| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| UnaryProcedureUnaryFunction |
|
| 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.UnaryFunction; | |
| 22 | import org.apache.commons.functor.UnaryProcedure; | |
| 23 | ||
| 24 | /** | |
| 25 | * Adapts a | |
| 26 | * {@link UnaryProcedure UnaryProcedure} | |
| 27 | * to the | |
| 28 | * {@link UnaryFunction UnaryFunction} interface | |
| 29 | * by always returning <code>null</code>. | |
| 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 procedure 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 | * @param <T> the returned value type. | |
| 40 | * @version $Revision: 1157657 $ $Date: 2011-08-14 22:28:19 +0200 (Sun, 14 Aug 2011) $ | |
| 41 | * @author Rodney Waldhoff | |
| 42 | */ | |
| 43 | public final class UnaryProcedureUnaryFunction<A, T> implements UnaryFunction<A, T>, Serializable { | |
| 44 | /** | |
| 45 | * serialVersionUID declaration. | |
| 46 | */ | |
| 47 | private static final long serialVersionUID = 6153848695167906659L; | |
| 48 | /** The {@link UnaryProcedure UnaryProcedure} I'm wrapping. */ | |
| 49 | private final UnaryProcedure<? super A> procedure; | |
| 50 | ||
| 51 | /** | |
| 52 | * Create a new UnaryProcedureUnaryFunction. | |
| 53 | * @param procedure to adapt | |
| 54 | */ | |
| 55 | 28 | public UnaryProcedureUnaryFunction(UnaryProcedure<? super A> procedure) { |
| 56 | 28 | if (procedure == null) { |
| 57 | 0 | throw new IllegalArgumentException("UnaryProcedure argument was null"); |
| 58 | } | |
| 59 | 28 | this.procedure = procedure; |
| 60 | 28 | } |
| 61 | ||
| 62 | /** | |
| 63 | * {@inheritDoc} | |
| 64 | */ | |
| 65 | public T evaluate(A obj) { | |
| 66 | 2 | procedure.run(obj); |
| 67 | 2 | return null; |
| 68 | } | |
| 69 | ||
| 70 | /** | |
| 71 | * {@inheritDoc} | |
| 72 | */ | |
| 73 | public boolean equals(Object that) { | |
| 74 | 30 | return that == this || (that instanceof UnaryProcedureUnaryFunction<?, ?> |
| 75 | && equals((UnaryProcedureUnaryFunction<?, ?>) that)); | |
| 76 | } | |
| 77 | ||
| 78 | /** | |
| 79 | * Learn whether a given UnaryProcedureUnaryFunction is equal to this. | |
| 80 | * @param that UnaryProcedureUnaryFunction to test | |
| 81 | * @return boolean | |
| 82 | */ | |
| 83 | public boolean equals(UnaryProcedureUnaryFunction<?, ?> that) { | |
| 84 | 20 | return null != that && (null == procedure ? null == that.procedure : procedure.equals(that.procedure)); |
| 85 | } | |
| 86 | ||
| 87 | /** | |
| 88 | * {@inheritDoc} | |
| 89 | */ | |
| 90 | public int hashCode() { | |
| 91 | 40 | int hash = "UnaryProcedureUnaryFunction".hashCode(); |
| 92 | 40 | if (null != procedure) { |
| 93 | 40 | hash ^= procedure.hashCode(); |
| 94 | } | |
| 95 | 40 | return hash; |
| 96 | } | |
| 97 | ||
| 98 | /** | |
| 99 | * {@inheritDoc} | |
| 100 | */ | |
| 101 | public String toString() { | |
| 102 | 24 | return "UnaryProcedureUnaryFunction<" + procedure + ">"; |
| 103 | } | |
| 104 | ||
| 105 | /** | |
| 106 | * Adapt a UnaryProcedure to the UnaryFunction interface. | |
| 107 | * @param <A> the argument type. | |
| 108 | * @param <T> the returned value type. | |
| 109 | * @param procedure to adapt | |
| 110 | * @return UnaryProcedureUnaryFunction | |
| 111 | */ | |
| 112 | public static <A, T> UnaryProcedureUnaryFunction<A, T> adapt(UnaryProcedure<? super A> procedure) { | |
| 113 | 2 | return null == procedure ? null : new UnaryProcedureUnaryFunction<A, T>(procedure); |
| 114 | } | |
| 115 | ||
| 116 | } |