JPA Hibernate Metamodel generation through maven

Question

I followed the JPA modelgen guide and i was able to generate the canonical metamodel which i need. With this pom set up:

Answer 1

I'm also using JPA Metamodel generator and I don't have the problems you describe, maybe my configuration can help, I see some differences, the first one is maven-processor-plugin

  org.bsc.maven
  maven-processor-plugin
  2.1.0
  
    
      process
      
        process
      
      generate-sources
      
        
          org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor
        
      
    
  
  
    
      org.hibernate
      hibernate-jpamodelgen
      
      4.3.4.Final
    
  

As you can see I had to add hibernate-jpamodelgen as dependency and the processor attribute.

I am not sure if build-helper-maven-plugin is necessary to add the directory of generated sources to your source path. I am not using it and it works for me but maybe it's because I am using the default output path for generated sources.