FindByKey not used in ADFToyStore (buggy?)

Question

When working with ADF and JSP Pages, I found that using RowSetIterator.findByKey (called by DCIteratorBinding.setCurrentRowWithKey) has several issues: If called from the client side (DataForwardAction) and working in Sync Mode, it constantly throws a JBO-25020: View row of key <key> not found in <iterator> (even if the Key is taken from the currentRow !). When working in Batch Mode, I found no errors, but we decided to work in sync mode.
Calling RowSetIterator.findByKey from the ApplicationModule finds the rows, but it seems to run the query unnecessarily (i.e., the query is performed in spite of the Row being in the default RowSetIter, and the fetch size is set to 1), just as if there was created a secondary RowSetIterator.
Is it a coincidence that I have not found any usage of findByKey in the ADFToyStore ?

Answer 1

I attempted to use this with a multi part key as follows:
ViewObject vo = am.findViewObject("xyz1")
Object[] myKey = new Object[]{
"C","Description"
Row[] findRow = vo.findByKey(findKey, -1);
this returns one row as it should but if i do not use a complete key as follows:
Object[] myKey = new Object[]{
"C", null
Row[] findRow = vo.findByKey(findKey, -1);
it dosnt find any of the rows. Is there some other reason the null part of the key should not work in this case as it would with a entity based vo?