@Override
  public String getFullPath() {
    if (fullPath == null) {
      StringBuilder s = new StringBuilder(nodes[0]);
      for (int i = 1; i < nodes.length; i++) {
        s.append(TsFileConstant.PATH_SEPARATOR).append(nodes[i]);
      }
      fullPath = s.toString();
    }
    return fullPath;
  }
Generate a list of partial paths which are the intersection of this path pattern and input
prefix pattern.

@param prefixPattern must be a prefix full path ending with one "**", like "root.sg.**"
@return a list of partial paths which are the intersection of this path pattern and input
    prefix pattern.
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/path/PartialPath.java