Substituting user/psswd tokens in XwsSecurityInterceptor policyConfiguration

Hi

This is a question replacing properties in an XML on the classpath using Spring.

I have the following bean in my aplicationContext.xml

Code:

---

      <bean id="xwsSecurityInterceptor"
                class="org.springframework.ws.soap.security.xwss.XwsSecurityInterceptor">
                <property name="policyConfiguration" value="classpath:wss-config.xml" />
                <property name="callbackHandlers">
                        <list>
                                <ref bean="callbackHandler" />
                        </list>
                </property>
        </bean>

---

The wss-config.xml file has an xml snippet like so:

Code:

---

<SecurityConfiguration>
    <UsernameToken name="USERNAME" password="PASSWORD"/>
</SecurityConfiguration>

---

I need to tokenize the name and password in UsernameToken and get the values from a property file. I tried using tokenizing it like so:

Code:

---

<SecurityConfiguration>
    <UsernameToken name="${user.name}" password="${user.password}"/>
</SecurityConfiguration>

---

The user.name and password properties are in a properties file. These properties get substituted in my applicationContext.xml but don't seem to work for the config.xml.

I understand that the config is loaded as a resource into XwsSecurityInterceptor and has nothing to with the Properties Placeholder defined in the ap context but is there a way I can set these properties from a file?