Camel is not substituting variable expression in route

[javag]

I have a route in camel.xml like:

<route>
                        
                        <from uri="jms:myfoo" />
                        <doTry>
                                <validate><simple>${body[subsc]} regex 
'[a-z0-9]{8}' </simple>
</validate>
                                <choice>
                                        <when>
                                                <simple>${body[mykey]} regex 
'^(T1|T2)$'</simple>
                                                <choice>
                                                    <when>
                                                           
<simple>${body[serviceName]} == 'getList'</simple>
                                                               <to 
uri="jms:bar.${body[mykey]}.state" />
                                                     </when>
                                                </choice>       
                                        </when>
                                        <otherwise>
                                        <to uri="jms:invalid" />
                                        <stop />
                                        </otherwise>
                                </choice>
                        <doCatch>
                                
<exception>org.apache.camel.ValidationException</exception>
                                <to uri="jms:invalid"/>
                        </doCatch>
                        </doTry>
                                
                </route>
                

When I start activemq and send a message, validation passes and it matches
${body[mykey]} to either T1 or T2  but the message is sent to literally to
bar.${body[mykey]}.state instead of to bar.T1.state or bar.T2.state  i.e. 
it does not substitute the variable body[mykey].

Any idea what is causing this problem? According to camel docs it should
work but it is not working.?

I am using camel 2.10.3 and activemq 5.8.0.



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