1 /*
2 * Hibernate, Relational Persistence for Idiomatic Java
3 *
4 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
5 * indicated by the @author tags or express copyright attribution
6 * statements applied by the authors. All third-party contributions are
7 * distributed under license by Red Hat Middleware LLC.
8 *
9 * This copyrighted material is made available to anyone wishing to use, modify,
10 * copy, or redistribute it subject to the terms and conditions of the GNU
11 * Lesser General Public License, as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
16 * for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this distribution; if not, write to:
20 * Free Software Foundation, Inc.
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02110-1301 USA
23 *
24 */
25 package org.hibernate.hql.ast.tree;
26
27 import org.hibernate.hql.ast.util.ColumnHelper;
28 import org.hibernate.type.Type;
29
30 import antlr.SemanticException;
31
32 /**
33 * Represents an aggregate function i.e. min, max, sum, avg.
34 *
35 * @author Joshua Davis
36 */
37 public class AggregateNode extends AbstractSelectExpression implements SelectExpression {
38
39 public AggregateNode() {
40 }
41
42 public Type getDataType() {
43 // Get the function return value type, based on the type of the first argument.
44 return getSessionFactoryHelper().findFunctionReturnType( getText(), getFirstChild() );
45 }
46
47 public void setScalarColumnText(int i) throws SemanticException {
48 ColumnHelper.generateSingleScalarColumn( this, i );
49 }
50 }
Save This Page