Class HookMgr

dw.system

Class HookMgr

dw.system.HookMgr

This class provides functionality to call hooks. A hook is an extension point in the business logic, where you can register scripts to customize functionality.

This class does not have a constructor, so you cannot create it directly.

static callHook(extensionPoint : String, function : String, args : Object...) : Object

Calls a hook on base of the specified extensionPoint and function.

static hasHook(extensionPoint : String) : boolean

Checks whether a hook is registered or a system default implementation exists for this extension point.

Methods inherited from class Object

assign, create, create, defineProperties, defineProperty, entries, freeze, fromEntries, getOwnPropertyDescriptor, getOwnPropertyNames, getOwnPropertySymbols, getPrototypeOf, hasOwnProperty, is, isExtensible, isFrozen, isPrototypeOf, isSealed, keys, preventExtensions, propertyIsEnumerable, seal, setPrototypeOf, toLocaleString, toString, valueOf, values

callHook

static callHook(extensionPoint : String, function : String, args : Object...) : Object

Calls a hook on base of the specified extensionPoint and function. If a hook throws an exception, then this method will also throw an exception. If no hook and no system default implementation is provided, then this method will return undefined.

Sample:

 dw.system.HookMgr.callHook( "dw.order.calculate", "calculate", basket );

Parameters:

extensionPoint - the extension point to call

function - the script function to call

args - the Array of function parameters

Returns:

the object returned by the hook or undefined

hasHook

static hasHook(extensionPoint : String) : boolean

Checks whether a hook is registered or a system default implementation exists for this extension point.

extensionPoint refers to the same name used to register a script as implementation. With this method it's only possible to check for a whole script registered but it is not possible to check, whether an individual function is implemented.

Sample:

 dw.system.HookMgr.hasHook( "dw.order.calculate" );

Parameters:

extensionPoint - the extension point

Returns:

true, if a hook is registered or a default implementation exists, otherwise false