HashFunction

HashFunction.java

private static class HashFunction {

        private long prime;
        private long odd;

        public HashFunction(final long prime, final long odd) {
            this.prime = prime;
            this.odd = odd;
        }

        public int getHashValue(final Character character) {
            int hash = character.hashCode();
            if (hash < 0) {
                hash = Math.abs(hash);
            }
            return calculateHash(hash, prime, odd);
        }

        private int calculateHash(final int hash, final long prime, final long odd) {
            return (int)((((hash % LIMIT) * prime) % LIMIT) * odd) % LIMIT;
        }

    }