My problem looks simple but I'm not able to resolve it. I have a properties file which contains configuration details of all environments (dev, qa, prod).

Example config.properties:

dev.maxLength=2000  
qa.maxLength=4000

We have a parent Properties file which holds the host name, environment mappings.

Example hosts.properties:

host1=dev
host2=qa

The property name host1 is stored in a bean hostname.

<bean id="hostname"
  factory-bean="localhostInetAddress"
  factory-method="getHostName"/>

To resolve the config properties name I have to join the strings as follows, ${${**hostname**}.maxLength} which should be resolved as ${dev.maxLength}

I tried using SpEL with no success. I am getting Could not resolve placeholder Exception. How can I concatenate a bean value in property place holder? How are dynamic property names constructed?

Spring version 3.2

java spring properties
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