private <A extends Action<R>, R extends Result> void maintainCache(A action, R result) {
if (action instanceof WriteAction) {
clearCache();
} else if (action instanceof BatchAction) {
BatchAction batchAction = (BatchAction) action;
BatchResult batchRestul = (BatchResult) result;
for (int i = 0; i < batchAction.getActions().length; i++) {
// FIXME caste is workaround
maintainCache((A) batchAction.getActions()[i], (R) batchRestul.getResult(i));
}
} else if (action instanceof CachableReadAction) {
cachedActions.put(action, new CachedResult(result));
}
}
private <A extends Action<R>, R extends Result> R fromCache(A action) {
if (action instanceof CachableReadAction) {
CachedResult result = cachedActions.get(action);
return (R) (result == null ? null : result.getResult());
} else if (action instanceof BatchAction) {
BatchAction ba = (BatchAction) action;
List<Result> results = new ArrayList<Result>(ba.getActions().length);
for (Action<?> batchAction : ba.getActions()) {
Result batchResult = fromCache(batchAction);
if (batchResult == null) {
return null;
}
results.add(batchResult);
}
return (R) new BatchResult(results, Collections.EMPTY_LIST);
}
return null;
}