Problem copying a related collection

luca.preziati · **Joined:** Thu May 05, 2011 6:33 am **Posts:** 16

Hi,
I have got three entity

Code:

@Entity
public class FestivitySource implements Serializable{
...
   @ManyToMany(fetch = FetchType.LAZY)
   List<Place> listSede;
...}

@Entity
public class Festivity{
       @ManyToMany(fetch = FetchType.LAZY)
   List<Place> listSede;
}

@Entity
public class Place{
...
}

I use FestibitySource as source of my data. I populate, with my business logic, starting from FestivitySource the FestivityEntity.

so i do this:

Code:

Holiday holiday = new Holiday.Builder().withYear(DateUtils.getYear(festivityYear)).build();
         holidayService.save(holiday);
         for (FestivitySource festivitySource : list) {
            logger.debug("festivitySource {}", festivitySource);
            if (festivitySource.isEnable() && festivitySource.isInNextYear()) {

               Date currentYearDate;
               if (StringUtils.isNotEmpty(festivitySource.getComputingBean())) {
                  FestivityComputing festivityComputing = (FestivityComputing) applicationContext
                        .getBean(festivitySource.getComputingBean());
                  currentYearDate = festivityComputing.getDate(festivityYear, festivitySource);
               } else {
                  currentYearDate = defaultComputing.getDate(festivityYear, festivitySource);
               }
               Festivity festivity = new Festivity.Builder().withDescrizione(festivitySource.getDescrizione())
                     .[color=#BF0000]withListSede(festivitySource.getListSede()[/color]).withDataFestivita(currentYearDate).build();
               [color=#BF0000]festivityService.save(festivity);
[/color]
            }
         }

When I save my entity the collection is removed from source, but added to the target, as manual explain.

How can I copy?

I use hibernate 3.6.0.Final with spring 3.0.5 using Spring hibernate template and OpenSessionInView filter.

Does anybody has suggestion?

luca.preziati · **Joined:** Thu May 05, 2011 6:33 am **Posts:** 16

I have solved with this code

Code:

public static final List getListCopy(List source) {

      List result = new ArrayList();

      for (Object obj : source) {
         try {
            result.add(org.apache.commons.beanutils.BeanUtils.cloneBean(obj));
         } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         } catch (InstantiationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         } catch (NoSuchMethodException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         }
      }

      return result;
   }

The problem is that Hibernate as default move collection. You need to have a copy, not a referenced copy of collection