Package net.morimekta.util

Class StrongHashBuilder

java.lang.Object

net.morimekta.util.StrongHashBuilder

public class StrongHashBuilder
extends java.lang.Object

Helper for making strong hash values. The hash output is 64bit int calculated from a base of large prime numbers. Note that this may be significantly more process intensive than ordinary hash.

Constructor Summary

Constructors

Constructor	Description
StrongHashBuilder()	Create a strong hash builder.
StrongHashBuilder(long initialValue, long valueMultiplier)	Create a strong hash builder.

Method Summary

Modifier and Type	Method	Description
StrongHashBuilder	add(boolean b)
StrongHashBuilder	add(boolean[] arr)
StrongHashBuilder	add(byte b)
StrongHashBuilder	add(byte[] arr)
StrongHashBuilder	add(char b)
StrongHashBuilder	add(char[] arr)
StrongHashBuilder	add(double b)
StrongHashBuilder	add(double[] arr)
StrongHashBuilder	add(float b)
StrongHashBuilder	add(float[] arr)
StrongHashBuilder	add(int b)
StrongHashBuilder	add(int[] arr)
StrongHashBuilder	add(long b)
StrongHashBuilder	add(long[] arr)
StrongHashBuilder	add(short b)
StrongHashBuilder	add(short[] arr)
StrongHashBuilder	add(java.lang.CharSequence c)
StrongHashBuilder	add(java.lang.Object o)
StrongHashBuilder	add(java.util.Collection c)
StrongHashBuilder	add(java.util.Map map)
StrongHashBuilder	add(StrongHashable o)
<T> StrongHashBuilder	add(T[] arr)
long	strongHash()

Methods inherited from class java.lang.Object

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

Constructor Detail

StrongHashBuilder

public StrongHashBuilder()

Create a strong hash builder.

StrongHashBuilder

public StrongHashBuilder(long initialValue,
                         long valueMultiplier)

Create a strong hash builder.

Parameters:

initialValue - The initial value. Recommended to be at least a 5-digit prime. This is the hash value if no data is inserted.

valueMultiplier - The value multiplier. This should be a prime number no less than 2^60.

Method Detail

add

public StrongHashBuilder add(boolean b)

add

public StrongHashBuilder add(byte b)

add

public StrongHashBuilder add(short b)

add

public StrongHashBuilder add(int b)

add

public StrongHashBuilder add(long b)

add

public StrongHashBuilder add(char b)

add

public StrongHashBuilder add(double b)

add

public StrongHashBuilder add(float b)

add

public StrongHashBuilder add(boolean[] arr)

add

public StrongHashBuilder add(byte[] arr)

add

public StrongHashBuilder add(short[] arr)

add

public StrongHashBuilder add(int[] arr)

add

public StrongHashBuilder add(long[] arr)

add

public StrongHashBuilder add(char[] arr)

add

public StrongHashBuilder add(float[] arr)

add

public StrongHashBuilder add(double[] arr)

add

public <T> StrongHashBuilder add(T[] arr)

add

public StrongHashBuilder add(java.lang.CharSequence c)

add

public StrongHashBuilder add(StrongHashable o)

add

public StrongHashBuilder add(java.util.Collection c)

add

public StrongHashBuilder add(java.util.Map map)

add

public StrongHashBuilder add(java.lang.Object o)

strongHash

public long strongHash()