Yet another ConcurrentModificationException question

Hi folks,

Apologies for asking about this FAQ. I have looked up the relevant
java tutorial but I just want to check my understanding with the
following example.

Iterator oIterator = m_oCollection.iterator();
while( oIterator.hasNext()) {
            Element oElement = (Element)oIterator.next();
            String sOIDValue =
oElement.getAttribute(oElement.getOIDKey());
            if( sOIDValue != null && sOIDValue.equals(sElementOID) ) {
                // We have a match
                return oElement;
            }
        }

If I know that neither getAttribute() or getOIDKey() can alter the
"structure" of m_oCollection, is it true to say that a
ConcurrentModificationException thrown from within the body of the
while loop above, *must* have been caused by another thread altering
the structure of m_oCollection?

So to prevent this from happening, I can make m_oCollection a
synchronized Vector (currently it is just a normal vector), and put
this while loop inside a synchronized block.

Many Thanks,
Andy