How to tune JPAMetaModelEntityProcessor so it doesn't get "Duplicate class" error?

I am trying to use hibernate-jpamodelgen in conjunction with the maven-processor-plugin to create my JPA meta model as part of my Maven build using the configuration from this answer .

However, when I do the build, I get the following error when I try to do mvn clean install

:

[ERROR] C:\Users\ArtB\Documents\code\xxx\target\classes\me\Page_.java:[11,16] error: duplicate class: me.Page_  

      

        
        
        
      

    

From some research, it looks like the problem is that the generated metamodel seems to happen twice or something.

If I run clear; mvn clean generate-sources; ls -l target\generated-sources\apt\me

, I only have the file _Page.java

and no other files.

After the phase, the compile

folder target\classes\

just contains \me\_Page.java

... which seems odd since I thought the files .class

should appear in the "\ target \ classes" folder.

I ran the build with debug (i.e. -X

) and saw nothing suspicious.

I doubt this is important, but here are my models.

package me;

@Entity
@Table(name="Pages")
public class Page {

    @Id @GeneratedValue
    private long id;

    private String title;
    private Instant lastRetrieved;
    private PageCategory category;
    private URL source;

    @Lob
    private String contents;

    //hashcode, equals, getters & setters omitted
}

      

        
        
        
      

    

and

package me;

public enum PageCategory {
    PRODUCT,
    INFO
    ;
}