import org.apache.lucene.queries.function.docvalues.LongDocValues; //导入依赖的package包/类
@Override
public void createWeight(Map context, IndexSearcher searcher) throws IOException {
  long totalTermFreq = 0;
  for (AtomicReaderContext readerContext : searcher.getTopReaderContext().leaves()) {
    long val = readerContext.reader().totalTermFreq(new Term(indexedField, indexedBytes));
    if (val == -1) {
      totalTermFreq = -1;
      break;
    } else {
      totalTermFreq += val;
    }
  }
  final long ttf = totalTermFreq;
  context.put(this, new LongDocValues(this) {
    @Override
    public long longVal(int doc) {
      return ttf;
    }
  });
}
 

import org.apache.lucene.queries.function.docvalues.LongDocValues; //导入依赖的package包/类
@Override
public void createWeight(Map context, IndexSearcher searcher) throws IOException {
  long sumTotalTermFreq = 0;
  for (AtomicReaderContext readerContext : searcher.getTopReaderContext().leaves()) {
    Fields fields = readerContext.reader().fields();
    if (fields == null) continue;
    Terms terms = fields.terms(indexedField);
    if (terms == null) continue;
    long v = terms.getSumTotalTermFreq();
    if (v == -1) {
      sumTotalTermFreq = -1;
      break;
    } else {
      sumTotalTermFreq += v;
    }
  }
  final long ttf = sumTotalTermFreq;
  context.put(this, new LongDocValues(this) {
    @Override
    public long longVal(int doc) {
      return ttf;
    }
  });
}