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package cgeo.geocaching.sorting;
import cgeo.geocaching.cgBase;
import cgeo.geocaching.cgCache;
/**
* sorts caches by distance to current position
*
*/
public class DistanceComparator extends AbstractCacheComparator {
private Double latitude = null;
private Double longitude = null;
public DistanceComparator() {
// nothing
}
public DistanceComparator(Double latitudeIn, Double longitudeIn) {
setCoords(latitudeIn, longitudeIn);
}
public void setCoords(Double latitudeIn, Double longitudeIn) {
latitude = latitudeIn;
longitude = longitudeIn;
}
@Override
protected boolean canCompare(cgCache cache1, cgCache cache2) {
return true;
}
@Override
protected int compareCaches(final cgCache cache1, final cgCache cache2) {
if ((cache1.latitude == null || cache1.longitude == null
|| cache2.latitude == null || cache2.longitude == null)
&& cache1.distance != null && cache2.distance != null) {
if (cache1.distance < cache2.distance) {
return -1;
} else if (cache1.distance > cache2.distance) {
return 1;
} else {
return 0;
}
} else {
if (cache1.latitude == null || cache1.longitude == null) {
return 1;
}
if (cache2.latitude == null || cache2.longitude == null) {
return -1;
}
Double distance1 = cgBase.getDistance(latitude, longitude,
cache1.latitude, cache1.longitude);
Double distance2 = cgBase.getDistance(latitude, longitude,
cache2.latitude, cache2.longitude);
if (distance1 < distance2) {
return -1;
} else if (distance1 > distance2) {
return 1;
}
}
return 0;
}
}
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