diff --git a/java/src/org/broadinstitute/sting/playground/gatk/walkers/PrintHapmapGenotypes.java b/java/src/org/broadinstitute/sting/playground/gatk/walkers/PrintHapmapGenotypes.java
new file mode 100644
index 000000000..006cc469e
--- /dev/null
+++ b/java/src/org/broadinstitute/sting/playground/gatk/walkers/PrintHapmapGenotypes.java
@@ -0,0 +1,67 @@
+package org.broadinstitute.sting.playground.gatk.walkers;
+
+import org.broadinstitute.sting.gatk.walkers.*;
+import org.broadinstitute.sting.gatk.refdata.*;
+import org.broadinstitute.sting.gatk.LocusContext;
+import org.broadinstitute.sting.utils.*;
+import org.broadinstitute.sting.utils.Utils;
+import org.broadinstitute.sting.utils.BaseUtils;
+import org.broadinstitute.sting.utils.StingException;
+import org.broadinstitute.sting.utils.cmdLine.Argument;
+import org.broadinstitute.sting.playground.gatk.walkers.varianteval.Histogram;
+
+import java.util.*;
+import java.io.*;
+
+// Sanity check to test HapmapGenotypeROD
+// Compute %dbsnp and transition/transversion rate.
+
+@By(DataSource.REFERENCE)
+@Requires(DataSource.REFERENCE)
+@Allows(DataSource.REFERENCE)
+public class PrintHapmapGenotypes extends RefWalker<Integer, Integer> 
+{
+    //@Argument(required=false, shortName="n_frequency_bins", doc="") public int n_frequency_bins = 20;
+
+    public void initialize() 
+	{
+    }
+
+    public Integer map(RefMetaDataTracker tracker, char ref, LocusContext context) 
+	{
+        // Iterate over each analysis, and update it
+        //rodDbSNP dbsnp =   (rodDbSNP)tracker.lookup("dbsnp", null);
+        HapMapGenotypeROD A = (HapMapGenotypeROD)tracker.lookup("A", null);
+
+		if (A != null) 
+		{ 
+			GenomeLoc loc = A.getLocation();
+			String[] sample_ids = A.getSampleIDs();
+			String[] genotypes  = A.getGenotypes();
+
+			for (int i = 0; i < sample_ids.length; i++)
+			{
+				out.printf("%s %s %s\n", loc, sample_ids[i], genotypes[i]);
+			}
+			out.printf("\n");
+		}	
+
+		return 1;
+    }
+
+    // Given result of map function
+    public Integer reduceInit() { return 0; }
+    public Integer reduce(Integer value, Integer sum) 
+	{
+        return treeReduce(sum,value);
+    }
+    public Integer treeReduce(Integer lhs, Integer rhs) 
+	{
+        return lhs + rhs;
+    }
+
+    public void onTraversalDone(Integer result) 
+	{
+    }
+
+}