We have to use the @ Named annotation with the value parameter to inform MapStruct about the custom mapper method: @Mapper public interface UserBodyValuesMapper { @Named ("inchToCentimeter") public static double inchToCentimeter(int inch) { return inch * 2.54 ; } //. } mapstruct: Mapping composition | gitmotion.com Mapping DTOs in Spring Boot with MapStruct - Masterspringboot MapStruct is a slick project which generates type mappers via simple interfaces. And MapStruct generates the implementation of the mapper. Project Lombok is an annotation processor that (amongst other things) adds getters and setters to the AST (abstract syntax tree) of compiled bean classes. MapStruct makes some assumption while generating code for mapper. The base class gets built and returned from a Assembly that references AssemblyA, to AssemblyB, which does not know anything about AssemblyA. Best Java code snippets using org.mapstruct.Mappings (Showing top 15 results out of 315) org.mapstruct Mappings. . MapStruct Dependencies One simple way to give access to the default implementation is to have that default class in the mapstruct.spi artifact so users can just extend if desired. A plug-in replacement for JDK1.5 java.util.Hashtable. MapStruct and Project Lombok are two tools which can make your life as a developer much easier. Kind regards, Michael . Frequently Asked Questions (FAQ) - MapStruct Perhaps we can add an InheritConfiguration option to inherit configs from a different type (e.g. By default, properties are mapped if they have the same name in source and target, but this and many other aspects can be controlled using @Mapping and a . MapStruct doesn't know how to map to abstract class, because it cannot instantiate it. MapStruct generic Map and map combined types list of children objects Guide to MapStruct in Java - Advanced Mapping Library Safe Domain Objects with MapStruct and Immutables - DEV How to map extended classes in MapStruct - Stack Overflow MapStruct - Java bean mappings, the easy way! Java Object Mapper with MapStruct - Rishabh Jain's Corner It uses annotation-processing to generate mapper class implementations during compilation and greatly reduces the amount of boilerplate code which would regularly be written by hand. MapStruct 1.2 can therefore automatically create nested mapping methods: @Mapper public class OrderMapper { @Mapping(target = "customer.name", source . You define an interface method to accept a source type with a return type. You have 2 ways to achieve this: Using Mapping#expression I am using java 8 and mapstruct 1.2.0. Mapper using generics · Issue #2690 · mapstruct/mapstruct · GitHub Frequently Asked Questions (FAQ) - MapStruct How to map extended DTO's from same source class. The result is very impressive and it is in milliseconds.