Ibatis - spring pass properties dinamycally

I have this situation:

Ibatis 2.3.5 Spring 3.0.7

A query file query.xml:

 <sqlMap namespace="oracle">

 <cacheModel type="MEMORY" id="minsCache">
    <flushInterval minutes="${pippo}" />
 </cacheModel>
 <select id="doQuery" resultClass="HashMap" cacheModel="minsCache">
     select * from table
 </select>
</sqlMap>

and a config file DAOConfig.xml:

<sqlMapConfig>
 <properties url="file:<my_path>/test.properties" />
 <settings useStatementNamespaces="true" />
 <sqlMap resource="dao/oracle/query.xml"/>
</sqlMapConfig>

my test.properties file contains a single value: pippo=1

in my spring application everything works fine with this config, but i would like to pass ${pippo} parameter from my webapp context instead than a properties file. The reason is my test.properties will be outside WAR file and i find wrong referencing it from a file kept inside a WAR (DAOConfig.xml) using absolute path.

My goal would be with a simple stop/start of my application server to set a different cache flushinterval.

I've also used with non results Spring utils namespace to register my properties files inside webapp context, but regardless this successfull operation a can't correctly pass any parameter to my query.xml without setting a properties attribute in DAOConfig.xml file...

ANY succestion??