/**
* Convert a TripleID object to a TripleString, using the dictionary to perform the conversion.
* If any of the components do not exist in the dictionary, it throws an exception.
* @param tripleID TripleID to be converted.
* @return resultant TripleSTring
*/
void tripleIDtoTripleString(TripleID &tripleID, TripleString &ts) {
string s = idToString(tripleID.getSubject(), SUBJECT);
string p = idToString(tripleID.getPredicate(), PREDICATE);
string o = idToString(tripleID.getObject(), OBJECT);
ts.setSubject(s);
ts.setPredicate(p);
ts.setObject(o);
}
