Package org.codehaus.groovy.util

Class HashCodeHelper

java.lang.Object
org.codehaus.groovy.util.HashCodeHelper
public class HashCodeHelper extends Object
A utility class to help calculate hashcode values using an algorithm similar to that outlined in "Effective Java, Joshua Bloch, 2nd Edition".

  • Constructor Summary

    Constructors
    Constructor
    Description
    HashCodeHelper()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static int
    initHash()
    Returns the initial seed for a hash-code calculation sequence.
    static int
    updateHash(int current, boolean var)
    Mixes a boolean value into an in-progress hash code.
    static int
    updateHash(int current, boolean[] var)
    Mixes a boolean-array value into an in-progress hash code.
    static int
    updateHash(int current, byte[] var)
    Mixes a byte-array value into an in-progress hash code.
    static int
    updateHash(int current, char var)
    Mixes a character value into an in-progress hash code.
    static int
    updateHash(int current, char[] var)
    Mixes a char-array value into an in-progress hash code.
    static int
    updateHash(int current, double var)
    Mixes a double value into an in-progress hash code.
    static int
    updateHash(int current, double[] var)
    Mixes a double-array value into an in-progress hash code.
    static int
    updateHash(int current, float var)
    Mixes a float value into an in-progress hash code.
    static int
    updateHash(int current, float[] var)
    Mixes a float-array value into an in-progress hash code.
    static int
    updateHash(int current, int var)
    Mixes an integer value into an in-progress hash code.
    static int
    updateHash(int current, int[] var)
    Mixes an int-array value into an in-progress hash code.
    static int
    updateHash(int current, long var)
    Mixes a long value into an in-progress hash code.
    static int
    updateHash(int current, long[] var)
    Mixes a long-array value into an in-progress hash code.
    static int
    updateHash(int current, short[] var)
    Mixes a short-array value into an in-progress hash code.
    static int
    updateHash(int current, Character var)
    Mixes a boxed character value into an in-progress hash code.
    static int
    updateHash(int current, Double var)
    Mixes a boxed double value into an in-progress hash code.
    static int
    updateHash(int current, Float var)
    Mixes a boxed float value into an in-progress hash code.
    static int
    updateHash(int current, Integer var)
    Mixes a boxed integer value into an in-progress hash code.
    static int
    updateHash(int current, Long var)
    Mixes a boxed long value into an in-progress hash code.
    static int
    updateHash(int current, Object var)
    Mixes an object or object-array value into an in-progress hash code.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • HashCodeHelper

      public HashCodeHelper()

  • Method Details

    • initHash

      public static int initHash()
      Returns the initial seed for a hash-code calculation sequence.
      Returns:
      the starting hash value

    • updateHash

      public static int updateHash(int current, boolean var)
      Mixes a boolean value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, char var)
      Mixes a character value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, Character var)
      Mixes a boxed character value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, int var)
      Mixes an integer value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, Integer var)
      Mixes a boxed integer value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, long var)
      Mixes a long value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, Long var)
      Mixes a boxed long value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, float var)
      Mixes a float value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, Float var)
      Mixes a boxed float value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, double var)
      Mixes a double value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, Double var)
      Mixes a boxed double value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, Object var)
      Mixes an object or object-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, boolean[] var)
      Mixes a boolean-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, char[] var)
      Mixes a char-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, byte[] var)
      Mixes a byte-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, short[] var)
      Mixes a short-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, int[] var)
      Mixes an int-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, long[] var)
      Mixes a long-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, float[] var)
      Mixes a float-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value

    • updateHash

      public static int updateHash(int current, double[] var)
      Mixes a double-array value into an in-progress hash code.
      Parameters:
      current - the current hash value
      var - the value to mix in
      Returns:
      the updated hash value