Problem solved: trying to be smart the Item.setFolder method was implemented
as following:
public void setFolder(Folder folder) {
| this.folder = folder;
| folder.getItems().add(this);
| }
In reality item.setFolder and folder.getItems().add are called as necessary by
the framework when loading objects from the db. The above implementation o f
setFolder adds every item a second time resulting in a list containg every item
twice. Removing the
folder.getItems().add(this);
line solved the problem :-)
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