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.io.IOException;
21 import java.util.Iterator;
22 import java.util.Objects;
23
24 /**
25 * Adapts an {@link Iterator} as an {@link IOIterator}.
26 *
27 * @param <E> the type of the stream elements.
28 */
29 final class IOIteratorAdapter<E> implements IOIterator<E> {
30
31 static <E> IOIteratorAdapter<E> adapt(final Iterator<E> delegate) {
32 return new IOIteratorAdapter<>(delegate);
33 }
34
35 private final Iterator<E> delegate;
36
37 IOIteratorAdapter(final Iterator<E> delegate) {
38 this.delegate = Objects.requireNonNull(delegate, "delegate");
39 }
40
41 @Override
42 public boolean hasNext() throws IOException {
43 return delegate.hasNext();
44 }
45
46 @Override
47 public E next() throws IOException {
48 return delegate.next();
49 }
50
51 @Override
52 public Iterator<E> unwrap() {
53 return delegate;
54 }
55
56 }