GGA.java

package com.buglabs.nmea2;

import com.buglabs.nmea.Time;
import com.buglabs.nmea.sentences.NMEAParserException;

/**
 * Stores GGA type NMEA sentence data
 * 
 * @author kgilmer
 * 
 */
public final class GGA extends AbstractNMEASentence {

	/**
	 * Time 170834 17:08:34 Z Latitude 4124.8963, N 41d 24.8963' N or 41d 24'
	 * 54" N Longitude 08151.6838, W 81d 51.6838' W or 81d 51' 41" W Fix
	 * Quality: Number of Satellites 05 5 Satellites are in view Horizontal
	 * Dilution of Precision (HDOP) 1.5 Relative accuracy of horizontal position
	 * Altitude 280.2, M 280.2 meters above mean sea level Height of geoid above
	 * WGS84 ellipsoid -34.0, M -34.0 meters Time since last DGPS update blank
	 * No last update DGPS reference station id blank No station id Checksum *75
	 * Used by program to check for transmission errors
	 */

	private Time time;
	private String latitude;
	private String longitude;
	private int fixQuality;
	private int numOfSatellites;
	private float precision;
	private double altitude;
	private char unitOfAltitude;
	private double geoidHeight;
	private char unitOfGeoidHeight;

	protected GGA(String sentence) {
		super(sentence);
	}

	protected void initialize() {
		precision = (float) -1.0;
	}

	protected void parseField(int index, String field, String fields[]) {
		try {
			switch (index) {
			case 1:
				time = new Time(field);
				break;
			case 2:
				latitude = field + "," + fields[index + 1];
				break;
			case 4:
				longitude = field + "," + fields[index + 1];
				break;
			case 6:
				fixQuality = Integer.parseInt(field);
				break;
			case 7:
				numOfSatellites = Integer.parseInt(field);
				break;
			case 8:
				precision = Float.parseFloat(field);
				break;
			case 9:
				altitude = Double.parseDouble(field);
				break;
			case 10:
				unitOfAltitude = field.charAt(0);
				break;
			case 11:
				geoidHeight = Double.parseDouble(field);
				break;
			case 12:
				unitOfGeoidHeight = field.charAt(0);
				break;
			case 14:
				break;
			default:
				break;
			}

		} catch (NumberFormatException e) {
			throw new NMEAParserException("Unable to parse sentence.", e);
		}
	}

	public Time getTime() {
		return time;
	}

	public String getLatitude() {
		return latitude;
	}

	public String getLongitude() {
		return longitude;
	}

	public int getFixQuality() {
		return fixQuality;
	}

	public int getNumOfSatellites() {
		return numOfSatellites;
	}

	public float getPrecision() {
		return precision;
	}

	public double getAltitude() {
		return altitude;
	}

	public char getUnitOfAltitude() {
		return unitOfAltitude;
	}

	public double getGeoidHeight() {
		return geoidHeight;
	}

	public char getUnitOfGeoidHeight() {
		return unitOfGeoidHeight;
	}

	protected void validate() {

	}

	public String toString() {
		return checksum + "  " + time + "  " + latitude + "  " + longitude + "  " + fixQuality + "  " + numOfSatellites + "  " + precision + "  " + altitude + "  "
				+ unitOfAltitude + "  " + geoidHeight + "  " + unitOfGeoidHeight;
	}
}