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.BooleanIterator;
22
23 /**
24 * Adapts a {@link Boolean Boolean}-valued {@link java.util.Iterator Iterator}
25 * to the {@link org.apache.commons.collections.primitives.BooleanIterator
26 * BooleanIterator} interface.
27 * <p />
28 * This implementation delegates most methods to the provided {@link
29 * java.util.Iterator Iterator} implementation in the "obvious" way.
30 *
31 * @since Commons Primitives 1.2
32 * @version $Revision: 480462 $
33 */
34 public class IteratorBooleanIterator implements BooleanIterator {
35
36 /**
37 * Create an {@link org.apache.commons.collections.primitives.BooleanIterator
38 * BooleanIterator} wrapping the specified {@link java.util.Iterator
39 * Iterator}. When the given <i>iterator</i> is <code>null</code>, returns
40 * <code>null</code>.
41 *
42 * @param iterator the (possibly <code>null</code>)
43 * {@link java.util.Iterator Iterator} to wrap
44 * @return an {@link
45 * org.apache.commons.collections.primitives.BooleanIterator BooleanIterator}
46 * wrapping the given <i>iterator</i>, or <code>null</code> when <i>
47 * iterator</i> is <code>null</code>.
48 */
49 public static BooleanIterator wrap(Iterator iterator) {
50 return null == iterator ? null : new IteratorBooleanIterator(iterator);
51 }
52
53 /**
54 * Creates an {@link org.apache.commons.collections.primitives.BooleanIterator
55 * BooleanIterator} wrapping the specified {@link java.util.Iterator Iterator}.
56 * @see #wrap
57 */
58 public IteratorBooleanIterator(Iterator iterator) {
59 _iterator = iterator;
60 }
61
62 public boolean hasNext() {
63 return _iterator.hasNext();
64 }
65
66 public boolean next() {
67 return ((Boolean)(_iterator.next())).booleanValue();
68 }
69
70 public void remove() {
71 _iterator.remove();
72 }
73
74 private Iterator _iterator = null;
75
76 }