diff -N MapDAQCellID.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ MapDAQCellID.java	18 Feb 2012 22:51:23 -0000	1.1
@@ -0,0 +1,73 @@

+/*
+ * Class for obtaining the LCSimCellID for a given DAQCellID
+ * 
+ * created: 2/18/2012
+ */
+package org.lcsim;
+
+/**
+ * 
+ * @author homer
+ */
+import java.util.HashMap;
+import java.util.Map;
+import java.io.File;
+import java.io.FileReader;
+import java.nio.channels.FileChannel;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.StreamTokenizer;
+
+public class MapDAQCellID {
+
+//    List<cellmap> SVTCellMap = new ArrayList<cellmap>();
+//    List<cellmap> ECALCellMap = new ArrayList<cellmap>();
+    HashMap<Integer, Integer> SVTCellMap = new HashMap<Integer, Integer>();
+
+    public void addSVTCellToMap(Integer DAQCellID_, Integer LCSimCellID_) {
+        SVTCellMap.put(DAQCellID_, LCSimCellID_);
+    }
+
+    public void fillSVTCellMap() {
+        String fileName = "SVTDAQLCSimMap.dat";
+        File fileIn = new File(fileName);
+
+        try {
+            System.out.println(
+                    "MapDAQCellID::reading SVT DAQtoLCSIM Cell Map from" + fileName + " size: " + fileIn.length());
+//        FileInputStream fileInputStream = new FileInputStream(fileIn);
+//        FileChannel inputChannel = fileInputStream.getChannel();
+            FileReader fr = new FileReader(fileIn);
+            StreamTokenizer tok = new StreamTokenizer(fr);
+            tok.resetSyntax();
+            tok.wordChars(33, 255);
+            tok.parseNumbers();
+            tok.whitespaceChars(0, ' ');
+            tok.eolIsSignificant(true);
+            //        long sz = inputChannel.size();
+
+            while (tok.nextToken() != tok.TT_EOF) {
+//            System.out.println(nums.toString());
+
+                Integer DAQCellID_ = Integer.valueOf(tok.sval);
+                tok.nextToken();
+                Integer LCSimCellID_ = Integer.valueOf(tok.sval);
+                tok.nextToken(); // this should be the end of the line
+                if (tok.ttype == tok.TT_EOL) {
+                    throw new RuntimeException("Unexpected entry for number of cellIDs");
+                }
+
+//            String line = fr.readLine();
+                SVTCellMap.put(DAQCellID_, LCSimCellID_);
+            }
+        } catch (IOException e) {
+            System.out.println(e);
+        }
+
+    }
+
+    public Integer SVTCellIDlookup(Long DAQCellID_) {
+        return (SVTCellMap.get(DAQCellID_));
+    }
+//            System.out.println("this LCSimCellID(=" + LCSimCellID_ + ") was found for DAQCellID(=" + DAQCellID_ + ")");
+}