asdf2014 commented on a change in pull request #7020: Write null byte when
indexing numeric dimensions with Hadoop
URL: https://github.com/apache/incubator-druid/pull/7020#discussion_r262787803
##########
File path:
indexing-hadoop/src/main/java/org/apache/druid/indexer/InputRowSerde.java
##########
@@ -190,7 +215,7 @@ public void serialize(ByteArrayDataOutput out, Object
value)
@Override
public Long deserialize(ByteArrayDataInput in)
{
- return in.readLong();
+ return isNullByteSet(in) ? null : in.readLong();
Review comment:
Perhaps it would be better to use a functional programming style here.
```java
return Optional.ofNullable(in)
.filter(InputRowSerde::isNotNullByteSet)
.map(ByteArrayDataInput::readLong)
.get();
```
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