If you already know what you’re looking for and don’t want to browse through thousands of sneakers, you can limit your selection further by refining on, for example only red sneakers or sneakers within the price range of 25-100 euros. On a list page, you can optionally select a category, such as sneakers, to only display casual, sporty shoes. A list page is a list of products you can browse through. If you have ever visited our webshop, you probably know what a list page is. Throughout the rest of this blog, we use an example domain object model to represent the selection a user has made on a list page. A whirlwind introduction to our problem domain However, first we provide you with a whirlwind introduction to our problem domain because we like to have our examples a bit more realistic than Foo and Bar. how to create mappers that map multiple source objects onto one target object, in case one of those sources can be null.įor each case, we explain which issues you might run into, and of course, how to overcome them.how to write mappers for Java optionals, and.This blog zooms in on MapStruct’s capabilities of dealing with source fields that are not always present, i.e. If, after reading this, you still wonder what MapStruct is and what it can do for you, then this blog could answer those questions for you.

In this blog we show you how to map optional fields with MapStruct. MapStruct is a framework that alleviates us, programmers, from the unexciting task of writing code to copy one object model to another, field by field.

Kotlin map not null