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 package org.apache.commons.collections.primitives.adapters;
18
19 import java.util.Iterator;
20
21 import org.apache.commons.collections.primitives.ByteIterator;
22
23 /**
24 * Adapts a {@link java.lang.Number Number}-valued
25 * {@link Iterator Iterator}
26 * to the {@link ByteIterator ByteIterator}
27 * interface.
28 * <p />
29 * This implementation delegates most methods
30 * to the provided {@link Iterator Iterator}
31 * implementation in the "obvious" way.
32 *
33 * @since Commons Primitives 1.0
34 * @version $Revision: 480462 $ $Date: 2006-11-29 03:15:00 -0500 (Wed, 29 Nov 2006) $
35 * @author Rodney Waldhoff
36 */
37 public class IteratorByteIterator implements ByteIterator {
38
39 /**
40 * Create an {@link ByteIterator ByteIterator} wrapping
41 * the specified {@link Iterator Iterator}. When
42 * the given <i>iterator</i> is <code>null</code>,
43 * returns <code>null</code>.
44 *
45 * @param iterator the (possibly <code>null</code>)
46 * {@link Iterator Iterator} to wrap
47 * @return an {@link ByteIterator ByteIterator} wrapping the given
48 * <i>iterator</i>, or <code>null</code> when <i>iterator</i> is
49 * <code>null</code>.
50 */
51 public static ByteIterator wrap(Iterator iterator) {
52 return null == iterator ? null : new IteratorByteIterator(iterator);
53 }
54
55 /**
56 * Creates an {@link ByteIterator ByteIterator} wrapping
57 * the specified {@link Iterator Iterator}.
58 * @see #wrap
59 */
60 public IteratorByteIterator(Iterator iterator) {
61 _iterator = iterator;
62 }
63
64 public boolean hasNext() {
65 return _iterator.hasNext();
66 }
67
68 public byte next() {
69 return ((Number)(_iterator.next())).byteValue();
70 }
71
72 public void remove() {
73 _iterator.remove();
74 }
75
76 private Iterator _iterator = null;
77
78 }