How to get route time？

[fly2008begin]

Hello！Why the function time() returns NULL in class Route when I run the MatcherExample .offline() ?

I check the function toDebugJSON() to solve the above problem.
I found that you use "for" to get samples' time,but
why the size of samples() is not equal to sequence() sometimes?
Then how to get time in object route?

[smattheis]

1.) The parameter time represents the time cost (travel time) for the route. This is usually not calculated and stored by default but after it's calculated once it is buffered in that variable, see:

barefoot/src/main/java/com/bmwcarit/barefoot/roadmap/Route.java

Lines 100 to 107 in 1faaea4

	public double time() {
	if (time != null) {
	return time;
	} else {
	time = cost(new Time());
	return time;
	}
	}

2.) The size of the sequence in the k-state depends on your policy for matching samples. That means, if samples are temporal out-of-order or you configured a minimal distance or minimum time interval, it will omit samples to improve robustness such that the sequence is not the same size as your sample set, see parameters minDistance and minInterval here:

barefoot/src/main/java/com/bmwcarit/barefoot/matcher/Matcher.java

Lines 353 to 366 in 1faaea4

	/**
	* Matches a full sequence of samples, {@link MatcherSample} objects and returns state
	* representation of the full matching which is a {@link KState} object.
	*
	* @param samples Sequence of samples, {@link MatcherSample} objects.
	* @param minDistance Minimum distance in meters between subsequent samples as criterion to
	* match a sample. (Avoids unnecessary matching where samples are more dense than
	* necessary.)
	* @param minInterval Minimum time interval in milliseconds between subsequent samples as
	* criterion to match a sample. (Avoids unnecessary matching where samples are more dense
	* than necessary.)
	* @return State representation of the full matching which is a {@link KState} object.
	*/
	public MatcherKState mmatch(List<MatcherSample> samples, double minDistance, int minInterval) {