com.oracle.common.base

Interface Hasher<V>

All Known Implementing Classes:

IdentityHasher, NaturalHasher

public interface Hasher<V>

A Hasher provides an external means for producing hash codes and comparing objects for equality.

Author:

mf 2011.01.07

Method Summary

Modifier and Type	Method and Description
boolean	equals(V va, V vb) Compare two objects for equality.
int	hashCode(V v) Return a hash for the specified object.
static int	mod(int n, int m) Calculate a modulo of two integer numbers.
static long	mod(long n, long m) Calculate a modulo of two long numbers.

Method Detail

hashCode

int hashCode(V v)

Return a hash for the specified object.

Parameters:

v - the object to hash

Returns:

the hash

equals

boolean equals(V va,
               V vb)

Compare two objects for equality.

Parameters:

va - the first object to compare

vb - the second object to compare

Returns:

true iff the object are equal

mod

static int mod(int n,
               int m)

Calculate a modulo of two integer numbers. For a positive dividend the result is the same as the Java remainder operation (n % m). For a negative dividend the result is still positive and equals to (n % m + m).

Parameters:

n - the dividend

m - the divisor (must be positive)

Returns:

the modulo

mod

static long mod(long n,
                long m)

Calculate a modulo of two long numbers. For a positive dividend the result is the same as the Java remainder operation (n % m). For a negative dividend the result is still positive and equals to (n % m + m).

Parameters:

n - the dividend

m - the divisor (must be positive)

Returns:

the modulo