How to access environment variables from pluggable destination?

Hi,
I'm trying to create a java puggable destination for reports. Everything is working fine.
I want to access reports environment variables from the java code (like REPORTS_PATH and other new variables that I want to create), but I can't find anything about this in the java API documentation.
I want to use environment variables instead of destination properties (those I can easily access), because I want to be able to change context using env_id.
Any ideas?
Thanks,
Luis

I'm using Oracle Application Server Version 10.1.2.0.2
Thanks

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