id, string $lang='') (router.php:410)	No direct equivalent	Pass $catid directly to RouteHelper::getProductRoute().
J2StoreRouterHelper::getItemAlias(int $id, string $lang='') (router.php:437)	No direct equivalent	Pass $alias directly to RouteHelper::getProductRoute().
Not in J2S	RouteHelper::getProductsRoute(?int $catid=null): string (RouteHelper.php:86)	New in J2C.
Not in J2S	RouteHelper::getAddToCartRoute(int $productId): string (RouteHelper.php:297)	New in J2C.
Not in J2S	RouteHelper::getRemoveFromCartRoute(int $cartItemId): string (RouteHelper.php:311)	New in J2C.
Not in J2S	RouteHelper::getClearCartRoute(): string (RouteHelper.php:323)	New in J2C.
Not in J2S	RouteHelper::getDashboardRoute(): string (RouteHelper.php:433)	New in J2C.
Not in J2S	RouteHelper::getContinueShoppingRoute(): string (RouteHelper.php:455)	New in J2C.

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No Direct Equivalent / Pattern Changed

These J2Store patterns have no 1:1 equivalent in J2Commerce 6. Each requires a structural change.

J2Store concept	J2Commerce 6 pattern / explanation
J2Store::fof() / J2F0F class (fof.php:9)	Completely removed. Use Factory::getApplication()->bootComponent('com_j2commerce')->getMVCFactory()->createTable() / createModel().
F0FTable::getAnInstance()	$mvcFactory->createTable('Name', 'Administrator')
F0FModel::getTmpInstance()	$mvcFactory->createModel('Name', 'Administrator', ['ignore_request' => true])
FOF table prefix J2StoreTable	Namespace J2Commerce\Component\J2commerce\Administrator\Table
FOF model prefix J2StoreModel	Namespace J2Commerce\Component\J2commerce\Administrator\Model
JFactory::getDbo()	$this->getDatabase() (with DatabaseAwareTrait) or Factory::getContainer()->get(DatabaseInterface::class)
JFactory::getApplication()	Factory::getApplication()
JFactory::getUser()	Factory::getApplication()->getIdentity() (current user)
JFactory::getUser($id)	UserHelper::getUserById(int $userId) (UserHelper.php:761)
JFactory::getDate()	Factory::getDate() (still valid)
JRoute::_($url)	Route::_($url) (Joomla\CMS\Router\Route)
JText::_('KEY')	Text::_('KEY') (Joomla\CMS\Language\Text)
JComponentHelper::getParams('com_j2store')	ComponentHelper::getParams('com_j2commerce')
Plugin group j2store / j2storepayment / j2storeshipping / j2storeapps / j2storereports	Plugin group j2commerce for all — elements prefixed payment_*, shipping_*, app_*, report_*
Event return: return $value; in handler	$event->addResult($value) — no return value
Event prefix onJ2Store*	Event prefix onJ2Commerce*
J2StorePlatform::getProductUrl() / getCartUrl() / getCheckoutUrl() / getMyprofileUrl()	RouteHelper::getProductRoute() / getCartRoute() / getCheckoutRoute() / getMyProfileRoute() wrapped in Route::_()
J2StorePlatform::application()	Factory::getApplication()
J2StorePlatform::raiseError($code, $msg)	throw new \RuntimeException($msg, $code)
J2StorePlatform::getRegistry($json)	new Registry($json)
J2StorePlatform::getImagePath($path)	ImageHelper::getImageUrl(string $imagePath) (via J2CommerceHelper::image())
J2Store::getSelectableBase() / J2Store::getSelectableFields()	No equivalent. Selectable fields concept removed.
J2Store::help() / J2Help class	J2CommerceHelper::buildHelpLink($url, $content) (J2CommerceHelper.php:834) — static method, no class.
#__j2store_* table names	#__j2commerce_* table names
PK column j2store_xxx_id	PK column j2commerce_xxx_id
published column	enabled column + $this->setColumnAlias('published', 'enabled') in every Table constructor
DB raw $db->q() / $db->qn()	$db->quote() / $db->quoteName() + parameterized ->bind(':param', $val, ParameterType::INTEGER)
$query->where('id = ' . $id) raw concat	->where($db->quoteName('id') . ' = :id')->bind(':id', $id, ParameterType::INTEGER)
JRequest::getVar(…)	Factory::getApplication()->getInput()->get(…)
jquery / $.ajax	fetch() + async/await
J2S plugin inheritance: class plgJ2storePaymentXxx extends JPlugin	final class PaymentXxx extends CMSPlugin implements SubscriberInterface + services/provider.php
$this->_element in J2S plugin	$this->_name in J2C plugin (CMSPlugin has no _element property)
COM_J2STORE_* language keys	COM_J2COMMERCE_*
PLG_J2STORE_* language keys	PLG_J2COMMERCE_*
J2STORE_* custom field label keys	J2COMMERCE_*

---

Namespace Reference

Use these namespaces when building J2Commerce 6 extensions.

Extension type	Namespace pattern	Example
Admin Controller	J2Commerce\Component\J2commerce\Administrator\Controller	class PaymentController extends FormController
Admin Model	J2Commerce\Component\J2commerce\Administrator\Model	class OrderModel extends AdminModel
Admin Table	J2Commerce\Component\J2commerce\Administrator\Table	class OrderTable extends Table
Admin Helper	J2Commerce\Component\J2commerce\Administrator\Helper	J2CommerceHelper::config()
Site Model	J2Commerce\Component\J2commerce\Site\Model	class ProductModel extends BaseModel
Site Helper	J2Commerce\Component\J2commerce\Site\Helper	RouteHelper::getProductRoute()
Payment Plugin	J2Commerce\Plugin\J2Commerce\Payment[Name]\Extension	class PaymentStripe extends CMSPlugin
Shipping Plugin	J2Commerce\Plugin\J2Commerce\Shipping[Name]\Extension	class ShippingAtoship extends CMSPlugin
App Plugin	J2Commerce\Plugin\J2Commerce\App[Name]\Extension	class AppGiftWrapping extends CMSPlugin
Report Plugin	J2Commerce\Plugin\J2Commerce\Report[Name]\Extension	class ReportItemised extends CMSPlugin

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Related

• Database Schema Reference
• API Reference