Map Cascade delete

AparnaR · **Joined:** Mon Feb 02, 2009 4:55 am **Posts:** 5

In an entity i have a map<object1, object2> when object2 is deleted, the associations get deleted. In my case, along with the association, object2 should also get deleted.

Code:

private Entity entityName{ 
   @CollectionOfElements(targetElement = object2.class) 
      @MapKeyManyToMany(targetEntity = object1.class) 
   @Cascade({CascadeType.ALL, CascadeType.DELETE_ORPHAN}) 
   private Map<object1, object2> map1; 
} 
 

littypreethkr · **Posted:** Fri Feb 20, 2009 9:15 am

Then how come this is a many to many relation. Coz if you delete from DB the object2 when one object1-object2 relation is removed then there could be other object1s refering to this object2. What will happen to them?

AparnaR · **Joined:** Mon Feb 02, 2009 4:55 am **Posts:** 5

littypreethkr wrote:

Then how come this is a many to many relation. Coz if you delete from DB the object2 when one object1-object2 relation is removed then there could be other object1s refering to this object2. What will happen to them?

object2 will be unique for each key in the map. so it must be deleted. Object2 is not master data - it is a subset of another table (based on a condition satisfied)

littypreethkr · **Posted:** Mon Feb 23, 2009 1:48 am

Sorry, but I think I didn't quite understand ur problem. Can you elaborate a bit more on it, may be with an example.