Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
IsWithinRange |
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| 2.8333333333333335;2.833 |
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.functor.core.comparator; | |
18 | ||
19 | import java.io.Serializable; | |
20 | import org.apache.commons.functor.UnaryPredicate; | |
21 | ||
22 | /** | |
23 | * A {@link UnaryPredicate} that tests whether a {@link Comparable} object is | |
24 | * within a range. The range is defined in the constructor. | |
25 | * | |
26 | * @since 1.0 | |
27 | * @version $Revision: 1171154 $ $Date: 2011-09-15 17:58:38 +0200 (Thu, 15 Sep 2011) $ | |
28 | * @author Jason Horman (jason@jhorman.org) | |
29 | */ | |
30 | ||
31 | 0 | public class IsWithinRange<A extends Comparable<A>> implements UnaryPredicate<A>, Serializable { |
32 | /** | |
33 | * serialVersionUID declaration. | |
34 | */ | |
35 | private static final long serialVersionUID = -7584005207181667878L; | |
36 | ||
37 | /** Hashcode of the name of this Predicate. */ | |
38 | 2 | private static final int NAME_HASH_CODE = "IsWithinRange".hashCode(); |
39 | ||
40 | /** Base Hashcode. */ | |
41 | private static final int BASE_HASH_CODE = 29; | |
42 | ||
43 | /*************************************************** | |
44 | * Instance variables | |
45 | ***************************************************/ | |
46 | ||
47 | /** The minimum value of the range. */ | |
48 | private final A min; | |
49 | /** The maximum value of the range. */ | |
50 | private final A max; | |
51 | ||
52 | /*************************************************** | |
53 | * Constructors | |
54 | ***************************************************/ | |
55 | ||
56 | /** | |
57 | * Create a new IsWithinRange by passing in the range that will | |
58 | * be used in the {@link #test}. | |
59 | * @param min Comparable | |
60 | * @param max Comparable | |
61 | */ | |
62 | 24 | public IsWithinRange(A min, A max) { |
63 | 24 | if (min == null || max == null) { |
64 | 2 | throw new IllegalArgumentException("min and max must not be null"); |
65 | } | |
66 | 22 | if (min.compareTo(max) > 0) { |
67 | 2 | throw new IllegalArgumentException("min must be <= max"); |
68 | } | |
69 | 20 | this.min = min; |
70 | 20 | this.max = max; |
71 | 20 | } |
72 | ||
73 | /*************************************************** | |
74 | * Instance methods | |
75 | ***************************************************/ | |
76 | ||
77 | /** | |
78 | * {@inheritDoc} | |
79 | * Test if the passed in object is within the specified range. | |
80 | */ | |
81 | public final boolean test(A o) { | |
82 | 32 | return o.compareTo(min) >= 0 && o.compareTo(max) <= 0; |
83 | } | |
84 | ||
85 | /** | |
86 | * {@inheritDoc} | |
87 | */ | |
88 | public final boolean equals(Object o) { | |
89 | 16 | if (this == o) { |
90 | 2 | return true; |
91 | } | |
92 | 14 | if (!(o instanceof IsWithinRange<?>)) { |
93 | 2 | return false; |
94 | } | |
95 | 12 | final IsWithinRange<?> isWithinRange = (IsWithinRange<?>) o; |
96 | 12 | return max.equals(isWithinRange.max) && min.equals(isWithinRange.min); |
97 | } | |
98 | ||
99 | /** | |
100 | * {@inheritDoc} | |
101 | */ | |
102 | public int hashCode() { | |
103 | 14 | return BASE_HASH_CODE * min.hashCode() + max.hashCode() + NAME_HASH_CODE; |
104 | } | |
105 | ||
106 | /** | |
107 | * {@inheritDoc} | |
108 | */ | |
109 | public String toString() { | |
110 | 6 | return "IsWithinRange(" + min + ", " + max + ")"; |
111 | } | |
112 | ||
113 | /** | |
114 | * Obtain an IsWithinRange instance. | |
115 | * @param <A> | |
116 | * @param min A | |
117 | * @param max A | |
118 | * @return IsWithinRange<A> | |
119 | */ | |
120 | public static <A extends Comparable<A>> IsWithinRange<A> instance(A min, A max) { | |
121 | 2 | return new IsWithinRange<A>(min, max); |
122 | } | |
123 | } |