com.rapplogic.xbee.util.DoubleByte Maven / Gradle / Ivy

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/**
 * Copyright (c) 2008 Andrew Rapp. All rights reserved.
 *  
 * This file is part of XBee-API.
 *  
 * XBee-API is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *  
 * XBee-API is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *  
 * You should have received a copy of the GNU General Public License
 * along with XBee-API.  If not, see .
 */

package com.rapplogic.xbee.util;

public class DoubleByte {
	
	private int msb;
	private int lsb;
	
	public DoubleByte() {
		
	}
	
	/**
	 * Decomposes a 16bit int into high and low bytes
	 * 
	 * @param val
	 */
	public DoubleByte(int val) {
		if (val > 0xFFFF || val < 0) {
			throw new IllegalArgumentException("value is out of range");
		}
		
		// split address into high and low bytes
		msb = val >> 8;
		lsb = val & 0xFF;
	}

	/**
	 * Constructs a 16bit value from two bytes (high and low)
	 * 
	 * @param msb
	 * @param lsb
	 */
	public DoubleByte(int msb, int lsb) {
		
		if (msb > 0xFF || lsb > 0xFF) {
			throw new IllegalArgumentException("msb or lsb are out of range");
		}

		this.msb = msb;
		this.lsb = lsb;
	}
	
	public int getMsb() {
		return msb;
	}

	public int getLsb() {
		return lsb;
	}	
	
	public int get16BitValue() {
		return (this.msb << 8) + this.lsb;
	}

	public void setMsb(int msb) {
		this.msb = msb;
	}

	public void setLsb(int lsb) {
		this.lsb = lsb;
	}
	
	public int[] getArray() {
		return new int[] { this.msb, this.lsb };
	}

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        DoubleByte that = (DoubleByte) o;

        if (lsb != that.lsb) return false;
        if (msb != that.msb) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = msb;
        result = 31 * result + lsb;
        return result;
    }
}