MapStruct
A Java compiler plugin (IDE independent)
MapStruct is a new way of mapping data that generates Java code at compilation time. It’s easy to debug, has no run time dependencies, is type safe and doesn’t use reflection.
The mapping between different data models is a common but unpleasant task for developers, e.g. when propagating data from an internal domain model to the elements of a REST facade, UI layer or external web service.
Writing conversion code by hand is tedious and error-prone, while reflection-based solutions suffer from poor performance and the lack of type-safety. MapStruct takes a fresh look at the issue and generates mapping code at compile time, based on Java interface definitions. The resulting code is type-safe and super-fast, has no dependencies and is easy to understand (and debug, if ever needed). Providing many type conversions out of the box, MapStruct also allows you to customize and amend mappings as needed.
Get smart with MapStruct by Filip Hrisafov
MapStruct = mapping between models
Implement mappings = boilerplate MapStruct generates & configure implementation
MapStruct auto generates DTO’s
Remeber what a DTO is, this is the moment that it comes together…
Mapstruct, like Lombok, provides code generation for us in compile time, (you can compile with Maven)
Advantages of code generation:
- Type safe
- Quick feedback loop
- Easy to debug
- Plain Method Calls -> very fast
- No runtime dependencies
- Works on CLI or IDE
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