1 package org.lcsim.recon.cluster.util;
2
3 import java.util.Comparator;
4 import org.lcsim.event.Cluster;
5 /** A Comparator for sorting Clusters
6 * @author Norman A. Graf
7 * @version 1.0
8 */
9 public class ClusterESort implements Comparator
10 {
11
12 /** The compare function used for sorting.
13 * Comparison is done on cluster energy.
14 * @param obj1 Cluster1
15 * @param obj2 Cluster2
16 * @return
17 * <ol>
18 * <li> -1 if Cluster1 > Cluster2
19 * <li> 0 if Cluster1 = Cluster2
20 * <li> 1 if Cluster1 < Cluster2
21 * </ol>
22 */
23 public int compare(Object obj1, Object obj2)
24 {
25 if(obj1==obj2) return 0;
26 Cluster v1 = (Cluster) obj1;
27 Cluster v2 = (Cluster) obj2;
28 if(v1.getEnergy()-v2.getEnergy()>0.) return -1;
29 return 1;
30 }
31 }