/** Returns the current value for this id, or null if the id isn't in the index or was deleted. */
public T get(String id) throws IOException {
// First try to get the "live" value:
T value = current.get(id);
if (value == missingValue) {
// Deleted but the deletion is not yet reflected in
// the reader:
return null;
} else if (value != null) {
return value;
} else {
value = old.get(id);
if (value == missingValue) {
// Deleted but the deletion is not yet reflected in
// the reader:
return null;
} else if (value != null) {
return value;
} else {
// It either does not exist in the index, or, it was
// already flushed & NRT reader was opened on the
// segment, so fallback to current searcher:
S s = mgr.acquire();
try {
return lookupFromSearcher(s, id);
} finally {
mgr.release(s);
}
}
}
}
