diff --git a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/comparators/DoubleBinaryComparatorFactory.java b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/comparators/DoubleBinaryComparatorFactory.java
new file mode 100644
index 0000000..983dcb8
--- /dev/null
+++ b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/comparators/DoubleBinaryComparatorFactory.java
@@ -0,0 +1,25 @@
+package edu.uci.ics.hyracks.dataflow.common.data.comparators;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+import edu.uci.ics.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
+
+public class DoubleBinaryComparatorFactory implements IBinaryComparatorFactory {
+    private static final long serialVersionUID = 1L;
+
+    public static final DoubleBinaryComparatorFactory INSTANCE = new DoubleBinaryComparatorFactory();
+
+    private DoubleBinaryComparatorFactory() {
+    }
+
+    @Override
+    public IBinaryComparator createBinaryComparator() {
+        return new IBinaryComparator() {
+            @Override
+            public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {   
+                return Double.compare(DoubleSerializerDeserializer.getDouble(b1, s1), DoubleSerializerDeserializer
+                        .getDouble(b2, s2));
+            }
+        };
+    }
+}
\ No newline at end of file
diff --git a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/DoubleSerializerDeserializer.java b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/DoubleSerializerDeserializer.java
new file mode 100644
index 0000000..82c80e6
--- /dev/null
+++ b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/DoubleSerializerDeserializer.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.dataflow.common.data.marshalling;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class DoubleSerializerDeserializer implements ISerializerDeserializer<Double> {
+    private static final long serialVersionUID = 1L;
+
+    public static final DoubleSerializerDeserializer INSTANCE = new DoubleSerializerDeserializer();
+
+    private DoubleSerializerDeserializer() {
+    }
+
+    @Override
+    public Double deserialize(DataInput in) throws HyracksDataException {
+        try {
+            return in.readDouble();
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void serialize(Double instance, DataOutput out) throws HyracksDataException {
+        try {
+            out.writeDouble(instance.doubleValue());
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    public static double getDouble(byte[] bytes, int offset) {
+        return Double.longBitsToDouble(getLongBits(bytes, offset));
+    }
+
+    public static int getIntBits(byte[] bytes, int offset) {
+        return IntegerSerializerDeserializer.getInt(bytes, offset);
+    }
+
+    public static long getLongBits(byte[] bytes, int offset) {
+        return Integer64SerializerDeserializer.getLong(bytes, offset);
+    }
+    
+    
+}
\ No newline at end of file
diff --git a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/Integer64SerializerDeserializer.java b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/Integer64SerializerDeserializer.java
new file mode 100644
index 0000000..effc092
--- /dev/null
+++ b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/Integer64SerializerDeserializer.java
@@ -0,0 +1,44 @@
+package edu.uci.ics.hyracks.dataflow.common.data.marshalling;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class Integer64SerializerDeserializer implements ISerializerDeserializer<Long> {
+
+    private static final long serialVersionUID = 1L;
+
+    public static final Integer64SerializerDeserializer INSTANCE = new Integer64SerializerDeserializer();
+
+    private Integer64SerializerDeserializer() {
+    }
+
+    @Override
+    public Long deserialize(DataInput in) throws HyracksDataException {
+        try {
+            return in.readLong();
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void serialize(Long instance, DataOutput out) throws HyracksDataException {
+        try {
+            out.writeLong(instance.longValue());
+        } catch (IOException ioe) {
+            throw new HyracksDataException(ioe);
+        }
+    }
+
+    public static long getLong(byte[] bytes, int offset) {
+        return (((long) (bytes[offset] & 0xff)) << 56) + (((long) (bytes[offset + 1] & 0xff)) << 48)
+                + (((long) (bytes[offset + 2] & 0xff)) << 40) + (((long) (bytes[offset + 3] & 0xff)) << 32)
+                + (((long) (bytes[offset + 4] & 0xff)) << 24) + (((long) (bytes[offset + 5] & 0xff)) << 16)
+                + (((long) (bytes[offset + 6] & 0xff)) << 8) + (((long) (bytes[offset + 7] & 0xff)) << 0);
+    }
+
+}