org.hibernate.hql.internal.ast.tree.AggregatedSelectExpression Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2009-2011, Red Hat Inc. 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 Inc.
*
* 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.
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*/
package org.hibernate.hql.internal.ast.tree;
import java.util.List;
import org.hibernate.transform.ResultTransformer;
/**
* Contract for a select expression which aggregates other select expressions together into a single return
*
* @author Steve Ebersole
*/
public interface AggregatedSelectExpression extends SelectExpression {
/**
* Retrieves a list of the selection {@link org.hibernate.type.Type types} being aggregated
*
* @return The list of types.
*/
public List getAggregatedSelectionTypeList();
/**
* Retrieve the aliases for the columns aggregated here.
*
* @return The column aliases.
*/
public String[] getAggregatedAliases();
/**
* Retrieve the {@link ResultTransformer} responsible for building aggregated select expression results into their
* aggregated form.
*
* @return The appropriate transformer
*/
public ResultTransformer getResultTransformer();
/**
* Obtain the java type of the aggregation
*
* @return The java type.
*/
public Class getAggregationResultType();
}