diff -N HPSEcalConverterAtoDDriver.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ HPSEcalConverterAtoDDriver.java	20 Mar 2012 23:26:00 -0000	1.1
@@ -0,0 +1,93 @@

+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.lcsim.hps.recon.ecal;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.lcsim.event.CalorimeterHit;
+import org.lcsim.event.EventHeader;
+import org.lcsim.event.RawCalorimeterHit;
+import org.lcsim.geometry.Detector;
+import org.lcsim.geometry.Subdetector;
+import org.lcsim.util.Driver;
+import org.lcsim.util.lcio.LCIOConstants;
+
+/**
+ *
+ * @author Sho Uemura <[log in to unmask]>
+ * @version $Id: HPSEcalConverterAtoDDriver.java,v 1.1 2012/03/20 23:26:00 meeg Exp $
+ */
+public class HPSEcalConverterAtoDDriver extends Driver {
+
+	HPSEcalConverter converter = null;
+	Subdetector ecal;
+	String rawCollectionName = "EcalDigitizedHits";
+	String ecalName;
+	String ecalReadoutName = "EcalHits";
+	String ecalCollectionName;
+	int flags;
+
+	public HPSEcalConverterAtoDDriver() {
+		flags = 0;
+		flags += 1 << LCIOConstants.CHBIT_LONG; //store position
+		flags += 1 << LCIOConstants.RCHBIT_ID1; //store cell ID
+		converter = new HPSEcalConverter(null);
+	}
+
+	public void setPedestal(double pedestal) {
+		converter.setPedestal(pedestal);
+	}
+
+	public void setScale(double scale) {
+		converter.setScale(scale);
+	}
+
+	public void setEcalCollectionName(String ecalCollectionName) {
+		this.ecalCollectionName = ecalCollectionName;
+	}
+
+	public void setEcalName(String ecalName) {
+		this.ecalName = ecalName;
+	}
+
+	public void setRawCollectionName(String rawCollectionName) {
+		this.rawCollectionName = rawCollectionName;
+	}
+
+	@Override
+	public void startOfData() {
+		if (ecalCollectionName == null) {
+			throw new RuntimeException("The parameter ecalCollectionName was not set!");
+		}
+
+		if (ecalName == null) {
+			throw new RuntimeException("The parameter ecalName was not set!");
+		}
+	}
+
+	@Override
+	public void detectorChanged(Detector detector) {
+		// Get the Subdetector.
+		ecal = (Subdetector) detector.getSubdetector(ecalName);
+		converter.setIDDecoder(ecal.getIDDecoder());
+	}
+
+	@Override
+	public void process(EventHeader event) {
+		// Get the list of ECal hits.
+		List<CalorimeterHit> hits = event.get(CalorimeterHit.class, ecalCollectionName);
+		if (hits == null) {
+			throw new RuntimeException("Event is missing ECal hits collection!");
+		}
+
+		ArrayList<RawCalorimeterHit> newHits = new ArrayList<RawCalorimeterHit>();
+
+		for (CalorimeterHit hit : hits) {
+			newHits.add(converter.HitAtoD(hit));
+		}
+
+		event.put(rawCollectionName, newHits, CalorimeterHit.class, flags, ecalReadoutName);
+	}
+}