import edu.stanford.nlp.process.SerializableFunction; //导入依赖的package包/类
public PostprocessorDocumentReaderAndWriter(Preprocessor preprocessor) {
  this.preProcessor = preprocessor;
  this.factory = LineIterator.getFactory(new SerializableFunction<String, List<CoreLabel>>() {
    private static final long serialVersionUID = 3695624909844929834L;
    @Override
    public List<CoreLabel> apply(String in) {
      SymmetricalWordAlignment alignment = preProcessor.processAndAlign(in.trim());
      return ProcessorTools.alignedPairToLabeledSequence(alignment);
    }
  });
}