The compiler checks to ensure implementations adhere to assigned interfaces.Ī great post that describes interfaces in AL was written by Tobias Fenster some weeks ago and you can find it here.Īs I’ve described in my previous post, Microsoft is using the interface object in the new version 16 codebase on different places and the first place that comes to my eyes when building my apps for version 16 was on the sales price calculation module.ĭynamics 365 Business Central 2020 Wave 1 (or version 16) has a totally new way of handling sales prices based on AL Interfaces. The interface object itself does not contain any code, only signatures, and cannot itself be called from code, but must be implemented by other objects.

With the new AL language version, you can use the new interface object to declare an interface name along with its methods, and apply the implements keyword along with the interface names on objects that implement the interface methods.

This allows for writing code that reduces the dependency on implementation details, makes it easier to reuse code, and supports a polymorphing way of calling object methods, which again can be used for substituting business logic. The upcoming Dynamics 365 Business Central 2020 Wave 1 release (version 16) introduces the concept of Interfaces in AL.Īn interface is used when you want to decide which capabilities need to be available for an object, while allowing actual implementations to differ, as long as they comply with the defined interface.

365 business central pricing