private List<ScoredPhrasePairForSentence> readBackPointers(
DecoderState state,
List<HashMap<DecoderState, BackPointerElement>> backPointersList,
int startLength,
int sentenceLength) {
DecoderState curState = state;
DecoderState startState = getStartState(sentenceLength);
int curLength = startLength;
List<ScoredPhrasePairForSentence> phrases = new ArrayList<>();
while (!curState.equals(startState)) {
BackPointerElement backPointer = backPointersList.get(curLength).get(curState);
phrases.add(0, backPointer.getPhrase());
curState = backPointer.getState();
curLength = decoderModel.getDecodedLength(curState);
}
return phrases;
}
