Java Stream Operation orStream(Stream> stream)

Description

or Stream

License

Apache License

Declaration

private static <T> Optional<T> orStream(Stream<Optional<T>> stream) 

Method Source Code

//package com.java2s;
/****************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one   *
 * or more contributor license agreements.  See the NOTICE file *
 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you 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.                                           *
 ****************************************************************/

import java.util.Optional;

import java.util.stream.Stream;

public class Main {
    private static <T> Optional<T> orStream(Stream<Optional<T>> stream) {
        return stream.filter(Optional::isPresent).findFirst().orElse(Optional.empty());
    }/*from w  ww  . j a v a 2 s. c o  m*/
}

Related

1. nullableStreamOf(Collection nullableCollection)
2. ofType(Stream stream, Class type)
3. opt2stream(Optional opt)
4. optionalToStream(final Optional optional)
5. optionalToStream(Optional optional)
6. parallelStreamFromIterable(Iterable in)
7. prepend(final T first, final Stream rest)
8. rangeStream(int n, boolean parallel)
9. readStream(Stream s, boolean lowercase)