zserio.tools

Class HashUtil

java.lang.Object

zserio.tools.HashUtil

public final class HashUtil
extends java.lang.Object

Collected methods which allow easy implementation of hashCode method. Only native types and Object types are supported so far. Usage:

 public int hashCode()
 {
     int result = HashUtil.HASH_SEED;

     // collect the contributions of various fields
     result = HashUtil.hash(result, nativeType);
     result = HashUtil.hash(result, objectType);

     return result;
 }
 

Field Summary

Fields

Modifier and Type	Field and Description
static int	HASH_SEED Hash seed number to be used for initialization.

Constructor Summary

Constructors

Constructor and Description
HashUtil()

Method Summary

Modifier and Type	Method and Description
static int	hash(int seedValue, boolean booleanValue) Creates a hash value of the given seed value and the given boolean value.
static int	hash(int seedValue, char charValue) Creates a hash value of the given seed value and the given char value.
static int	hash(int seedValue, double doubleValue) Creates a hash value of the given seed value and the given double value.
static int	hash(int seedValue, float floatValue) Creates a hash value of the given seed value and the given float value.
static int	hash(int seedValue, int intValue) Creates a hash value of the given seed value and the given integer value.
static int	hash(int seedValue, long longValue) Creates a hash value of the given seed value and the given long value.
static int	hash(int seedValue, java.lang.Object objectType) Creates a hash value of the given seed value and the given object.

Methods inherited from class java.lang.Object

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

Field Detail

HASH_SEED

public static final int HASH_SEED

Hash seed number to be used for initialization.

See Also:

Constant Field Values

Constructor Detail

HashUtil

public HashUtil()

Method Detail

hash

public static int hash(int seedValue,
                       boolean booleanValue)

Creates a hash value of the given seed value and the given boolean value.

Parameters:

seedValue - The seed value to use for calculation.

booleanValue - The boolean value to use for calculation.

Returns:

The calculated hash value.

hash

public static int hash(int seedValue,
                       char charValue)

Creates a hash value of the given seed value and the given char value.

Parameters:

seedValue - The seed value to use for calculation.

charValue - The char value to use for calculation.

Returns:

The calculated hash value.

hash

public static int hash(int seedValue,
                       int intValue)

Creates a hash value of the given seed value and the given integer value.

Parameters:

seedValue - The seed value to use for calculation.

intValue - The integer value to use for calculation.

Returns:

The calculated hash value.

hash

public static int hash(int seedValue,
                       long longValue)

Creates a hash value of the given seed value and the given long value.

Parameters:

seedValue - The seed value to use for calculation.

longValue - The long value to use for calculation.

Returns:

The calculated hash value.

hash

public static int hash(int seedValue,
                       float floatValue)

Creates a hash value of the given seed value and the given float value.

Parameters:

seedValue - The seed value to use for calculation.

floatValue - The float value to use for calculation.

Returns:

The calculated hash value.

hash

public static int hash(int seedValue,
                       double doubleValue)

Creates a hash value of the given seed value and the given double value.

Parameters:

seedValue - The seed value to use for calculation.

doubleValue - The double value to use for calculation.

Returns:

The calculated hash value.

hash

public static int hash(int seedValue,
                       java.lang.Object objectType)

Creates a hash value of the given seed value and the given object.

Parameters:

seedValue - The seed value to use for calculation.

objectType - The object to use for calculation.

Returns:

The calculated hash value.