update attributes with other existing attributes

[#1]

my xml configuration file is as below.

<configuration verbose="false" debugMode="false"> 
	<dataFlows> 
		<dataFlow> 
			<properties> 
				<dept>salary</dept>
				<version>1.0</version>
			</properties> 
			<to>
				<path>d_${dept}/${version}/csv</path> 
			</to> 
		</dataFlow> 
	</dataFlows> 
</configuration>

from LookupAttributes (with XMLFileLookupService), I am able to extract attributes like dept, version and path like below.

dept: salary

version: 1.0

path: d_${dept}/${version}/csv

I have tried to use updateAttribute and create new attribute called

to-path: ${path}

but to-path is also giving value as d_${dept}/${version}/csv

Can anyone help me to get to-path as d_salary/1.0/csv?

[#2 · Accepted solution]

@Pavan Challa There's an answer for a related question that should address this for you. See: https://community.hortonworks.com/questions/109613/nifi-lookupattribute-and-updateattributes.html and https://gist.github.com/jfrazee/26deffba3a7d50e991495e223a020b93