Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
IgnoreLeftPredicate |
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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.adapter; | |
18 | ||
19 | import java.io.Serializable; | |
20 | ||
21 | import org.apache.commons.functor.BinaryPredicate; | |
22 | import org.apache.commons.functor.UnaryPredicate; | |
23 | ||
24 | /** | |
25 | * Adapts a | |
26 | * {@link UnaryPredicate UnaryPredicate} | |
27 | * to the | |
28 | * {@link BinaryPredicate BinaryPredicate} interface | |
29 | * by ignoring the first binary argument. | |
30 | * <p/> | |
31 | * Note that although this class implements | |
32 | * {@link Serializable}, a given instance will | |
33 | * only be truly <code>Serializable</code> if the | |
34 | * underlying functor is. Attempts to serialize | |
35 | * an instance whose delegate is not | |
36 | * <code>Serializable</code> will result in an exception. | |
37 | * | |
38 | * @param <L> the left argument type. | |
39 | * @param <R> the right argument type. | |
40 | * @version $Revision: 1157611 $ $Date: 2011-08-14 21:45:14 +0200 (Sun, 14 Aug 2011) $ | |
41 | * @author Rodney Waldhoff | |
42 | */ | |
43 | public final class IgnoreLeftPredicate<L, R> implements BinaryPredicate<L, R>, Serializable { | |
44 | /** | |
45 | * serialVersionUID declaration. | |
46 | */ | |
47 | private static final long serialVersionUID = -3200352647509255939L; | |
48 | /** The {@link UnaryPredicate UnaryPredicate} I'm wrapping. */ | |
49 | private final UnaryPredicate<? super R> predicate; | |
50 | ||
51 | /** | |
52 | * Create a new IgnoreLeftPredicate. | |
53 | * @param predicate the right predicate | |
54 | */ | |
55 | 26 | public IgnoreLeftPredicate(UnaryPredicate<? super R> predicate) { |
56 | 26 | if (predicate == null) { |
57 | 0 | throw new IllegalArgumentException("UnaryPredicate argument was null"); |
58 | } | |
59 | 26 | this.predicate = predicate; |
60 | 26 | } |
61 | ||
62 | /** | |
63 | * {@inheritDoc} | |
64 | */ | |
65 | public boolean test(L left, R right) { | |
66 | 8 | return predicate.test(right); |
67 | } | |
68 | ||
69 | /** | |
70 | * {@inheritDoc} | |
71 | */ | |
72 | public boolean equals(Object that) { | |
73 | 24 | return that == this || (that instanceof IgnoreLeftPredicate<?, ?> && equals((IgnoreLeftPredicate<?, ?>) that)); |
74 | } | |
75 | ||
76 | /** | |
77 | * Learn whether another IgnoreLeftPredicate is equal to this. | |
78 | * @param that the IgnoreLeftPredicate to test | |
79 | * @return boolean | |
80 | */ | |
81 | public boolean equals(IgnoreLeftPredicate<?, ?> that) { | |
82 | 14 | return null != that && (null == predicate ? null == that.predicate : predicate.equals(that.predicate)); |
83 | } | |
84 | ||
85 | /** | |
86 | * {@inheritDoc} | |
87 | */ | |
88 | public int hashCode() { | |
89 | 26 | int hash = "IgnoreLeftPredicate".hashCode(); |
90 | 26 | if (null != predicate) { |
91 | 26 | hash ^= predicate.hashCode(); |
92 | } | |
93 | 26 | return hash; |
94 | } | |
95 | ||
96 | /** | |
97 | * {@inheritDoc} | |
98 | */ | |
99 | public String toString() { | |
100 | 18 | return "IgnoreLeftPredicate<" + predicate + ">"; |
101 | } | |
102 | ||
103 | /** | |
104 | * Adapt a UnaryPredicate to an IgnoreLeftPredicate. | |
105 | * @param <L> left type | |
106 | * @param <R> right type | |
107 | * @param predicate to adapt | |
108 | * @return IgnoreLeftPredicate<L, R> | |
109 | */ | |
110 | public static <L, R> IgnoreLeftPredicate<L, R> adapt(UnaryPredicate<? super R> predicate) { | |
111 | 12 | return null == predicate ? null : new IgnoreLeftPredicate<L, R>(predicate); |
112 | } | |
113 | ||
114 | } |