| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| PredicateUnaryPredicate |
|
| 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.Predicate; | |
| 22 | import org.apache.commons.functor.UnaryPredicate; | |
| 23 | ||
| 24 | /** | |
| 25 | * Adapts a | |
| 26 | * {@link Predicate Predicate} | |
| 27 | * to the | |
| 28 | * {@link UnaryPredicate UnaryPredicate} interface | |
| 29 | * by ignoring the given 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 <A> the argument type. | |
| 39 | * @version $Revision: 1157628 $ $Date: 2011-08-14 22:04:52 +0200 (Sun, 14 Aug 2011) $ | |
| 40 | * @author Rodney Waldhoff | |
| 41 | */ | |
| 42 | public final class PredicateUnaryPredicate<A> implements UnaryPredicate<A>, Serializable { | |
| 43 | /** | |
| 44 | * serialVersionUID declaration. | |
| 45 | */ | |
| 46 | private static final long serialVersionUID = -5168896606842881702L; | |
| 47 | /** The {@link Predicate Predicate} I'm wrapping. */ | |
| 48 | private final Predicate predicate; | |
| 49 | ||
| 50 | /** | |
| 51 | * Create a new PredicateUnaryPredicate. | |
| 52 | * @param predicate to adapt | |
| 53 | */ | |
| 54 | 18 | public PredicateUnaryPredicate(Predicate predicate) { |
| 55 | 18 | if (predicate == null) { |
| 56 | 0 | throw new IllegalArgumentException("Predicate argument was null"); |
| 57 | } | |
| 58 | 18 | this.predicate = predicate; |
| 59 | 18 | } |
| 60 | ||
| 61 | /** | |
| 62 | * {@inheritDoc} | |
| 63 | */ | |
| 64 | public boolean test(Object obj) { | |
| 65 | 2 | return predicate.test(); |
| 66 | } | |
| 67 | ||
| 68 | /** | |
| 69 | * {@inheritDoc} | |
| 70 | */ | |
| 71 | public boolean equals(Object that) { | |
| 72 | 24 | return that == this || (that instanceof PredicateUnaryPredicate<?> |
| 73 | && equals((PredicateUnaryPredicate<?>) that)); | |
| 74 | } | |
| 75 | ||
| 76 | /** | |
| 77 | * Learn whether a given PredicateUnaryPredicate is equal to this. | |
| 78 | * @param that PredicateUnaryPredicate to test | |
| 79 | * @return boolean | |
| 80 | */ | |
| 81 | public boolean equals(PredicateUnaryPredicate<?> 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 = "PredicateUnaryPredicate".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 "PredicateUnaryPredicate<" + predicate + ">"; |
| 101 | } | |
| 102 | ||
| 103 | /** | |
| 104 | * Adapt a Predicate to the UnaryPredicate interface. | |
| 105 | * @param <A> the argument type. | |
| 106 | * @param predicate to adapt | |
| 107 | * @return PredicateUnaryPredicate<A> | |
| 108 | */ | |
| 109 | public static <A> PredicateUnaryPredicate<A> adapt(Predicate predicate) { | |
| 110 | 4 | return null == predicate ? null : new PredicateUnaryPredicate<A>(predicate); |
| 111 | } | |
| 112 | ||
| 113 | } |