/**
* Try to get the proprietary MSSIS timestamp appended to the NMEA sentence
*
* @return
*/
public static Date findMssisTimestamp(SentenceLine sentenceLine) {
if (sentenceLine == null) {
return null;
}
// Go through postfix fields
int start = sentenceLine.getPostfixStart();
if (start < 0) {
return null;
}
for (int i = start; i < sentenceLine.getFields().size(); i++) {
String field = sentenceLine.getFields().get(i);
try {
return new Date(Long.parseLong(field) * 1000);
} catch (NumberFormatException e) {
}
}
return null;
}
/**
* Basic parse of line into sentence parts
*
* @param line
* @throws SentenceException
*/
protected void baseParse(SentenceLine sl) throws SentenceException {
this.orgLines.add(sl.getLine());
// Save raw sentence
rawSentences.add(sl.getSentence());
// Check for comment block
if (sl.getPrefix().length() > 0 && CommentBlock.hasCommentBlock(sl.getPrefix())) {
addCommentBlock(sl.getPrefix());
}
// Check checksum
if (!sl.isChecksumMatch()) {
throw new SentenceException(
"Invalid checksum for line: "
+ sl.getLine()
+ ": "
+ sl.getChecksumField()
+ " should have been: "
+ sl.getChecksumString());
}
if (sl.getFields().size() < 2) {
throw new SentenceException("Invalid sentence, less than two fields");
}
// Check talker/formatter
if (sl.getTalker() == null || sl.getFormatter() == null) {
throw new SentenceException(
"Invalid sentence, wrong talker/formatter: " + sl.getFields().get(0));
}
// Try to get MSSIS timestamp
mssisTimestamp = findMssisTimestamp(sl);
}