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The messaging and data conversion protocol between Java and DolphinDB server

There is a newer version: 1.0.27

package com.xxdb.io;

public class Long2 {
	public long high;
	public long low;
	
	public Long2(long high, long low){
		this.high = high;
		this.low = low;
	}
	
	public boolean isNull(){
		return high==0 && low==0;
	}
	
	public void setNull(){
		high = 0;
		low = 0;
	}
	
	public boolean equals(Object o){
		if(! (o instanceof Long2) || o == null)
			return false;
		else
			return high== ((Long2)o).high && low== ((Long2)o).low;
	}
	
	@Override
	public int hashCode(){
		return (int)(high^low>>>32);
	}
	
	public int hashBucket(int buckets){
		int m = 0x5bd1e995;
		int r = 24;
		int h = 16;

		int k1 = (int)(low & 4294967295l);
		int k2 = (int)(low >>> 32);
		int k3 = (int)(high & 4294967295l);
		int k4 = (int)(high >>> 32);

		k1 *= m;
		k1 ^= k1 >>> r;
		k1 *= m;

		k2 *= m;
		k2 ^= k2 >>> r;
		k2 *= m;

		k3 *= m;
		k3 ^= k3 >>> r;
		k3 *= m;

		k4 *= m;
		k4 ^= k4 >>> r;
		k4 *= m;

		// Mix 4 bytes at a time into the hash
		h *= m;
		h ^= k1;
		h *= m;
		h ^= k2;
		h *= m;
		h ^= k3;
		h *= m;
		h ^= k4;

		// Do a few final mixes of the hash to ensure the last few
		// bytes are well-incorporated.
		h ^= h >>> 13;
		h *= m;
		h ^= h >>> 15;

		if(h>=0)
			return h % buckets;
		else{
			return (int)((4294967296l + h) % buckets);
		}
	}
}