parser.java~2~

来自「一个用于手机蓝牙通讯的程序」· JAVA~2~ 代码 · 共 109 行

package gps.parser;

import gps.datatypes.Record;
import gps.exceptions.ParseException;
import gps.exceptions.UnsupportedTypeException;

import java.util.NoSuchElementException;

/**
 * NMEA-0183 Parser. Parses data sent by GPS receiver. As data is being
 * transfered via XML to server, parsing consists in most cases of separating
 * fields.
 * 
 * @author Dominik Schmidt
 */
public class Parser {
	/**
	 * Type not supported.
	 */
	

	/**
	 * Parses a string sent by GPS receiver.
	 * 
	 * @param s
	 *            String to be parsed
	 * @param record
	 *            Record to store data
	 * @return Type of record
	 * @throws UnsupportedTypeException
	 *             If type is not recognized
	 * @throws ParseException
	 *             If there was an error during parsing
	 */
	public static boolean  parse(String s, Record record)
			throws UnsupportedTypeException, ParseException {

		// Tokenizer to separate tokens
		StringTokenizer tokenizer = new StringTokenizer(s,",");
		// Type of record
		int type;
		String temp ;
		try {
			
			if (tokenizer.countTokens()==15) {
			 	
				tokenizer.nextToken();
				temp = tokenizer.nextToken();
				// Time of fix
				record.dateTimeOfFix = calaTime(temp.substring(0,2))+ ":"
				+ temp.substring(2, 4) + ":" + temp.substring(4, 6);

				// Lattitude
				
				record.lattitude = tokenizer.nextToken();
				
				// Lattitude direction
				tokenizer.nextToken();

				// Longitude
				record.longitude = tokenizer.nextToken();

				// Longitude direction			
				
				tokenizer.nextToken();

				record.quality = tokenizer.nextToken();

				record.satelliteCount = tokenizer.nextToken();
				
				tokenizer.nextToken();//
				
				record.altitude = tokenizer.nextToken();
				// Ignore rest
				
				return true;
			}		
		}
		// Parsing exception.
		catch (NoSuchElementException e) {
			throw new ParseException("Unexpected end of input.");
		}
		return false;		
	}
	
	/**
	 * 
	 * @param temp
	 */
	private static String calaTime(String hour)
	{
		int i ;		
		String strHour = null;		
		i = Integer.parseInt(hour.substring(0,2));	
		i+=8;
		i%=24;
		if (i>9)
		{
			strHour = String.valueOf(i);
		}
		
		else
		{
			strHour ="0"+ String.valueOf(i);
		}
		
		return strHour;
	}
}