Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ComparisonUtils |
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| 4.714285714285714;4.714 |
1 | /* | |
2 | * Copyright (c) 2000 | |
3 | * Jon Schewe. All rights reserved | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
24 | * SUCH DAMAGE. | |
25 | * | |
26 | * I'd appreciate comments/suggestions on the code jpschewe@mtu.net | |
27 | */ | |
28 | package net.mtu.eggplant.util; | |
29 | ||
30 | /** | |
31 | * Handy comparision routines. | |
32 | * | |
33 | * @version $Revision$ | |
34 | */ | |
35 | public final class ComparisonUtils { | |
36 | ||
37 | 0 | private ComparisonUtils() { |
38 | 0 | } |
39 | ||
40 | /** | |
41 | * true is always greater than false. | |
42 | **/ | |
43 | public static int compareBooleans(final boolean one, | |
44 | final boolean two) { | |
45 | 0 | if (one == two) { |
46 | 0 | return 0; |
47 | 0 | } else if (one) { |
48 | 0 | return -1; |
49 | } else { | |
50 | 0 | return 1; |
51 | } | |
52 | } | |
53 | ||
54 | /** | |
55 | * Compare two non-floating point numbers. | |
56 | **/ | |
57 | public static int compareIntegers(final long one, | |
58 | final long two) { | |
59 | 0 | if (one == two) { |
60 | 0 | return 0; |
61 | 0 | } else if (one < two) { |
62 | 0 | return -1; |
63 | } else { | |
64 | 0 | return 1; |
65 | } | |
66 | } | |
67 | ||
68 | /** | |
69 | * Compare two doubles. Comparisions exist for double and float because | |
70 | * casting a float to a double and vice versa can cause loss of precision. | |
71 | **/ | |
72 | public static int compareDoubles(final double one, | |
73 | final double two) { | |
74 | 0 | if (one == two) { |
75 | 0 | return 0; |
76 | 0 | } else if (one < two) { |
77 | 0 | return -1; |
78 | } else { | |
79 | 0 | return 1; |
80 | } | |
81 | } | |
82 | ||
83 | /** | |
84 | * Compare two floats. Comparisions exist for double and float because casting | |
85 | * a float to a double and vice versa can cause loss of precision. | |
86 | **/ | |
87 | public static int compareFloats(final float one, | |
88 | final float two) { | |
89 | 0 | if (one == two) { |
90 | 0 | return 0; |
91 | 0 | } else if (one < two) { |
92 | 0 | return -1; |
93 | } else { | |
94 | 0 | return 1; |
95 | } | |
96 | } | |
97 | ||
98 | /** | |
99 | * Compare two Strings, null is allowed and is greater than every non-null | |
100 | * String. | |
101 | **/ | |
102 | public static int compareStrings(final String one, | |
103 | final String two) { | |
104 | 0 | if (one == null) { |
105 | 0 | if (two == null) { |
106 | 0 | return 0; |
107 | } else { | |
108 | 0 | return 1; |
109 | } | |
110 | } else { | |
111 | 0 | if (two == null) { |
112 | 0 | return -1; |
113 | } else { | |
114 | 0 | return one.compareTo(two); |
115 | } | |
116 | } | |
117 | } | |
118 | ||
119 | /** | |
120 | * Equals call that handles null without a NullPointerException. | |
121 | */ | |
122 | public static boolean safeEquals(final Object o1, | |
123 | final Object o2) { | |
124 | 0 | if (o1 == o2) { |
125 | 0 | return true; |
126 | 0 | } else if (null == o1) { |
127 | 0 | return false; |
128 | } else { | |
129 | 0 | return o1.equals(o2); |
130 | } | |
131 | } | |
132 | ||
133 | } |