/lib/src/org/apache/http/util/LangUtils.java

http://github.com/onedanshow/Screen-Courter · Java · 83 lines · 39 code · 10 blank · 34 comment · 16 complexity · e5935955c76178ce0daae7c0493bdf3e MD5 · raw file 

    

  1. /*

    2. 

  2.  * ====================================================================

    3. 

  3.  * Licensed to the Apache Software Foundation (ASF) under one

    4. 

  4.  * or more contributor license agreements.  See the NOTICE file

    5. 

  5.  * distributed with this work for additional information

    6. 

  6.  * regarding copyright ownership.  The ASF licenses this file

    7. 

  7.  * to you under the Apache License, Version 2.0 (the

    8. 

  8.  * "License"); you may not use this file except in compliance

    9. 

  9.  * with the License.  You may obtain a copy of the License at

    10. 

  10.  *

    11. 

  11.  *   http://www.apache.org/licenses/LICENSE-2.0

    12. 

  12.  *

    13. 

  13.  * Unless required by applicable law or agreed to in writing,

    14. 

  14.  * software distributed under the License is distributed on an

    15. 

  15.  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

    16. 

  16.  * KIND, either express or implied.  See the License for the

    17. 

  17.  * specific language governing permissions and limitations

    18. 

  18.  * under the License.

    19. 

  19.  * ====================================================================

    20. 

  20.  *

    21. 

  21.  * This software consists of voluntary contributions made by many

    22. 

  22.  * individuals on behalf of the Apache Software Foundation.  For more

    23. 

  23.  * information on the Apache Software Foundation, please see

    24. 

  24.  * <http://www.apache.org/>.

    25. 

  25.  *

    26. 

  26.  */

    27. 

  27. 

    28. 

  28. package org.apache.http.util;

    29. 

  29. 

    30. 

  30. /**

    31. 

  31.  * A set of utility methods to help produce consistent

    32. 

  32.  * {@link Object#equals equals} and {@link Object#hashCode hashCode} methods.

    33. 

  33.  *  

    34. 

  34.  * 

    35. 

  35.  * @since 4.0

    36. 

  36.  */

    37. 

  37. public final class LangUtils {

    38. 

  38.     

    39. 

  39.     public static final int HASH_SEED = 17;

    40. 

  40.     public static final int HASH_OFFSET = 37;

    41. 

  41. 

    42. 

  42.     /** Disabled default constructor. */

    43. 

  43.     private LangUtils() {

    44. 

  44.     }

    45. 

  45. 

    46. 

  46.     public static int hashCode(final int seed, final int hashcode) {

    47. 

  47.         return seed * HASH_OFFSET + hashcode;

    48. 

  48.     }

    49. 

  49. 

    50. 

  50.     public static int hashCode(final int seed, final boolean b) {

    51. 

  51.         return hashCode(seed, b ? 1 : 0);

    52. 

  52.     }

    53. 

  53.     

    54. 

  54.     public static int hashCode(final int seed, final Object obj) {

    55. 

  55.         return hashCode(seed, obj != null ? obj.hashCode() : 0);

    56. 

  56.     }

    57. 

  57.     

    58. 

  58.     public static boolean equals(final Object obj1, final Object obj2) {

    59. 

  59.         return obj1 == null ? obj2 == null : obj1.equals(obj2);

    60. 

  60.     }

    61. 

  61. 

    62. 

  62.     public static boolean equals(final Object[] a1, final Object[] a2) {

    63. 

  63.         if (a1 == null) {

    64. 

  64.             if (a2 == null) {

    65. 

  65.                 return true;

    66. 

  66.             } else {

    67. 

  67.                 return false;

    68. 

  68.             }

    69. 

  69.         } else {

    70. 

  70.             if (a2 != null && a1.length == a2.length) {

    71. 

  71.                 for (int i = 0; i < a1.length; i++) {

    72. 

  72.                     if (!equals(a1[i], a2[i])) {

    73. 

  73.                         return false;

    74. 

  74.                     }

    75. 

  75.                 }

    76. 

  76.                 return true;

    77. 

  77.             } else {

    78. 

  78.                 return false;

    79. 

  79.             }

    80. 

  80.         }

    81. 

  81.     }

    82. 

  82.     

    83. 

  83. }
    84.