Static metamodel class is not generated

Question

I just started learning and using Jhipster. I have a question about JPA Static metamodel generation. The following is what I have done according to the Jhipster website but the static matemodel class(Class X_) is not generated:

I created an entity called: SalesByDepartment. After this entity generated, I changed its JOSN file from folder:.jhipster under my project folder by setting service to serviceImpl from no, and jpaMetamodelFiltering to true. My understanding is that I need to re-run entity sub-generator to regenerate the same entity to enable Filtering feature after I've done this change to this entity's JSON file. However, I only can find 'SalesByDepartmentCriteria' and 'SalesByDepartmentQueryService'. There is no class 'SalesByDepartment_' under the domain package. I also checked pom.xml and I can find the plugin:

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>${maven-compiler-plugin.version}</version>
            <configuration>
                <annotationProcessorPaths>
                    <path>
                        <groupId>org.mapstruct</groupId>
                        <artifactId>mapstruct-processor</artifactId>
                        <version>${mapstruct.version}</version>
                    </path>
                    <!-- For JPA static metamodel generation -->
                    <path>
                        <groupId>org.hibernate</groupId>
                        <artifactId>hibernate-jpamodelgen</artifactId>
                        <version>${hibernate.version}</version>
                    </path>

                </annotationProcessorPaths>
            </configuration>
        </plugin>

May I know if anything else I have missed to generate 'SalesByDepartment_' under domain package?

Thank you for the help.

By the way, it worked fine when I generated the first project. I did the same way and static metamodel classes were created automatically under project folder: 'com.xxx.domain'. I also can find them under target folder after build process with Maven. I guess there are something wrong but still have no idea why is that. Below is the screen shot for two projects that I have created using 'jhipster'. A is the previous project which I could generate static metamodel, but B doesn't work: enter image description here

Answer 1

JPA Static metamodel is generated by build process (maven or gradle) as explained in JHipster doc so you just have to build your app and you'll find SalesByDepartment_.java under target for maven and under build for gradle.

Answer 2

I had this problem too, the best way that I found for myself - add the dependency to maven and to annotation processor path

    <dependencies>
         ...
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-jpamodelgen</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
    </dependencies>

annotation processor

 <build>
    <plugins>
        ...
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>11</source>
                <target>11</target>
                <annotationProcessorPaths>
                    <path>
                        <groupId>org.hibernate</groupId>
                        <artifactId>hibernate-jpamodelgen</artifactId>
                        <version>${hibernate.version}</version>
                    </path>
                    ...
                </annotationProcessorPaths>
            </configuration>
        </plugin>
    </plugins>
</build>

Hope it helps somebody )

Answer 3

In my case the problem was a problem in services that the compiler don't notice.

I change a service class from implemented service to service so the implementation class was still existing, i erase that file an everything works fine.