[hibernate-issues] [Hibernate-JIRA] Resolved: (METAGEN-35) Generated meta model classes does not extend the super class' meta model.

Generated meta model classes does not extend the super class' meta model. ------------------------------------------------------------------------- Key: METAGEN-35 URL: http://opensource.atlassian.com/projects/hibernate/browse/METAGEN-35 Project: Hibernate Metamodel Generator Issue Type: Bug Components: processor Affects Versions: 1.0.0.Final Environment: Maven 2.2.1, Hibernate 3.5.4, maven-processor-plugin 13.6 Reporter: Joel Ringuette Assignee: Hardy Ferentschik Fix For: 1.1.0 I'm currently using maven to build a project. I'm using org.bsc.maven.maven-processor-plugin plugin to generate the meta model. In my main source folder, I have a class annotated with @MappedSuperclass. {code} @MappedSuperclass public abstract class BaseEntity { // Entity id @Id @GeneratedValue private Long id; // some more code } {code} In my test source folder, I have a class extending BaseEntity annotated with @Entity {code} @Entity() public class Book extends BaseEntity { private String name; @Column(unique = true) private String isbn; @ManyToOne(optional = false) private Author author; // some more code } {code} When generating the meta model, the BaseEntity will generate BaseEntity_ and Book will generate Book_. The problem is that Book_ does not extend BaseEntity_ Here is my config of the plugin {code:xml} <plugin> <groupId>org.bsc.maven</groupId> <artifactId>maven-processor-plugin</artifactId> <version>1.3.6</version> <executions> <execution> <id>process</id> <goals> <goal>process</goal> </goals> <phase>generate-sources</phase> <configuration> <!-- source output directory --> <outputDirectory>${project.build.sourceDirectory}</outputDirectory> </configuration> </execution> <execution> <id>process-test</id> <goals> <goal>process-test</goal> </goals> <phase>generate-test-sources</phase> <configuration> <!-- source output directory --> <outputDirectory>${project.build.testSourceDirectory}</outputDirectory> <compilerArguments>-Adebug=true</compilerArguments> </configuration> </execution> </executions> <dependencies> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-jpamodelgen</artifactId> <version>1.0.0.Final-Genia</version> <scope>compile</scope> </dependency> </dependencies> </plugin> {code} After looking at the code, the culprit seem to be org.hibernate.jpamodelgen.ClassWriter. In the method printClassDeclaration, we can see the following code: {code} if ( context.containsMetaEntity( superClassName ) || context.containsMetaEmbeddable( superClassName ) ) { pw.print( " extends " + superClassName + "_" ); } {code} It assume the the super class meta model is generated at the same time as the extending class, which is not the case for test-compile and compile. I also assume that it does not work if you extend a class coming from a jar where the meta model was already generated. To locally fix the problem, I changed the above code for: {code} if (((TypeElement) superClassElement).getAnnotation(Entity.class) != null || ((TypeElement) superClassElement).getAnnotation(MappedSuperclass.class) != null) { pw.print(" extends " + superClassName + "_"); } {code} Since it's the first time I use annotation for code generation, I may not have fully understood the problem so feel free to correct me if the above fix is not the correct solution. Regard, Joel