package org.hibernate.test.dynamicentity.interceptor;
import java.io.Serializable;
import java.lang.reflect.Proxy;
import org.hibernate.EmptyInterceptor;
import org.hibernate.EntityMode;
import org.hibernate.test.dynamicentity.Company;
import org.hibernate.test.dynamicentity.Customer;
import org.hibernate.test.dynamicentity.ProxyHelper;
/**
* Our custom {@link org.hibernate.Interceptor} impl which performs the
* interpretation of entity-name -> proxy instance and vice-versa.
*
* @author <a href="mailto:steve@hibernate.org">Steve Ebersole </a>
*/
public class ProxyInterceptor extends EmptyInterceptor {
/**
* The callback from Hibernate to determine the entity name given
* a presumed entity instance.
*
* @param object The presumed entity instance.
* @return The entity name (pointing to the proper entity mapping).
*/
public String getEntityName(Object object) {
String entityName = ProxyHelper.extractEntityName( object );
if ( entityName == null ) {
entityName = super.getEntityName( object );
}
return entityName;
}
/**
* The callback from Hibernate in order to build an instance of the
* entity represented by the given entity name. Here, we build a
* {@link Proxy} representing the entity.
*
* @param entityName The entity name for which to create an instance. In our setup,
* this is the interface name.
* @param entityMode The entity mode in which to create an instance. Here, we are only
* interestes in custom behavior for the POJO entity mode.
* @param id The identifier value for the given entity.
* @return The instantiated instance.
*/
public Object instantiate(String entityName, EntityMode entityMode, Serializable id) {
if ( entityMode == EntityMode.POJO ) {
if ( Customer.class.getName().equals( entityName ) ) {
return ProxyHelper.newCustomerProxy( id );
}
else if ( Company.class.getName().equals( entityName ) ) {
return ProxyHelper.newCompanyProxy( id );
}
}
return super.instantiate( entityName, entityMode, id );
}
}