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Streams Utils is a set of operations written on Java 8 Streams. It allows several basic operations that are not available in the the Java 8, and that have proven to be very useful in some cases.

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/*
 * Copyright (C) 2015 José Paumard
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.paumard.spliterators;

import java.util.List;
import java.util.Objects;
import java.util.Spliterator;
import java.util.function.Consumer;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

import static java.util.stream.Collectors.toList;

/**
 * Created by José
 */
public class CyclingSpliterator implements Spliterator> {

    private final List list;

    public static  CyclingSpliterator of(Spliterator spliterator) {
        Objects.requireNonNull(spliterator);
        return new CyclingSpliterator<>(spliterator);
    }

    private CyclingSpliterator(List list) {
        this.list = list;
    }

    private CyclingSpliterator(Spliterator spliterator) {
        this.list = StreamSupport.stream(spliterator, false).collect(toList());
    }

    @Override
    public boolean tryAdvance(Consumer> action) {
        action.accept(list.stream());
        return true;
    }

    @Override
    public Spliterator> trySplit() {
        return new CyclingSpliterator<>(list);
    }

    @Override
    public long estimateSize() {
        return Long.MAX_VALUE;
    }

    @Override
    public int characteristics() {
        return Spliterator.ORDERED;
    }
}