Adding context root to classpath as a resource-root doesn't work

It's not possible to include root of a war in the classpath (using resource-root in jboss-deployment-structure.xml). None of "/", ".", "" values used as resource-root works to solve this.

<jboss-deployment-structure>
     <deployment>
         <resources>
             <resource-root path="/"/>
         </resources>
     </deployment>
</jboss-deployment-structure>