Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
CollectionUtil |
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| 2.6666666666666665;2.667 |
1 | /* | |
2 | * $Id: CollectionUtil.java 1229087 2012-01-09 10:35:14Z mck $ | |
3 | * | |
4 | * Licensed to the Apache Software Foundation (ASF) under one | |
5 | * or more contributor license agreements. See the NOTICE file | |
6 | * distributed with this work for additional information | |
7 | * regarding copyright ownership. The ASF licenses this file | |
8 | * to you under the Apache License, Version 2.0 (the | |
9 | * "License"); you may not use this file except in compliance | |
10 | * with the License. You may obtain a copy of the License at | |
11 | * | |
12 | * http://www.apache.org/licenses/LICENSE-2.0 | |
13 | * | |
14 | * Unless required by applicable law or agreed to in writing, | |
15 | * software distributed under the License is distributed on an | |
16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
17 | * KIND, either express or implied. See the License for the | |
18 | * specific language governing permissions and limitations | |
19 | * under the License. | |
20 | */ | |
21 | package org.apache.tiles.request.collection; | |
22 | ||
23 | import java.util.Enumeration; | |
24 | ||
25 | /** | |
26 | * Utilities for requests. | |
27 | * | |
28 | * @version $Rev: 1064782 $ $Date: 2011-01-28 18:08:52 +0100 (Fri, 28 Jan 2011) $ | |
29 | */ | |
30 | public final class CollectionUtil { | |
31 | ||
32 | /** | |
33 | * Constructor. | |
34 | */ | |
35 | 0 | private CollectionUtil() { |
36 | ||
37 | 0 | } |
38 | ||
39 | /** | |
40 | * Returns the string representation of the key. | |
41 | * | |
42 | * @param key The key. | |
43 | * @return The string representation of the key. | |
44 | * @throws IllegalArgumentException If the key is <code>null</code>. | |
45 | */ | |
46 | public static String key(Object key) { | |
47 | 33 | if (key == null) { |
48 | 1 | throw new IllegalArgumentException(); |
49 | 32 | } else if (key instanceof String) { |
50 | 31 | return ((String) key); |
51 | } else { | |
52 | 1 | return (key.toString()); |
53 | } | |
54 | } | |
55 | ||
56 | /** | |
57 | * Returns the number of elements in an enumeration, by iterating it. | |
58 | * | |
59 | * @param keys The enumeration. | |
60 | * @return The number of elements. | |
61 | */ | |
62 | public static int enumerationSize(Enumeration<?> keys) { | |
63 | 8 | int n = 0; |
64 | 24 | while (keys.hasMoreElements()) { |
65 | 16 | keys.nextElement(); |
66 | 16 | n++; |
67 | } | |
68 | 8 | return n; |
69 | } | |
70 | } |