/**
* Swaps eligible arguments in relations to address symmetry.
*
* @param newArgs
* @return
*/
private static Map<Class<? extends Markable>, List<? extends Markable>> swapSymmetricalArgs(
Map<Class<? extends Markable>, List<? extends Markable>> newArgs) {
Map<Class<? extends Markable>, List<? extends Markable>> result =
new HashMap<Class<? extends Markable>, List<? extends Markable>>(newArgs);
Set<Class<? extends Markable>> labels = SYMMETRIC_CLASSES.keySet();
for (Class<? extends Markable> label : labels) {
Class<? extends Markable> swapWithLabel = SYMMETRIC_CLASSES.get(label);
List<? extends Markable> origMarkables = newArgs.get(label);
Markable firstMarkable = JAXBUtil.unwrapFromList(origMarkables); // first element to swap
if (firstMarkable == null) firstMarkable = createMarkable(label);
Markable firstClone = JAXBUtil.copyObj(firstMarkable);
origMarkables = newArgs.get(swapWithLabel);
Markable secondMarkable = JAXBUtil.unwrapFromList(origMarkables); // second element to swap
if (secondMarkable == null) secondMarkable = createMarkable(swapWithLabel);
Markable secondClone = JAXBUtil.copyObj(secondMarkable);
swap(firstClone, secondClone);
// set those which received value from nulls to nulls.
if (firstClone.getStart() == null) firstClone = null;
if (secondClone.getStart() == null) secondClone = null;
result.put(label, JAXBUtil.wrapToList(firstClone));
result.put(swapWithLabel, JAXBUtil.wrapToList(secondClone));
}
return result;
}
