// $Id: CollectionSubqueryFactory.java 9046 2006-01-13 03:10:57Z steveebersole $
package org.hibernate.hql;
import org.hibernate.engine.JoinSequence;
import org.hibernate.sql.JoinFragment;
import org.hibernate.MappingException;
import org.hibernate.QueryException;
import org.hibernate.util.StringHelper;
import java.util.Map;
/**
* Provides the SQL for collection subqueries.
* <br>
* Moved here from PathExpressionParser to make it re-useable.
*
* @author josh
*/
public final class CollectionSubqueryFactory {
//TODO: refactor to .sql package
private CollectionSubqueryFactory() {
}
public static String createCollectionSubquery(
JoinSequence joinSequence,
Map enabledFilters,
String[] columns) {
try {
JoinFragment join = joinSequence.toJoinFragment( enabledFilters, true );
return new StringBuffer( "select " )
.append( StringHelper.join( ", ", columns ) )
.append( " from " )
.append( join.toFromFragmentString().substring( 2 ) )// remove initial ", "
.append( " where " )
.append( join.toWhereFragmentString().substring( 5 ) )// remove initial " and "
.toString();
}
catch ( MappingException me ) {
throw new QueryException( me );
}
}
}
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