lcsim/src/org/lcsim/util/hitmap

diff -u -r1.2 -r1.3
--- HitMap.java	20 Dec 2007 03:57:16 -0000	1.2
+++ HitMap.java	5 Jun 2008 17:32:03 -0000	1.3
@@ -1,5 +1,6 @@

 package org.lcsim.util.hitmap;
 

+import java.util.Collection;

 import java.util.Map;
 import java.util.HashMap;
 import org.lcsim.event.CalorimeterHit;

@@ -31,4 +32,14 @@

     public HitMap(Map<Long,CalorimeterHit> map) {
 	super(map);
     }

+
+    /** Constructs a hitmap from a pre-existing List<CalorimeterHit>. */
+    public HitMap(Collection<CalorimeterHit> hits) {
+	super();
+	for (CalorimeterHit hit : hits) {
+	    // Put this hit in the hitmap:
+	    Long cellID = hit.getCellID();
+	    this.put(cellID, hit);
+	}
+    }

 }