/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, 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.transform;
/**
* An implementation of TupleSubsetResultTransformer that ignores a
* tuple element if its corresponding alias is null.
*
* @author Gail Badner
*/
public abstract class AliasedTupleSubsetResultTransformer
extends BasicTransformerAdapter
implements TupleSubsetResultTransformer {
/**
* {@inheritDoc}
*/
public boolean[] includeInTransform(String[] aliases, int tupleLength) {
if ( aliases == null ) {
throw new IllegalArgumentException( "aliases cannot be null" );
}
if ( aliases.length != tupleLength ) {
throw new IllegalArgumentException(
"aliases and tupleLength must have the same length; " +
"aliases.length=" + aliases.length + "tupleLength=" + tupleLength
);
}
boolean[] includeInTransform = new boolean[tupleLength];
for ( int i = 0 ; i < aliases.length ; i++ ) {
if ( aliases[ i ] != null ) {
includeInTransform[ i ] = true;
}
}
return includeInTransform;
}
}