From 2709a8b0b69be40c4a449c7dfefbfef0e6d5e650 Mon Sep 17 00:00:00 2001
From: fjy <fangjin@metamarkets.com>
Date: Wed, 7 May 2014 12:33:42 -0700
Subject: [PATCH] revert changes to hyperUnique

---
 .../query/aggregation/hyperloglog/HyperUniquesSerde.java | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/processing/src/main/java/io/druid/query/aggregation/hyperloglog/HyperUniquesSerde.java b/processing/src/main/java/io/druid/query/aggregation/hyperloglog/HyperUniquesSerde.java
index 6e0ba09c06c..21803229284 100644
--- a/processing/src/main/java/io/druid/query/aggregation/hyperloglog/HyperUniquesSerde.java
+++ b/processing/src/main/java/io/druid/query/aggregation/hyperloglog/HyperUniquesSerde.java
@@ -33,15 +33,12 @@ import io.druid.segment.serde.ComplexMetricExtractor;
 import io.druid.segment.serde.ComplexMetricSerde;
 
 import java.nio.ByteBuffer;
-import java.nio.charset.Charset;
 import java.util.List;
 
 /**
  */
 public class HyperUniquesSerde extends ComplexMetricSerde
 {
-  private final static byte[] NULL_BYTES = "\u0000".getBytes(Charsets.UTF_8);
-
   private static Ordering<HyperLogLogCollector> comparator = new Ordering<HyperLogLogCollector>()
   {
     @Override
@@ -96,11 +93,7 @@ public class HyperUniquesSerde extends ComplexMetricSerde
 
           for (String dimensionValue : dimValues) {
             collector.add(
-                hashFn.hashBytes(
-                    dimensionValue == null
-                    ? NULL_BYTES
-                    : dimensionValue.getBytes(Charsets.UTF_8)
-                ).asBytes()
+                hashFn.hashBytes(dimensionValue.getBytes(Charsets.UTF_8)).asBytes()
             );
           }
           return collector;