org.hibernate.hql.internal.CollectionSubqueryFactory Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.hql.internal;
import java.util.Map;
import org.hibernate.MappingException;
import org.hibernate.QueryException;
import org.hibernate.engine.internal.JoinSequence;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.sql.JoinFragment;
/**
* Provides the SQL for collection subqueries.
*
* Moved here from PathExpressionParser to make it re-useable.
*
* @author josh
*/
public final class CollectionSubqueryFactory {
private CollectionSubqueryFactory() {
}
public static String createCollectionSubquery(
JoinSequence joinSequence,
Map enabledFilters,
String[] columns) {
try {
JoinFragment join = joinSequence.toJoinFragment( enabledFilters, true );
return "select " + StringHelper.join( ", ", columns )
+ " from " + join.toFromFragmentString().substring( 2 )
+ " where " + join.toWhereFragmentString().substring( 5 );
}
catch (MappingException me) {
throw new QueryException( me );
}
}
}