| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| ConditionalUnaryPredicate |
|
| 3.6666666666666665;3.667 |
| 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.UnaryPredicate; | |
| 22 | ||
| 23 | /** | |
| 24 | * A {@link UnaryPredicate UnaryPredicate} | |
| 25 | * similiar to Java's "ternary" | |
| 26 | * or "conditional" operator (<code>? :</code>). | |
| 27 | * Given three {@link UnaryPredicate predicate} | |
| 28 | * <i>p</i>, <i>q</i>, <i>r</i>, | |
| 29 | * {@link #test tests} | |
| 30 | * to | |
| 31 | * <code>p.test(x) ? q.test(x) : r.test(x)</code>. | |
| 32 | * <p> | |
| 33 | * Note that although this class implements | |
| 34 | * {@link Serializable}, a given instance will | |
| 35 | * only be truly <code>Serializable</code> if all the | |
| 36 | * underlying functors are. Attempts to serialize | |
| 37 | * an instance whose delegates are not all | |
| 38 | * <code>Serializable</code> will result in an exception. | |
| 39 | * </p> | |
| 40 | * @version $Revision: 1170779 $ $Date: 2011-09-14 21:16:47 +0200 (Wed, 14 Sep 2011) $ | |
| 41 | * @author Rodney Waldhoff | |
| 42 | */ | |
| 43 | public final class ConditionalUnaryPredicate<A> implements UnaryPredicate<A>, Serializable { | |
| 44 | /** | |
| 45 | * serialVersionUID declaration. | |
| 46 | */ | |
| 47 | private static final long serialVersionUID = 1214714029872180155L; | |
| 48 | ||
| 49 | /** Base hash integer used to shift hash */ | |
| 50 | private static final int HASH_SHIFT = 4; | |
| 51 | // attributes | |
| 52 | // ------------------------------------------------------------------------ | |
| 53 | private final UnaryPredicate<? super A> ifPred; | |
| 54 | private final UnaryPredicate<? super A> thenPred; | |
| 55 | private final UnaryPredicate<? super A> elsePred; | |
| 56 | ||
| 57 | // constructor | |
| 58 | // ------------------------------------------------------------------------ | |
| 59 | /** | |
| 60 | * Create a new ConditionalUnaryPredicate. | |
| 61 | * @param ifPred if | |
| 62 | * @param thenPred then | |
| 63 | * @param elsePred else | |
| 64 | */ | |
| 65 | public ConditionalUnaryPredicate(UnaryPredicate<? super A> ifPred, UnaryPredicate<? super A> thenPred, | |
| 66 | 20 | UnaryPredicate<? super A> elsePred) { |
| 67 | 20 | if (ifPred == null || thenPred == null || elsePred == null) { |
| 68 | 0 | throw new IllegalArgumentException("One or more UnaryPredicate arguments was null"); |
| 69 | } | |
| 70 | 20 | this.ifPred = ifPred; |
| 71 | 20 | this.thenPred = thenPred; |
| 72 | 20 | this.elsePred = elsePred; |
| 73 | 20 | } |
| 74 | ||
| 75 | // predicate interface | |
| 76 | // ------------------------------------------------------------------------ | |
| 77 | /** | |
| 78 | * {@inheritDoc} | |
| 79 | */ | |
| 80 | public boolean test(A obj) { | |
| 81 | 4 | return ifPred.test(obj) ? thenPred.test(obj) : elsePred.test(obj); |
| 82 | } | |
| 83 | ||
| 84 | /** | |
| 85 | * {@inheritDoc} | |
| 86 | */ | |
| 87 | public boolean equals(Object that) { | |
| 88 | 24 | return that == this || (that instanceof ConditionalUnaryPredicate<?> |
| 89 | && equals((ConditionalUnaryPredicate<?>) that)); | |
| 90 | } | |
| 91 | ||
| 92 | /** | |
| 93 | * Learn whether another ConditionalUnaryPredicate is equal to this. | |
| 94 | * @param that ConditionalUnaryPredicate to test | |
| 95 | * @return boolean | |
| 96 | */ | |
| 97 | public boolean equals(ConditionalUnaryPredicate<?> that) { | |
| 98 | 18 | return null != that |
| 99 | && (null == ifPred ? null == that.ifPred : ifPred.equals(that.ifPred)) | |
| 100 | && (null == thenPred ? null == that.thenPred : thenPred.equals(that.thenPred)) | |
| 101 | && (null == elsePred ? null == that.elsePred : elsePred.equals(that.elsePred)); | |
| 102 | } | |
| 103 | ||
| 104 | /** | |
| 105 | * {@inheritDoc} | |
| 106 | */ | |
| 107 | public int hashCode() { | |
| 108 | 26 | int hash = "ConditionalUnaryPredicate".hashCode(); |
| 109 | 26 | if (null != ifPred) { |
| 110 | 26 | hash <<= HASH_SHIFT; |
| 111 | 26 | hash ^= ifPred.hashCode(); |
| 112 | } | |
| 113 | 26 | if (null != thenPred) { |
| 114 | 26 | hash <<= HASH_SHIFT; |
| 115 | 26 | hash ^= thenPred.hashCode(); |
| 116 | } | |
| 117 | 26 | if (null != elsePred) { |
| 118 | 26 | hash <<= HASH_SHIFT; |
| 119 | 26 | hash ^= elsePred.hashCode(); |
| 120 | } | |
| 121 | 26 | return hash; |
| 122 | } | |
| 123 | ||
| 124 | /** | |
| 125 | * {@inheritDoc} | |
| 126 | */ | |
| 127 | public String toString() { | |
| 128 | 18 | return "ConditionalUnaryPredicate<" + ifPred + "?" + thenPred + ":" + elsePred + ">"; |
| 129 | } | |
| 130 | ||
| 131 | } |