Reverse ingeneering, cascade strategy

ahuut · **Joined:** Mon Jul 30, 2007 1:59 pm **Posts:** 6

Hi,

I use Hibernate Tools in reverse ingeneering to generate my annotated Pojo from a MySQL database. I would like to change the cascade elements, Hibernate Tools generates :

Code:

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "INT_IDENTIFIANT", unique = true, nullable = false, insertable = false, updatable = false)
    public Affaire getAffaire() {
        return this.affaire;
    }

but I would like to have :

Code:

    @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
    @JoinColumn(name = "INT_IDENTIFIANT", unique = true, nullable = false, insertable = false, updatable = false)
    public Affaire getAffaire() {
        return this.affaire;
    }

How can I for Hibernate Tools to generate the cascade element, the only solution I found is to add ant Ant task with regular expressions but if I can avoid it ;) ? I looked about the "columnToMetaAttributes" method from DelegatingReverseEngineeringStrategy but I didn't find documentation about, it seems there is no MetaAttribute about this kind of annotation.

Thanks,
Jean-Claude

max · **Posted:** Wed Nov 19, 2008 7:09 am

we don't have a good way to fine grain control the cascade's.

Look in reveng.xml docs on which options we can control.

trinicc · **Joined:** Wed Feb 04, 2009 4:33 am **Posts:** 1

This is the solution I use:

I changed the file Ejb3PropertyGetAnnotation.ftl of hibernateTools. I added
the line "@org.hibernate.annotations.Cascade
({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.MERGE})" and "${property.setCascade("MERGE")}"
to generate the cascade element:

Code:

...
<#if c2h.isManyToOne(property)>
<#--TODO support @OneToOne true and false-->    
${pojo.generateManyToOneAnnotation(property)}
@org.hibernate.annotations.Cascade 
({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.MERGE})
<#--TODO support optional and targetEntity-->    
${pojo.generateJoinColumnsAnnotation(property, cfg)}
<#elseif c2h.isCollection(property)>
${property.setCascade("MERGE")}
${pojo.generateCollectionAnnotation(property, cfg)}
<#else>
${pojo.generateBasicAnnotation(property)}
${pojo.generateAnnColumnAnnotation(property)}
</#if>
...

This is an example of the code that hibernateTools generates with the changes I've made:

Code:

   @ManyToOne(fetch = FetchType.LAZY)
   @org.hibernate.annotations.Cascade( {
         org.hibernate.annotations.CascadeType.SAVE_UPDATE,
         org.hibernate.annotations.CascadeType.MERGE })
   @JoinColumn(name = "ALLERGEN_TYPE_CODE_FK")
   public Cat0127AllergyType getCat0127AllergyType() {
      return this.cat0127AllergyType;
   }
...

   @OneToMany(cascade = CascadeType.MERGE, fetch = FetchType.LAZY, mappedBy = "segAl1")
   public Set<SegRelAl1> getSegRelAl1s() {
      return this.segRelAl1s;
   }