Hi, 
 
here's an issue I came across the other day and it took me quite a while to figure 
out, so I thought 
I'd let everyone know and maybe someone could include a note in the WoodyBinding 
documentation on the wiki: 
 
I had a bean with a Collection of type HashSet which I was trying to bind to a Woody 
Form. 
Reading it worked perfectly, updating, too. But inserting a couple of new elements at 
a time 
caused a problem: The binding seemed to save only some elements and create empty 
collection 
elements (no values set) for others. 
 
Tracing the problem through the woody code, I realised that the code implies the use 
of ordered 
collections such as LinkedList, ArrayList...  
Woody first creates a new element instance and adds it to the collection. It then 
obtains it from 
the collection using jxpath syntax "mybean/collection[count]" to fill in the values. 
"count" is the 
new number of elements in the collection (after insertion) which assumes that the new 
element 
has been added at the end. This is true for Lists, but not for my HashSet. So, in 
fact, any odd 
element would be retrieved, possibly the new one and possibly not. That produced an 
unpredictable behaviour where element values would be overwritten and others left 
blank. 
 
Maybe that could be pointed out more clearly on the wiki page where it only says that 
the property 
has to be of type Collection. Might save others some time. 
 
Thanks 
Stefan 
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