Examples with Reducer cyclops.function.Reducer used on opensource projects

Example 1 with Reducer

use of cyclops.function.Reducer in project cyclops by aol.

the class MultiReduceOperator method reduce.

@SuppressWarnings({ "rawtypes", "unchecked" })
public List<R> reduce(final Iterable<? extends Monoid<R>> reducers) {
    final Reducer<List<R>, R> m = new Reducer<List<R>, R>() {

        @Override
        public Function<? super R, List<R>> conversion() {
            return a -> Arrays.asList(a);
        }

        @Override
        public List<R> zero() {
            return Streams.stream(reducers).map(r -> r.zero()).collect(Collectors.toList());
        }

        @Override
        public Stream mapToType(final Stream stream) {
            return stream.map(value -> Arrays.asList(value));
        }

        @Override
        public List<R> apply(final List<R> c1, final List<R> c2) {
            final List l = new ArrayList<>();
            int i = 0;
            for (final Monoid next : reducers) {
                l.add(next.apply(c1.get(i), c2.get(0)));
                i++;
            }
            return l;
        }
    };
    return m.foldMap(stream);
}