001/*
002 * Licensed to DuraSpace under one or more contributor license agreements.
003 * See the NOTICE file distributed with this work for additional information
004 * regarding copyright ownership.
005 *
006 * DuraSpace licenses this file to you under the Apache License,
007 * Version 2.0 (the "License"); you may not use this file except in
008 * compliance with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.fcrepo.kernel.modeshape.utils;
019
020import static java.util.Spliterator.IMMUTABLE;
021import static java.util.Spliterators.spliteratorUnknownSize;
022import static java.util.stream.StreamSupport.stream;
023
024import java.util.Iterator;
025import java.util.stream.Stream;
026
027/**
028 * @author acoburn
029 * @since February 10, 2016
030 */
031public class StreamUtils {
032
033    /**
034     * Convert an Iterator to a Stream
035     *
036     * @param iterator the iterator
037     * @param <T> the type of the Stream
038     * @return the stream
039     */
040    public static <T> Stream<T> iteratorToStream(final Iterator<T> iterator) {
041        return iteratorToStream(iterator, false);
042    }
043
044    /**
045     * Convert an Iterator to a Stream
046     *
047     * @param <T> the type of the Stream
048     * @param iterator the iterator
049     * @param parallel whether to parallelize the stream
050     * @return the stream
051     */
052    public static <T> Stream<T> iteratorToStream(final Iterator<T> iterator, final Boolean parallel) {
053        return stream(spliteratorUnknownSize(iterator, IMMUTABLE), parallel);
054    }
055    private StreamUtils() {
056        // prevent instantiation
057    }
058}
059