| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| UnaryNot |
|
| 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.UnaryPredicate; | |
| 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 UnaryNot<A> implements UnaryPredicate<A>, Serializable { | |
| 38 | /** | |
| 39 | * serialVersionUID declaration. | |
| 40 | */ | |
| 41 | private static final long serialVersionUID = -97785102566566058L; | |
| 42 | // attributes | |
| 43 | // ------------------------------------------------------------------------ | |
| 44 | private final UnaryPredicate<? super A> predicate; | |
| 45 | ||
| 46 | // constructor | |
| 47 | // ------------------------------------------------------------------------ | |
| 48 | /** | |
| 49 | * Create a new UnaryNot. | |
| 50 | * @param predicate UnaryPredicate to negate | |
| 51 | */ | |
| 52 | 38 | public UnaryNot(UnaryPredicate<? super A> predicate) { |
| 53 | 38 | if (predicate == null) { |
| 54 | 0 | throw new IllegalArgumentException("UnaryPredicate argument was null"); |
| 55 | } | |
| 56 | 38 | this.predicate = predicate; |
| 57 | 38 | } |
| 58 | ||
| 59 | // predicate interface | |
| 60 | // ------------------------------------------------------------------------ | |
| 61 | /** | |
| 62 | * {@inheritDoc} | |
| 63 | */ | |
| 64 | public boolean test(A obj) { | |
| 65 | 150 | return !(predicate.test(obj)); |
| 66 | } | |
| 67 | ||
| 68 | /** | |
| 69 | * {@inheritDoc} | |
| 70 | */ | |
| 71 | public boolean equals(Object that) { | |
| 72 | 26 | return that == this || (that instanceof UnaryNot<?> && equals((UnaryNot<?>) that)); |
| 73 | } | |
| 74 | ||
| 75 | /** | |
| 76 | * Learn whether another UnaryNot is equal to this. | |
| 77 | * @param that UnaryNot to test | |
| 78 | * @return boolean | |
| 79 | */ | |
| 80 | public boolean equals(UnaryNot<?> 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 = "UnaryNot".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 "UnaryNot<" + predicate + ">"; |
| 100 | } | |
| 101 | ||
| 102 | // static | |
| 103 | // ------------------------------------------------------------------------ | |
| 104 | /** | |
| 105 | * Invert a UnaryPredicate. | |
| 106 | * @param pred UnaryPredicate to invert | |
| 107 | * @return UnaryPredicate<A | |
| 108 | */ | |
| 109 | public static <A> UnaryPredicate<A> not(UnaryPredicate<? super A> pred) { | |
| 110 | 20 | return null == pred ? null : new UnaryNot<A>(pred); |
| 111 | } | |
| 112 | ||
| 113 | } |