src/cgeo/geocaching/sorting/DistanceComparator.java


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package cgeo.geocaching.sorting;

import cgeo.geocaching.cgCache;
import cgeo.geocaching.geopoint.Geopoint;

/**
 * sorts caches by distance to current position
 *
 */
public class DistanceComparator extends AbstractCacheComparator {
	private final Geopoint coords;

	public DistanceComparator(final Geopoint coords) {
		this.coords = coords;
	}

	@Override
	protected boolean canCompare(cgCache cache1, cgCache cache2) {
		return true;
	}

	@Override
	protected int compareCaches(final cgCache cache1, final cgCache cache2) {
		if ((cache1.coords == null || cache2.coords == null)
				&& cache1.distance != null && cache2.distance != null) {
			return Double.compare(cache1.distance, cache2.distance);
		} else {
			if (cache1.coords == null) {
				return 1;
			}
			if (cache2.coords == null) {
				return -1;
			}

			return Float.compare(coords.distanceTo(cache1.coords),
					             coords.distanceTo(cache2.coords));
		}
	}
	
}