Settng the schema of a Hibernate entity extra to the default schema configuration - spring

Question

I have a Hibernate / Spring 4 application, where the default schema of the entity classes is already configured, e.g. they end up mapped as testschema.table or prodschema.table.
However there is another entity class which needs its own configurable schema, e.g. only this entity must be mapped to testschema2.anothertable or prodschema2.anothertable.
Nice would be something like this:
#Entity
#Table(name="anothertable", schema = "${db.AntherEntitySchema}")
public class AnotherEntity {
// ..
}
where the schema gets injected from the properties file, but such a feature seems only to work with the #Value annotation.
Any idea how to proceed?

Answer 1

We solved it by this applicationContextPersistence.ctx.xml
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="persistenceXmlLocation"
value="classpath:META-INF/persistence-${env}.xml" />
<!-- .. -->
</bean>
where Spring can substitute the ${} expression from a property file.
We then have a persistence-dev.xml etc which features a specific orm-dev.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence
version="2.0"
xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="fooUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<mapping-file>META-INF/orm-dev.xml</mapping-file>
</persistence-unit>
<!-- .. -->
</persistence>
The orm-dev.xml is now responsible for the entity mapping:
<?xml version="1.0" encoding="UTF-8" ?>
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm
http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
version="1.0">
<description> XML Mapping file</description>
<package>foo.server.model</package>
<entity class="AnotherEntity">
<table schema="testschema2" name="anothertable" />
<attributes>
<!-- .. -->
</attributes>
</entity>
</entity-mappings>
Finally we removed the mapping annotations from the AnotherEntity POJO, as this one is now mapped via the orm-dev.xml file. The other enitity classes kept their annotations.
Note: We use the Spring Tool Suite flavour of Eclipse. This IDE expects a persistence.xml, so to get rid of an error message we kept a minimal persistence.xml to not have to remember the IDE option which deactivates the validator.