public boolean equals(FileMetadata that) {
    if (that == null)
      return false;
    if (this == that)
      return true;

    boolean this_present_type = true;
    boolean that_present_type = true;
    if (this_present_type || that_present_type) {
      if (!(this_present_type && that_present_type))
        return false;
      if (this.type != that.type)
        return false;
    }

    boolean this_present_version = true;
    boolean that_present_version = true;
    if (this_present_version || that_present_version) {
      if (!(this_present_version && that_present_version))
        return false;
      if (this.version != that.version)
        return false;
    }

    boolean this_present_data = true && this.isSetData();
    boolean that_present_data = true && that.isSetData();
    if (this_present_data || that_present_data) {
      if (!(this_present_data && that_present_data))
        return false;
      if (!this.data.equals(that.data))
        return false;
    }

    return true;
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/FileMetadata.java