Object obj2 = (ObjectInspectorUtils.copyToStandardObject(keyFields.get(1)
.evaluate(row), keyFieldsOI.get(1),
ObjectInspectorCopyOption.WRITABLE));
MapJoinDoubleKeys key = new MapJoinDoubleKeys(obj1,obj2);
return key;
}else{
// Compute the keys
Object[] nr = new Object[keyFields.size()];
for (int i = 0; i < keyFields.size(); i++) {