Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
BinaryNot |
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| 2.142857142857143;2.143 |
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.composite; | |
18 | ||
19 | import java.io.Serializable; | |
20 | ||
21 | import org.apache.commons.functor.BinaryPredicate; | |
22 | ||
23 | /** | |
24 | * {@link #test Tests} to the logical inverse | |
25 | * of some other predicate. | |
26 | * <p> | |
27 | * Note that although this class implements | |
28 | * {@link Serializable}, a given instance will | |
29 | * only be truly <code>Serializable</code> if the | |
30 | * underlying functor is. Attempts to serialize | |
31 | * an instance whose delegate is not | |
32 | * <code>Serializable</code> will result in an exception. | |
33 | * </p> | |
34 | * @version $Revision: 1156320 $ $Date: 2011-08-10 21:14:50 +0200 (Wed, 10 Aug 2011) $ | |
35 | * @author Rodney Waldhoff | |
36 | */ | |
37 | public final class BinaryNot<L, R> implements BinaryPredicate<L, R>, Serializable { | |
38 | /** | |
39 | * serialVersionUID declaration. | |
40 | */ | |
41 | private static final long serialVersionUID = -3488974286912054737L; | |
42 | // attributes | |
43 | // ------------------------------------------------------------------------ | |
44 | private final BinaryPredicate<? super L, ? super R> predicate; | |
45 | ||
46 | // constructor | |
47 | // ------------------------------------------------------------------------ | |
48 | /** | |
49 | * Create a new BinaryNot. | |
50 | * @param predicate BinaryPredicate to negate | |
51 | */ | |
52 | 20 | public BinaryNot(BinaryPredicate<? super L, ? super R> predicate) { |
53 | 20 | if (predicate == null) { |
54 | 0 | throw new IllegalArgumentException("BinaryPredicate argument was null"); |
55 | } | |
56 | 20 | this.predicate = predicate; |
57 | 20 | } |
58 | ||
59 | // predicate interface | |
60 | // ------------------------------------------------------------------------ | |
61 | /** | |
62 | * {@inheritDoc} | |
63 | */ | |
64 | public boolean test(L left, R right) { | |
65 | 6 | return !(predicate.test(left, right)); |
66 | } | |
67 | ||
68 | /** | |
69 | * {@inheritDoc} | |
70 | */ | |
71 | public boolean equals(Object that) { | |
72 | 26 | return that == this || (that instanceof BinaryNot<?, ?> && equals((BinaryNot<?, ?>) that)); |
73 | } | |
74 | ||
75 | /** | |
76 | * Learn whether another BinaryNot is equal to this. | |
77 | * @param that BinaryNot to test | |
78 | * @return boolean | |
79 | */ | |
80 | public boolean equals(BinaryNot<?, ?> that) { | |
81 | 18 | return null != that && (null == predicate ? null == that.predicate : predicate.equals(that.predicate)); |
82 | } | |
83 | ||
84 | /** | |
85 | * {@inheritDoc} | |
86 | */ | |
87 | public int hashCode() { | |
88 | 28 | int hash = "BinaryNot".hashCode(); |
89 | 28 | if (null != predicate) { |
90 | 28 | hash ^= predicate.hashCode(); |
91 | } | |
92 | 28 | return hash; |
93 | } | |
94 | ||
95 | /** | |
96 | * {@inheritDoc} | |
97 | */ | |
98 | public String toString() { | |
99 | 20 | return "BinaryNot<" + predicate + ">"; |
100 | } | |
101 | ||
102 | // static | |
103 | // ------------------------------------------------------------------------ | |
104 | /** | |
105 | * Negate a BinaryPredicate. | |
106 | * @param that BinaryPredicate to negate | |
107 | * @return BinaryPredicate | |
108 | */ | |
109 | public static <L, R> BinaryPredicate<L, R> not(BinaryPredicate<? super L, ? super R> that) { | |
110 | 6 | return null == that ? null : new BinaryNot<L, R>(that); |
111 | } | |
112 | ||
113 | } |