Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
EmptyIterable |
|
| 1.5;1.5 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one | |
3 | * or more contributor license agreements. See the NOTICE file | |
4 | * distributed with this work for additional information | |
5 | * regarding copyright ownership. The ASF licenses this file | |
6 | * to you under the Apache License, Version 2.0 (the | |
7 | * "License"); you may not use this file except in compliance | |
8 | * with the License. You may obtain a copy of the License at | |
9 | * | |
10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
11 | * | |
12 | * Unless required by applicable law or agreed to in writing, software | |
13 | * distributed under the License is distributed on an "AS IS" BASIS, | |
14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
15 | * See the License for the specific language governing permissions and | |
16 | * limitations under the License. | |
17 | */ | |
18 | ||
19 | package org.apache.giraph.utils; | |
20 | ||
21 | import java.util.Iterator; | |
22 | import java.util.NoSuchElementException; | |
23 | ||
24 | /** | |
25 | * Helper empty iterable when there are no messages. | |
26 | * | |
27 | * @param <M> Message data | |
28 | */ | |
29 | 0 | public class EmptyIterable<M> implements Iterable<M>, Iterator<M> { |
30 | @Override | |
31 | public Iterator<M> iterator() { | |
32 | 0 | return this; |
33 | } | |
34 | ||
35 | @Override | |
36 | public boolean hasNext() { | |
37 | 0 | return false; |
38 | } | |
39 | ||
40 | @Override | |
41 | public M next() { | |
42 | 0 | throw new NoSuchElementException(); |
43 | } | |
44 | ||
45 | @Override | |
46 | public void remove() { | |
47 | 0 | throw new UnsupportedOperationException(); |
48 | } | |
49 | } | |
50 |