How to merge external context with JBoss global context

<mbean code="org.jboss.naming.ExternalContext" name="jboss.jndi:service=ExternalContext,jndiName=external/ems">
    <attribute name="JndiName">external/ems</attribute>
 <attribute name="Properties">
     java.naming.factory.initial=com.tibco.tibjms.CompanionContext
  java.naming.provider.url=external
  queues=test.bw1,test.fw1
  topics=topic1
 </attribute>
 <attribute name="InitialContext">com.tibco.tibjms.CompanionContext</attribute>
    <attribute name="RemoteAccess">true</attribute>
   </mbean>
   
   @Resource(mappedName = "external/ems/test.fw1", name = "external/ems/test.fw1")
 private Queue testFw1 = null;

//CompanionContext implements own lookup() methods