| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| Size |
|
| 2.111111111111111;2.111 |
| 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.collection; | |
| 18 | ||
| 19 | import java.io.Serializable; | |
| 20 | import java.lang.reflect.Array; | |
| 21 | import java.util.Collection; | |
| 22 | ||
| 23 | import org.apache.commons.functor.UnaryFunction; | |
| 24 | ||
| 25 | /** | |
| 26 | * Returns the size of the specified Collection, or the length | |
| 27 | * of the specified array or String. | |
| 28 | * @version $Revision: 1166334 $ $Date: 2011-09-07 21:37:49 +0200 (Wed, 07 Sep 2011) $ | |
| 29 | * @author Rodney Waldhoff | |
| 30 | */ | |
| 31 | 108 | public final class Size<A> implements UnaryFunction<A, Integer>, Serializable { |
| 32 | ||
| 33 | /** | |
| 34 | * serialVersionUID declaration. | |
| 35 | */ | |
| 36 | private static final long serialVersionUID = -12374650738412129L; | |
| 37 | 2 | private static final Size<Object> INSTANCE = new Size<Object>(); |
| 38 | ||
| 39 | // constructor | |
| 40 | // ------------------------------------------------------------------------ | |
| 41 | /** | |
| 42 | * Create a new Size. | |
| 43 | */ | |
| 44 | 18 | public Size() { } |
| 45 | ||
| 46 | /** | |
| 47 | * {@inheritDoc} | |
| 48 | */ | |
| 49 | public Integer evaluate(Object obj) { | |
| 50 | 142 | if (obj instanceof Collection<?>) { |
| 51 | 24 | return evaluate((Collection<?>) obj); |
| 52 | } | |
| 53 | 118 | if (obj instanceof String) { |
| 54 | 110 | return evaluate((String) obj); |
| 55 | } | |
| 56 | 8 | if (null != obj && obj.getClass().isArray()) { |
| 57 | 4 | return evaluateArray(obj); |
| 58 | } | |
| 59 | 4 | if (null == obj) { |
| 60 | 2 | throw new IllegalArgumentException("Argument must not be null"); |
| 61 | } | |
| 62 | 2 | throw new IllegalArgumentException("Expected Collection, String or Array, found " + obj); |
| 63 | } | |
| 64 | ||
| 65 | /** | |
| 66 | * {@inheritDoc} | |
| 67 | */ | |
| 68 | public boolean equals(Object that) { | |
| 69 | 24 | return that instanceof Size<?>; |
| 70 | } | |
| 71 | ||
| 72 | /** | |
| 73 | * {@inheritDoc} | |
| 74 | */ | |
| 75 | public int hashCode() { | |
| 76 | 24 | return "Size".hashCode(); |
| 77 | } | |
| 78 | ||
| 79 | /** | |
| 80 | * {@inheritDoc} | |
| 81 | */ | |
| 82 | public String toString() { | |
| 83 | 16 | return "Size()"; |
| 84 | } | |
| 85 | ||
| 86 | /** | |
| 87 | * Get a Size instance. | |
| 88 | * @return Size | |
| 89 | */ | |
| 90 | public static Size<Object> instance() { | |
| 91 | 48 | return INSTANCE; |
| 92 | } | |
| 93 | ||
| 94 | /** | |
| 95 | * Evaluate a Collection. | |
| 96 | * @param col to evaluate | |
| 97 | * @return Integer | |
| 98 | */ | |
| 99 | private int evaluate(Collection<?> col) { | |
| 100 | 24 | return col.size(); |
| 101 | } | |
| 102 | ||
| 103 | /** | |
| 104 | * Evaluate a String. | |
| 105 | * @param str to evaluate | |
| 106 | * @return Integer | |
| 107 | */ | |
| 108 | private int evaluate(String str) { | |
| 109 | 110 | return str.length(); |
| 110 | } | |
| 111 | ||
| 112 | /** | |
| 113 | * Evaluate an array. | |
| 114 | * @param array to evaluate | |
| 115 | * @return Integer | |
| 116 | */ | |
| 117 | private int evaluateArray(Object array) { | |
| 118 | 4 | return Array.getLength(array); |
| 119 | } | |
| 120 | ||
| 121 | } |