Mapstruct together with other annotation-processors in maven-pom

Question

http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4.0.0

<artifactId>yyy-data</artifactId>
<name>VS yyy (data)</name>

<parent>
    <groupId>de.xxx</groupId>
    <artifactId>yyy-server</artifactId>
    <version>8.1.0-SNAPSHOT</version>
</parent>
<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <distribution.outputDirectory>${project.build.directory}/dist</distribution.outputDirectory>
</properties>

<dependencies>

    <dependency>
        <groupId>com.mysema.querydsl</groupId>
        <artifactId>querydsl-apt</artifactId>
    </dependency>
    <dependency>
        <groupId>com.mysema.querydsl</groupId>
        <artifactId>querydsl-jpa</artifactId>
    </dependency>

    <dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.2.8</version>
    </dependency>
    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-core</artifactId>
        <version>2.2.8-b01</version>
    </dependency>
    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-impl</artifactId>
        <version>2.2.8-b01</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.mapstruct</groupId>
        <artifactId>mapstruct</artifactId>
        <version>1.3.0.Final</version>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <annotationProcessorPaths>
                    <path>
                        <groupId>org.mapstruct</groupId>
                        <artifactId>mapstruct-processor</artifactId>
                        <version>1.3.0.Final</version>
                    </path>
                </annotationProcessorPaths>
                <annotationProcessors>
                    <annotationProcessor>de.zzz.annotation.processor.GenerateHibernateTypeForEnumProcessor</annotationProcessor>
                    <annotationProcessor>de.zzz.annotation.processor.GenerateHibernateTypeForWertelistenProcessor</annotationProcessor>
                    <annotationProcessor>de.zzz.annotation.processor.BusinessObjectAnnotationProcessor</annotationProcessor>
                    <annotationProcessor>com.mysema.query.apt.jpa.JPAAnnotationProcessor</annotationProcessor>
                </annotationProcessors>
            </configuration>
            <executions>
                <execution>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>compile</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

<profiles>
    <profile>
        <id>m2e</id>
        <activation>
            <property>
                <name>m2e.version</name>
            </property>
        </activation>
        <build>
            <plugins>
                <plugin> 
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <executions>
                        <execution>
                            <goals>
                                <goal>compile</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </profile>
</profiles>

Dear all,

I need some help in implementing mapstruct in my project. I already have some annotation processors which need to be named in the pom.xml of maven. Mapstruct recommends to add annotationProcessorPaths in the pom.xml. It seems that it is not possible to use both annotations (annotationProcessorPaths and annotationProcessor) in the same pom. If I do, I get the error

Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.0:compile (default) on project yyy-data: Compilation failure [ERROR] Annotation processor 'de.zzz.annotation.processor.GenerateHibernateTypeForEnumProcessor' not found

I did shorten the pom. So there may be more dependencies than really needed.

Thanks in advance Oliver

Answer 1

You can still use annotationProcessor. You would need to add the mapstruct-processor in your dependencies and then add org.mapstruct.ap.MappingProcessor in the annotationProcessor.

The reason why you are seeing the error is because when you define annotationProcessorPaths the maven-compiler-plugin will only use those for looking for annotation processors and not your other dependencies.

Alternatively you can also add all the annotation processors you have in the annotationProcessoPaths instead if your dependencies.