//$Id: NamedQueryCollectionInitializer.java 10019 2006-06-15 07:50:12Z steve.ebersole@jboss.com $
package org.hibernate.persister.collection;
import java.io.Serializable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.FlushMode;
import org.hibernate.HibernateException;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.impl.AbstractQueryImpl;
import org.hibernate.loader.collection.CollectionInitializer;
/**
* A wrapper around a named query.
* @author Gavin King
*/
public final class NamedQueryCollectionInitializer implements CollectionInitializer {
private final String queryName;
private final CollectionPersister persister;
private static final Logger log = LoggerFactory.getLogger(NamedQueryCollectionInitializer.class);
public NamedQueryCollectionInitializer(String queryName, CollectionPersister persister) {
super();
this.queryName = queryName;
this.persister = persister;
}
public void initialize(Serializable key, SessionImplementor session)
throws HibernateException {
if ( log.isDebugEnabled() ) {
log.debug(
"initializing collection: " +
persister.getRole() +
" using named query: " +
queryName
);
}
//TODO: is there a more elegant way than downcasting?
AbstractQueryImpl query = (AbstractQueryImpl) session.getNamedSQLQuery(queryName);
if ( query.getNamedParameters().length>0 ) {
query.setParameter(
query.getNamedParameters()[0],
key,
persister.getKeyType()
);
}
else {
query.setParameter( 0, key, persister.getKeyType() );
}
query.setCollectionKey( key )
.setFlushMode( FlushMode.MANUAL )
.list();
}
}