public static String expand(String varName) throws MalformedObjectNameException {  	
		com.ibm.websphere.management.AdminService as = 
			com.ibm.websphere.management.AdminServiceFactory.getAdminService();  
	
		String server = as.getProcessName();  
		
		try {
			java.util.Set result = as.queryNames(new javax.management.ObjectName("*:*,type=AdminOperations,process=" 
					+ server), null);  
			
			if (result == null)
				return null;
			
			return (String)as.invoke((javax.management.ObjectName) 
					result.iterator().next(), "expandVariable", new Object[] 
					{"${"+ varName +"}"}, new String[] {"java.lang.String"});
		} catch (javax.management.JMException e) {
			System.out.println("Variable " + varName + " is not found");
			return null;
		}
	}