[jboss-user] [Beginner's Corner] - Re: ManyToMany problem

[swenu]

Hi again :D

i found a solution - at least i'm close to a solution.

I added this function to the Role.

  | @OneToMany(mappedBy="role")
  | private List<RoleFunction> listRoleFunctions;
  | ...
  | public List<Function> getFunctions(){
  | 		List<Function> functions = new ArrayList<Function>();
  | 		if(this.listRoleFunctions != null){
  | 			for(RoleFunction rf:this.listRoleFunctions){
  | 				Function f = new Function();
  | 				f = rf.getFunction();
  | 				functions.add(f);
  | 			}
  | 		}
  | 		return functions;
  | 	}
  | 	
  | 	public void setFunctions(List<Function> functions){
  | 		if(functions.size() > this.listRoleFunctions.size()){
  | 			//New function to add
  | 			for(Function f:functions){
  | 				boolean add = true;
  | 				for(RoleFunction roleFunction:this.listRoleFunctions){
  | 					if(roleFunction.getId().equals(f.getId())){
  | 						add = false;
  | 						break;
  | 					}
  | 					
  | 				}
  | 				if(add){
  | 					RoleFunction rf = new RoleFunction();
  | 					rf.setFunction(f);
  | 					rf.setRole(this);
  | 					System.out.println("Adding (rf from lRF)"+rf.getRole().getName() +"."+rf.getFunction().getName());
  | 					this.listRoleFunctions.add(rf);
  | 				}
  | 			}
  | 		}else{
  | 			//Function to remove
  | 			System.out.println("remove function");
  | 			for(RoleFunction roleFunction:this.listRoleFunctions){
  | 				boolean remove = true;
  | 				for(Function f:functions){
  | 					if(roleFunction.getId().equals(f.getId())){
  | 						remove = false;
  | 						break;
  | 					}
  | 				}
  | 				if(remove){
  | 					this.listRoleFunctions.remove(roleFunction);
  | 				}
  | 			}
  | 		}
  | 	}
  | 

The only thing which doesn't work is if a user deselect a already saved function assignment.

I always get this error:
10:49:58,960 INFO  [STDOUT] remove function
  | 10:49:58,960 SEVERE [component] /roleList.xhtml @72,106 value="#{roleHome.instance.functions}": Error writing 'functions' on type ch.emtm.entity.Role
  | java.util.ConcurrentModificationException
  | 	at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
  | 	at java.util.AbstractList$Itr.next(AbstractList.java:343)
  | 	at org.hibernate.collection.AbstractPersistentCollection$IteratorProxy.next(AbstractPersistentCollection.java:577)
  | ...

Hope someone got input to solve this issue!
Thanks in advance for any hint

Greets

View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4263631#4263631

Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4263631