LangUtils.java revision d42abb2fd917184764daf22f5f299e848b8701d7 
1/*
2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/util/LangUtils.java $
3 * $Revision: 503413 $
4 * $Date: 2007-02-04 06:22:14 -0800 (Sun, 04 Feb 2007) $
5 *
6 * ====================================================================
7 * Licensed to the Apache Software Foundation (ASF) under one
8 * or more contributor license agreements.  See the NOTICE file
9 * distributed with this work for additional information
10 * regarding copyright ownership.  The ASF licenses this file
11 * to you under the Apache License, Version 2.0 (the
12 * "License"); you may not use this file except in compliance
13 * with the License.  You may obtain a copy of the License at
14 *
15 *   http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing,
18 * software distributed under the License is distributed on an
19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 * KIND, either express or implied.  See the License for the
21 * specific language governing permissions and limitations
22 * under the License.
23 * ====================================================================
24 *
25 * This software consists of voluntary contributions made by many
26 * individuals on behalf of the Apache Software Foundation.  For more
27 * information on the Apache Software Foundation, please see
28 * <http://www.apache.org/>.
29 *
30 */
31
32package org.apache.http.util;
33
34/**
35 * A set of utility methods to help produce consistent
36 * {@link Object#equals equals} and {@link Object#hashCode hashCode} methods.
37 *
38 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
39 *
40 * @since 4.0
41 *
42 * @deprecated Please use {@link java.net.URL#openConnection} instead.
43 *     Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a>
44 *     for further details.
45 */
46@Deprecated
47public final class LangUtils {
48
49    public static final int HASH_SEED = 17;
50    public static final int HASH_OFFSET = 37;
51
52    /** Disabled default constructor. */
53    private LangUtils() {
54    }
55
56    public static int hashCode(final int seed, final int hashcode) {
57        return seed * HASH_OFFSET + hashcode;
58    }
59
60    public static int hashCode(final int seed, final boolean b) {
61        return hashCode(seed, b ? 1 : 0);
62    }
63
64    public static int hashCode(final int seed, final Object obj) {
65        return hashCode(seed, obj != null ? obj.hashCode() : 0);
66    }
67
68    public static boolean equals(final Object obj1, final Object obj2) {
69        return obj1 == null ? obj2 == null : obj1.equals(obj2);
70    }
71
72    public static boolean equals(final Object[] a1, final Object[] a2) {
73        if (a1 == null) {
74            if (a2 == null) {
75                return true;
76            } else {
77                return false;
78            }
79        } else {
80            if (a2 != null && a1.length == a2.length) {
81                for (int i = 0; i < a1.length; i++) {
82                    if (!equals(a1[i], a2[i])) {
83                        return false;
84                    }
85                }
86                return true;
87            } else {
88                return false;
89            }
90        }
91    }
92
93}
94