Method select

storm-client/src/jvm/org/apache/storm/tuple/Fields.java:55–61

Select values out of tuple given a Fields selector Note that this function can throw a NullPointerException if the fields in selector are not found in the index. @param selector Fields to select @param tuple tuple to select from

(Fields selector, List<Object> tuple)

     * @param tuple    tuple to select from
     */
    public List<Object> select(Fields selector, List<Object> tuple) {
        List<Object> ret = new ArrayList<>(selector.size());
        for (String s : selector) {
            ret.add(tuple.get(fieldIndex(s)));
        }
        return ret;
    }

    public List<String> toList() {
        return new ArrayList<>(fields);