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      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 
     32 package 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
     47 public 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