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package tim.prune.load;
import java.util.ArrayList;
/**
* Class to hold and manage a list of track names
* from a gpx file, and report back which points
* belong to which track
*/
public class TrackNameList
{
/** Current point number */
private int _pointNum = -1;
/** Current track number */
private int _trackNum = -1;
/** List of unique track names */
private ArrayList<String> _trackNames = new ArrayList<String>();
/** List of point numbers at the start of each track */
private ArrayList<Integer> _startIndices = new ArrayList<Integer>();
/**
* Inform list of a new point
* @param inTrackNum number of track, starting at zero
* @param inTrackName name of track, if any
* @param inIsTrackpoint true if point is a trackpoint
*/
public void addPoint(int inTrackNum, String inTrackName, boolean inIsTrackpoint)
{
_pointNum++;
if (inIsTrackpoint)
{
if (inTrackNum != _trackNum) {
_trackNames.add(inTrackName);
_startIndices.add(Integer.valueOf(_pointNum));
}
}
_trackNum = inTrackNum;
}
/**
* @return number of tracks found in file
*/
public int getNumTracks()
{
return _trackNames.size();
}
/**
* @param inTrackNum index of track, starting from zero
* @return name of specified track (or null if none given)
*/
public String getTrackName(int inTrackNum)
{
if (inTrackNum < 0 || inTrackNum >= getNumTracks()) {return "";}
String name = _trackNames.get(inTrackNum);
return name;
}
/**
* @param inTrackNum index of track, starting from zero
* @return number of points in the specified track
*/
public int getNumPointsInTrack(int inTrackNum)
{
if (inTrackNum < 0 || inTrackNum >= getNumTracks()) {return 0;}
if (inTrackNum == (getNumTracks()-1)) {
// last track, use total points
return _pointNum - _startIndices.get(inTrackNum) + 1;
}
return _startIndices.get(inTrackNum+1) - _startIndices.get(inTrackNum);
}
/**
* @param inTrackNum index of track, starting from zero
* @return start index of the specified track
*/
public int getStartIndex(int inTrackNum)
{
if (inTrackNum < 0 || inTrackNum >= getNumTracks()) {return 0;}
return _startIndices.get(inTrackNum);
}
}
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