Don't create Set for one-to-many

rapthor · **Joined:** Wed Nov 01, 2006 2:17 pm **Posts:** 78

Hello,

I have a problem using Hibernate Tools for reverse engineering. The one-side of a one-to-many-relation should not have a "Set<ManySideType>" inside.

Every entityA class that is generated has a Set of entitiyB that reference entityA. Have a look at these example tables:

Code:

---------------------------
Person
id    name     fk_car_id
---------------------------

---------------------------
Car
id    name
---------------------------

My Person entity hast an attribute "Car car;" that is exactly what I want. But on the other side the Car entity has a "Set<Person> person" in that case I don't want the Set inside.

How do I tell Hibernate Tools to leave out the Sets of the one-side in a one-to-many-relation?

Overwriting (one of) the following methods in the ReverseEngineeringStrategy doesn't help. This has side effects:

Code:

   @Override
                      // removes ALL Sets
   public boolean excludeForeignKeyAsCollection(String arg0, TableIdentifier arg1, List arg2, TableIdentifier arg3, List arg4) {
      return super.excludeForeignKeyAsCollection(arg0, arg1, arg2, arg3, arg4);
   }
   
   @Override
                    // doesn't work either
   public boolean excludeForeignKeyAsManytoOne(String arg0, TableIdentifier arg1, List arg2, TableIdentifier arg3, List arg4) {
      return super.excludeForeignKeyAsManytoOne(arg0, arg1, arg2, arg3, arg4);
   }

The most improtant part of my ant-build (I am using a template as well):

Code:

           <jdbcconfiguration configurationfile="${src}/hibernate.cfg.xml"
            reversestrategy="org.revengstrategy.MyReverseEngineeringStrategy"
              revengfile="${buildconfig}/hibernate.reveng.xml"
              packagename= "org.entity"/>

         <!-- Generate entities -->
            <hbmtemplate 
                templateprefix="" 
               filepattern="../entity/{class-name}.java" 
               templatepath="${templatepath}/entity" 
               template="Pojo.ftl"  > 
               <property key="jdk5" value="true" />
               <property key="ejb3" value="false" />
            </hbmtemplate>

rapthor · **Joined:** Wed Nov 01, 2006 2:17 pm **Posts:** 78

This does not work either ... although I would strongly expect this to work:

Code:

   @Override
   public boolean excludeForeignKeyAsCollection(String arg0, TableIdentifier arg1, List arg2, TableIdentifier arg3, List arg4) {
      return isForeignKeyCollectionInverse(arg0,arg1,arg2,arg3,arg4);
   }

The collection in the Car class would be inverse, it is excluded, but every other Set is excluded as well?!

max · **Posted:** Fri Jun 22, 2007 3:25 pm

why don't you just return true ?