1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.io.function;
19
20 import java.util.stream.Stream;
21
22 /**
23 * Adapts an {@link Stream} as an {@link IOStream}.
24 *
25 * Keep package-private for now.
26 *
27 * @param <T> the type of the stream elements.
28 */
29 final class IOStreamAdapter<T> extends IOBaseStreamAdapter<T, IOStream<T>, Stream<T>> implements IOStream<T> {
30
31 static <T> IOStream<T> adapt(final Stream<T> delegate) {
32 return delegate != null ? new IOStreamAdapter<>(delegate) : IOStream.empty();
33 }
34
35 private IOStreamAdapter(final Stream<T> delegate) {
36 super(delegate);
37 }
38
39 @Override
40 public IOStream<T> wrap(final Stream<T> delegate) {
41 return unwrap() == delegate ? this : adapt(delegate);
42 }
43
44 }