Review

class TermBuffer {
  public final void read(IndexInput input, FieldInfos fieldInfos)
    throws IOException {
    this.term = null;                           // invalidate cache
    int start = input.readVInt();
    int length = input.readVInt();
    int totalLength = start + length;
    setTextLength(totalLength);
    input.readChars(this.text, start, length);
    this.field = fieldInfos.fieldName(input.readVInt());
  }

}