persistence.xml property values from properties file

I have below configuration for entityManger

<jee:jndi-lookup id="dataSource" expected-type="javax.sql.DataSource"
                     jndi-name="java:jboss/datasources/AppDS"/>

<jee:jndi-lookup id="entityManagerFactory"
                     expected-type="javax.persistence.EntityManagerFactory"
                     jndi-name="java:comp/env/persistence/fusePersistenceUnit"/>

I also have persistence.xml file, now I want to add hibernate-search feature to my application, so I have added below properties in my persistence.xml file ..

<property name="hibernate.search.default.directory_provider" value="filesystem" />
<property name="hibernate.search.default.indexBase" value="/var/lucene/indexes" />

Here I want to externalize indexBase property value to properties file, something like this.

<property name="hibernate.search.default.indexBase" value="${index.location}" />

Can any please suggest how I can achieve this ?

I am using Spring version : 4.

Thanks.