X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fload%2FNmeaMessage.java;fp=src%2Ftim%2Fprune%2Fload%2FNmeaMessage.java;h=83f5382b5e0b32b67e2c7f6e82fe1d64dad34059;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/load/NmeaMessage.java b/src/tim/prune/load/NmeaMessage.java
new file mode 100644
index 0000000..83f5382
--- /dev/null
+++ b/src/tim/prune/load/NmeaMessage.java
@@ -0,0 +1,115 @@
+package tim.prune.load;
+
+import java.util.Calendar;
+
+/**
+ * Class to hold a single NMEA message
+ */
+public class NmeaMessage
+{
+	private String _latitude = null;
+	private String _longitude = null;
+	private String _altitude = null;
+	private String _timestamp = null;
+	private String _date = null;
+	private boolean _fix = false;
+	private boolean _segment = false;
+
+	/**
+	 * Constructor
+	 * @param inLatitude latitude
+	 * @param inLongitude longitude
+	 * @param inAltitude altitude
+	 * @param inTimestamp timestamp
+	 * @param inFix fix = 0, 1 or 2
+	 */
+	public NmeaMessage(String inLatitude, String inLongitude,
+		String inAltitude, String inTimestamp, String inFix)
+	{
+		_latitude = inLatitude;
+		_longitude = inLongitude;
+		_altitude = inAltitude;
+		_timestamp = inTimestamp;
+		_fix = (inFix != null && !inFix.equals("0"));
+	}
+
+	/**
+	 * @return true if message has a fix
+	 */
+	public boolean hasFix() {
+		return _fix;
+	}
+
+	/**
+	 * @param inSegment segment flag
+	 */
+	public void setSegment(boolean inSegment)
+	{
+		_segment = inSegment;
+	}
+
+	/**
+	 * @param inDate date from MRC sentence
+	 */
+	public void setDate(String inDate) {
+		_date = inDate;
+	}
+
+	/**
+	 * @return String array for loading
+	 */
+	public String[] getStrings()
+	{
+		String[] results = new String[] {modify(_latitude), modify(_longitude), _altitude,
+			getTimestamp(), (_segment?"1":"")};
+		return results;
+	}
+
+	/**
+	 * Insert a separator between degrees and minutes
+	 * @param inCoordinate NMEA coordinate string
+	 * @return modified string or input string if format wasn't what was expected
+	 */
+	private static String modify(String inCoordinate)
+	{
+		if (inCoordinate != null && inCoordinate.length() > 6)
+		{
+			int dotPos = inCoordinate.indexOf('.');
+			if (dotPos > 0) {
+				return inCoordinate.substring(0, dotPos-2) + "d" + inCoordinate.substring(dotPos-2);
+			}
+		}
+		return inCoordinate;
+	}
+
+	/**
+	 * Use time from NMEA message, and today's date (as date isn't given in GPGGA messages)
+	 * @return Timestamp in parseable format
+	 */
+	private String getTimestamp()
+	{
+		try
+		{
+			Calendar cal = Calendar.getInstance();
+			// use date if available (today if not)
+			if (_date != null && _date.length() == 6) {
+				try {
+					cal.set(Calendar.DAY_OF_MONTH, Integer.parseInt(_date.substring(0, 2)));
+					cal.set(Calendar.MONTH, Integer.parseInt(_date.substring(2, 4))-1); // month starts at zero
+					int year = Integer.parseInt(_date.substring(4, 6));
+					if (year < 80) {year += 2000;} else {year += 1900;} // two-digit year hack
+					cal.set(Calendar.YEAR, year);
+				}
+				catch (Exception e) {} // ignore exceptions for date, still take time
+			}
+			cal.set(Calendar.HOUR_OF_DAY, Integer.parseInt(_timestamp.substring(0, 2)));
+			cal.set(Calendar.MINUTE, Integer.parseInt(_timestamp.substring(2, 4)));
+			cal.set(Calendar.SECOND, Integer.parseInt(_timestamp.substring(4, 6)));
+			cal.set(Calendar.MILLISECOND, 0);
+			// Return time as number of milliseconds
+			return "" + cal.getTimeInMillis();
+		}
+		catch (Exception e) {}  // ignore parsing errors, just have no timestamp
+		return null;
+	}
+}