mobile/android/thirdparty/ch/boye/httpclientandroidlib/util/LangUtils.java@fc2d59ddac77 (annotated)
mobile/android/thirdparty/ch/boye/httpclientandroidlib/util/LangUtils.java
Wed, 31 Dec 2014 07:22:50 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 07:22:50 +0100
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
- permissions
- -rw-r--r--
Correct previous dual key logic pending first delivery installment.
| michael@0 | 1 | /* |
| michael@0 | 2 | * ==================================================================== |
| michael@0 | 3 | * Licensed to the Apache Software Foundation (ASF) under one |
| michael@0 | 4 | * or more contributor license agreements. See the NOTICE file |
| michael@0 | 5 | * distributed with this work for additional information |
| michael@0 | 6 | * regarding copyright ownership. The ASF licenses this file |
| michael@0 | 7 | * to you under the Apache License, Version 2.0 (the |
| michael@0 | 8 | * "License"); you may not use this file except in compliance |
| michael@0 | 9 | * with the License. You may obtain a copy of the License at |
| michael@0 | 10 | * |
| michael@0 | 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| michael@0 | 12 | * |
| michael@0 | 13 | * Unless required by applicable law or agreed to in writing, |
| michael@0 | 14 | * software distributed under the License is distributed on an |
| michael@0 | 15 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| michael@0 | 16 | * KIND, either express or implied. See the License for the |
| michael@0 | 17 | * specific language governing permissions and limitations |
| michael@0 | 18 | * under the License. |
| michael@0 | 19 | * ==================================================================== |
| michael@0 | 20 | * |
| michael@0 | 21 | * This software consists of voluntary contributions made by many |
| michael@0 | 22 | * individuals on behalf of the Apache Software Foundation. For more |
| michael@0 | 23 | * information on the Apache Software Foundation, please see |
| michael@0 | 24 | * <http://www.apache.org/>. |
| michael@0 | 25 | * |
| michael@0 | 26 | */ |
| michael@0 | 27 | |
| michael@0 | 28 | package ch.boye.httpclientandroidlib.util; |
| michael@0 | 29 | |
| michael@0 | 30 | /** |
| michael@0 | 31 | * A set of utility methods to help produce consistent |
| michael@0 | 32 | * {@link Object#equals equals} and {@link Object#hashCode hashCode} methods. |
| michael@0 | 33 | * |
| michael@0 | 34 | * |
| michael@0 | 35 | * @since 4.0 |
| michael@0 | 36 | */ |
| michael@0 | 37 | public final class LangUtils { |
| michael@0 | 38 | |
| michael@0 | 39 | public static final int HASH_SEED = 17; |
| michael@0 | 40 | public static final int HASH_OFFSET = 37; |
| michael@0 | 41 | |
| michael@0 | 42 | /** Disabled default constructor. */ |
| michael@0 | 43 | private LangUtils() { |
| michael@0 | 44 | } |
| michael@0 | 45 | |
| michael@0 | 46 | public static int hashCode(final int seed, final int hashcode) { |
| michael@0 | 47 | return seed * HASH_OFFSET + hashcode; |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | public static int hashCode(final int seed, final boolean b) { |
| michael@0 | 51 | return hashCode(seed, b ? 1 : 0); |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | public static int hashCode(final int seed, final Object obj) { |
| michael@0 | 55 | return hashCode(seed, obj != null ? obj.hashCode() : 0); |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | /** |
| michael@0 | 59 | * Check if two objects are equal. |
| michael@0 | 60 | * |
| michael@0 | 61 | * @param obj1 first object to compare, may be {@code null} |
| michael@0 | 62 | * @param obj2 second object to compare, may be {@code null} |
| michael@0 | 63 | * @return {@code true} if the objects are equal or both null |
| michael@0 | 64 | */ |
| michael@0 | 65 | public static boolean equals(final Object obj1, final Object obj2) { |
| michael@0 | 66 | return obj1 == null ? obj2 == null : obj1.equals(obj2); |
| michael@0 | 67 | } |
| michael@0 | 68 | |
| michael@0 | 69 | /** |
| michael@0 | 70 | * Check if two object arrays are equal. |
| michael@0 | 71 | * <p> |
| michael@0 | 72 | * <ul> |
| michael@0 | 73 | * <li>If both parameters are null, return {@code true}</li> |
| michael@0 | 74 | * <li>If one parameter is null, return {@code false}</li> |
| michael@0 | 75 | * <li>If the array lengths are different, return {@code false}</li> |
| michael@0 | 76 | * <li>Compare array elements using .equals(); return {@code false} if any comparisons fail.</li> |
| michael@0 | 77 | * <li>Return {@code true}</li> |
| michael@0 | 78 | * </ul> |
| michael@0 | 79 | * |
| michael@0 | 80 | * @param a1 first array to compare, may be {@code null} |
| michael@0 | 81 | * @param a2 second array to compare, may be {@code null} |
| michael@0 | 82 | * @return {@code true} if the arrays are equal or both null |
| michael@0 | 83 | */ |
| michael@0 | 84 | public static boolean equals(final Object[] a1, final Object[] a2) { |
| michael@0 | 85 | if (a1 == null) { |
| michael@0 | 86 | if (a2 == null) { |
| michael@0 | 87 | return true; |
| michael@0 | 88 | } else { |
| michael@0 | 89 | return false; |
| michael@0 | 90 | } |
| michael@0 | 91 | } else { |
| michael@0 | 92 | if (a2 != null && a1.length == a2.length) { |
| michael@0 | 93 | for (int i = 0; i < a1.length; i++) { |
| michael@0 | 94 | if (!equals(a1[i], a2[i])) { |
| michael@0 | 95 | return false; |
| michael@0 | 96 | } |
| michael@0 | 97 | } |
| michael@0 | 98 | return true; |
| michael@0 | 99 | } else { |
| michael@0 | 100 | return false; |
| michael@0 | 101 | } |
| michael@0 | 102 | } |
| michael@0 | 103 | } |
| michael@0 | 104 | |
| michael@0 | 105 | } |
